/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:45:50,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:45:50,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:45:50,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:45:50,244 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 12:45:50,262 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:45:50,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:45:50,262 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:45:50,263 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:45:50,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:45:50,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:45:50,264 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:45:50,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:45:50,264 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:45:50,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:45:50,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:45:50,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:45:50,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:45:50,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:45:50,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:45:50,264 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:45:50,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:45:50,265 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:45:50,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:45:50,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:45:50,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:45:50,265 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:45:50,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:45:50,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:45:50,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:45:50,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:45:50,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:45:50,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:45:50,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:45:50,266 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:45:50,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:45:50,266 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:45:50,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:45:50,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:45:50,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:45:50,508 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:45:50,508 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:45:50,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl [2021-08-21 12:45:50,509 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl' [2021-08-21 12:45:50,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:45:50,541 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:45:50,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:45:50,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:45:50,542 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:45:50,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:50" (1/1) ... [2021-08-21 12:45:50,555 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:50" (1/1) ... [2021-08-21 12:45:50,560 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:45:50,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:45:50,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:45:50,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:45:50,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:50" (1/1) ... [2021-08-21 12:45:50,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:50" (1/1) ... [2021-08-21 12:45:50,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:50" (1/1) ... [2021-08-21 12:45:50,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:50" (1/1) ... [2021-08-21 12:45:50,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:50" (1/1) ... [2021-08-21 12:45:50,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:50" (1/1) ... [2021-08-21 12:45:50,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:50" (1/1) ... [2021-08-21 12:45:50,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:45:50,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:45:50,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:45:50,577 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:45:50,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:50" (1/1) ... [2021-08-21 12:45:50,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:45:50,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:50,618 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 12:45:50,645 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 12:45:50,658 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:45:50,658 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:45:50,658 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:45:50,658 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:45:50,658 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:45:50,658 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:45:50,659 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:45:50,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:45:50,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:45:50,659 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 12:45:50,772 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:45:50,772 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 12:45:50,774 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:45:50 BoogieIcfgContainer [2021-08-21 12:45:50,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:45:50,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:45:50,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:45:50,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:45:50,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:50" (1/2) ... [2021-08-21 12:45:50,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f5cbdc8 and model type nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:45:50, skipping insertion in model container [2021-08-21 12:45:50,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:45:50" (2/2) ... [2021-08-21 12:45:50,779 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr.wvr.bpl [2021-08-21 12:45:50,782 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:45:50,782 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:45:50,782 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:45:50,783 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:45:50,811 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 12:45:50,857 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:45:50,861 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 12:45:50,861 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 12:45:50,867 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-08-21 12:45:50,880 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:50,882 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:50,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:45:50,886 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:50,886 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:50,887 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:50,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:50,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1631855703, now seen corresponding path program 1 times [2021-08-21 12:45:50,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:50,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809906072] [2021-08-21 12:45:50,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:50,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:50,993 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 12:45:50,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:50,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809906072] [2021-08-21 12:45:50,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809906072] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:45:50,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:45:50,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:45:50,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933767268] [2021-08-21 12:45:50,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:45:50,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:51,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:45:51,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:45:51,015 INFO L87 Difference]: Start difference. First operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:51,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:51,077 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-08-21 12:45:51,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:45:51,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:45:51,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:51,090 INFO L225 Difference]: With dead ends: 43 [2021-08-21 12:45:51,090 INFO L226 Difference]: Without dead ends: 43 [2021-08-21 12:45:51,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:45:51,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-21 12:45:51,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-08-21 12:45:51,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:51,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-08-21 12:45:51,120 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-08-21 12:45:51,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:51,121 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-08-21 12:45:51,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:51,122 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-08-21 12:45:51,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:45:51,123 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:51,124 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 12:45:51,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:45:51,124 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:51,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:51,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1473491929, now seen corresponding path program 1 times [2021-08-21 12:45:51,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:51,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446555611] [2021-08-21 12:45:51,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:51,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:51,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:45:51,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:51,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446555611] [2021-08-21 12:45:51,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446555611] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:45:51,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:45:51,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:45:51,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401424461] [2021-08-21 12:45:51,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:45:51,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:51,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:45:51,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:45:51,215 INFO L87 Difference]: Start difference. First operand 38 states and 67 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 12:45:51,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:51,249 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-08-21 12:45:51,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:45:51,249 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 12:45:51,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:51,252 INFO L225 Difference]: With dead ends: 50 [2021-08-21 12:45:51,252 INFO L226 Difference]: Without dead ends: 50 [2021-08-21 12:45:51,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:45:51,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-21 12:45:51,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-08-21 12:45:51,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:51,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-08-21 12:45:51,265 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-08-21 12:45:51,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:51,265 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-08-21 12:45:51,265 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 12:45:51,265 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-08-21 12:45:51,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:45:51,266 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:51,266 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:51,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 12:45:51,266 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:51,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:51,268 INFO L82 PathProgramCache]: Analyzing trace with hash 917506533, now seen corresponding path program 1 times [2021-08-21 12:45:51,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:51,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903012645] [2021-08-21 12:45:51,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:51,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:51,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:51,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903012645] [2021-08-21 12:45:51,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903012645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:51,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879913107] [2021-08-21 12:45:51,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:51,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:51,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:51,410 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 12:45:51,413 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 12:45:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:51,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:45:51,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:51,681 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 12:45:51,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879913107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:51,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:51,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-21 12:45:51,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435596175] [2021-08-21 12:45:51,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:45:51,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:51,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:45:51,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:45:51,686 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:51,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:51,716 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2021-08-21 12:45:51,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:45:51,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:45:51,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:51,717 INFO L225 Difference]: With dead ends: 99 [2021-08-21 12:45:51,717 INFO L226 Difference]: Without dead ends: 78 [2021-08-21 12:45:51,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:45:51,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-21 12:45:51,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2021-08-21 12:45:51,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:51,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2021-08-21 12:45:51,723 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 19 [2021-08-21 12:45:51,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:51,723 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2021-08-21 12:45:51,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:51,723 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2021-08-21 12:45:51,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:45:51,724 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:51,724 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:51,745 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 12:45:51,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:51,933 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:51,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:51,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1069238711, now seen corresponding path program 2 times [2021-08-21 12:45:51,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:51,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359643900] [2021-08-21 12:45:51,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:51,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:51,995 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 12:45:51,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:51,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359643900] [2021-08-21 12:45:51,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359643900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:51,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851677280] [2021-08-21 12:45:51,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:45:51,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:51,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:51,997 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 12:45:51,998 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 12:45:52,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:45:52,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:52,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:45:52,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:52,221 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 12:45:52,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851677280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:52,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:52,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 12:45:52,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857317712] [2021-08-21 12:45:52,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:45:52,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:52,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:45:52,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:45:52,223 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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 12:45:52,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:52,243 INFO L93 Difference]: Finished difference Result 80 states and 151 transitions. [2021-08-21 12:45:52,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:45:52,243 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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 19 [2021-08-21 12:45:52,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:52,244 INFO L225 Difference]: With dead ends: 80 [2021-08-21 12:45:52,244 INFO L226 Difference]: Without dead ends: 77 [2021-08-21 12:45:52,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:45:52,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-21 12:45:52,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2021-08-21 12:45:52,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:52,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-08-21 12:45:52,248 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 19 [2021-08-21 12:45:52,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:52,248 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-08-21 12:45:52,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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 12:45:52,249 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-08-21 12:45:52,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:45:52,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:52,249 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:52,270 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 12:45:52,470 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 12:45:52,470 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:52,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:52,471 INFO L82 PathProgramCache]: Analyzing trace with hash 859525155, now seen corresponding path program 3 times [2021-08-21 12:45:52,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:52,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968826415] [2021-08-21 12:45:52,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:52,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:52,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:52,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968826415] [2021-08-21 12:45:52,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968826415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:52,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840662951] [2021-08-21 12:45:52,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:45:52,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:52,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:52,560 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 12:45:52,561 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 12:45:52,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:45:52,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:52,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:45:52,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:52,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840662951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:52,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:52,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:45:52,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040581497] [2021-08-21 12:45:52,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:45:52,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:52,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:45:52,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:45:52,864 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 12:45:53,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:53,150 INFO L93 Difference]: Finished difference Result 198 states and 365 transitions. [2021-08-21 12:45:53,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:45:53,151 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 12:45:53,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:53,152 INFO L225 Difference]: With dead ends: 198 [2021-08-21 12:45:53,152 INFO L226 Difference]: Without dead ends: 192 [2021-08-21 12:45:53,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 264.4ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:45:53,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-21 12:45:53,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 90. [2021-08-21 12:45:53,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:53,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 181 transitions. [2021-08-21 12:45:53,157 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 181 transitions. Word has length 21 [2021-08-21 12:45:53,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:53,158 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 181 transitions. [2021-08-21 12:45:53,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 12:45:53,158 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 181 transitions. [2021-08-21 12:45:53,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:45:53,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:53,158 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:53,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-08-21 12:45:53,376 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 12:45:53,379 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:53,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:53,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1109337493, now seen corresponding path program 4 times [2021-08-21 12:45:53,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:53,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414793760] [2021-08-21 12:45:53,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:53,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:53,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:53,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414793760] [2021-08-21 12:45:53,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414793760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:53,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693121060] [2021-08-21 12:45:53,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:45:53,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:53,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:53,543 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 12:45:53,544 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 12:45:53,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:45:53,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:53,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:45:53,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:53,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693121060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:53,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:53,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-08-21 12:45:53,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005799539] [2021-08-21 12:45:53,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:45:53,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:53,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:45:53,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:45:53,859 INFO L87 Difference]: Start difference. First operand 90 states and 181 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:54,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:54,142 INFO L93 Difference]: Finished difference Result 170 states and 325 transitions. [2021-08-21 12:45:54,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:45:54,143 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 12:45:54,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:54,143 INFO L225 Difference]: With dead ends: 170 [2021-08-21 12:45:54,143 INFO L226 Difference]: Without dead ends: 166 [2021-08-21 12:45:54,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:45:54,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-08-21 12:45:54,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 92. [2021-08-21 12:45:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 183 transitions. [2021-08-21 12:45:54,149 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 183 transitions. Word has length 21 [2021-08-21 12:45:54,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:54,149 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 183 transitions. [2021-08-21 12:45:54,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:54,149 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 183 transitions. [2021-08-21 12:45:54,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:45:54,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:54,150 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:54,168 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 12:45:54,364 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 12:45:54,365 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:54,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:54,365 INFO L82 PathProgramCache]: Analyzing trace with hash 446728737, now seen corresponding path program 5 times [2021-08-21 12:45:54,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:54,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197464987] [2021-08-21 12:45:54,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:54,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:54,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:54,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197464987] [2021-08-21 12:45:54,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197464987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:54,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628710037] [2021-08-21 12:45:54,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:45:54,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:54,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:54,430 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 12:45:54,431 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 12:45:54,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:45:54,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:54,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:45:54,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:54,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628710037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:54,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:54,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 12:45:54,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828920897] [2021-08-21 12:45:54,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:45:54,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:54,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:45:54,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:45:54,651 INFO L87 Difference]: Start difference. First operand 92 states and 183 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:54,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:54,669 INFO L93 Difference]: Finished difference Result 190 states and 376 transitions. [2021-08-21 12:45:54,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:45:54,670 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:45:54,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:54,671 INFO L225 Difference]: With dead ends: 190 [2021-08-21 12:45:54,671 INFO L226 Difference]: Without dead ends: 163 [2021-08-21 12:45:54,673 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:45:54,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-08-21 12:45:54,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 120. [2021-08-21 12:45:54,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0840336134453783) internal successors, (248), 119 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:54,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 248 transitions. [2021-08-21 12:45:54,683 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 248 transitions. Word has length 23 [2021-08-21 12:45:54,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:54,683 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 248 transitions. [2021-08-21 12:45:54,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:54,683 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 248 transitions. [2021-08-21 12:45:54,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:45:54,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:54,684 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:54,700 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 12:45:54,888 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 12:45:54,889 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:54,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:54,889 INFO L82 PathProgramCache]: Analyzing trace with hash -948358029, now seen corresponding path program 6 times [2021-08-21 12:45:54,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:54,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020947545] [2021-08-21 12:45:54,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:54,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:55,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:55,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020947545] [2021-08-21 12:45:55,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020947545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:55,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379382856] [2021-08-21 12:45:55,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:45:55,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:55,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:55,025 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 12:45:55,028 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 12:45:55,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:45:55,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:55,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:45:55,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:55,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379382856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:55,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:55,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 12:45:55,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268606112] [2021-08-21 12:45:55,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:45:55,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:55,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:45:55,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:45:55,402 INFO L87 Difference]: Start difference. First operand 120 states and 248 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:55,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:55,805 INFO L93 Difference]: Finished difference Result 320 states and 619 transitions. [2021-08-21 12:45:55,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:45:55,805 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:45:55,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:55,809 INFO L225 Difference]: With dead ends: 320 [2021-08-21 12:45:55,809 INFO L226 Difference]: Without dead ends: 302 [2021-08-21 12:45:55,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 390.1ms TimeCoverageRelationStatistics Valid=246, Invalid=876, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:45:55,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-08-21 12:45:55,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 141. [2021-08-21 12:45:55,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.092857142857143) internal successors, (293), 140 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:55,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 293 transitions. [2021-08-21 12:45:55,828 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 293 transitions. Word has length 23 [2021-08-21 12:45:55,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:55,828 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 293 transitions. [2021-08-21 12:45:55,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:55,828 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 293 transitions. [2021-08-21 12:45:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:45:55,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:55,829 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:55,851 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 12:45:56,045 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 12:45:56,045 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:56,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:56,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1017367007, now seen corresponding path program 7 times [2021-08-21 12:45:56,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:56,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816041710] [2021-08-21 12:45:56,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:56,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:56,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:56,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816041710] [2021-08-21 12:45:56,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816041710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:56,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321927887] [2021-08-21 12:45:56,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:45:56,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:56,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:56,122 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 12:45:56,123 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 12:45:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:56,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:45:56,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:56,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321927887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:56,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:56,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-21 12:45:56,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501308122] [2021-08-21 12:45:56,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:45:56,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:56,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:45:56,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:45:56,483 INFO L87 Difference]: Start difference. First operand 141 states and 293 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:56,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:56,780 INFO L93 Difference]: Finished difference Result 321 states and 651 transitions. [2021-08-21 12:45:56,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:45:56,780 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:45:56,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:56,781 INFO L225 Difference]: With dead ends: 321 [2021-08-21 12:45:56,781 INFO L226 Difference]: Without dead ends: 317 [2021-08-21 12:45:56,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 252.8ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:45:56,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-08-21 12:45:56,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 173. [2021-08-21 12:45:56,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.1744186046511627) internal successors, (374), 172 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 374 transitions. [2021-08-21 12:45:56,786 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 374 transitions. Word has length 23 [2021-08-21 12:45:56,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:56,787 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 374 transitions. [2021-08-21 12:45:56,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:56,787 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 374 transitions. [2021-08-21 12:45:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:45:56,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:56,787 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:56,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:56,996 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 12:45:56,997 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:56,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:56,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1216183969, now seen corresponding path program 8 times [2021-08-21 12:45:56,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:56,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516279570] [2021-08-21 12:45:56,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:56,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:57,074 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:57,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:57,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516279570] [2021-08-21 12:45:57,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516279570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:57,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748276069] [2021-08-21 12:45:57,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:45:57,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:57,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:57,076 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 12:45:57,077 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 12:45:57,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:45:57,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:57,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:45:57,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:57,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748276069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:57,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:57,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-21 12:45:57,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089080412] [2021-08-21 12:45:57,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:45:57,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:57,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:45:57,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:45:57,538 INFO L87 Difference]: Start difference. First operand 173 states and 374 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 12:45:58,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:58,035 INFO L93 Difference]: Finished difference Result 435 states and 865 transitions. [2021-08-21 12:45:58,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:45:58,035 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 25 [2021-08-21 12:45:58,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:58,037 INFO L225 Difference]: With dead ends: 435 [2021-08-21 12:45:58,037 INFO L226 Difference]: Without dead ends: 417 [2021-08-21 12:45:58,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 465.9ms TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:45:58,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-08-21 12:45:58,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 186. [2021-08-21 12:45:58,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.156756756756757) internal successors, (399), 185 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:58,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 399 transitions. [2021-08-21 12:45:58,043 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 399 transitions. Word has length 25 [2021-08-21 12:45:58,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:58,043 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 399 transitions. [2021-08-21 12:45:58,043 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 12:45:58,043 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 399 transitions. [2021-08-21 12:45:58,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:45:58,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:58,044 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:58,063 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 12:45:58,261 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 12:45:58,261 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:58,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:58,262 INFO L82 PathProgramCache]: Analyzing trace with hash -580006123, now seen corresponding path program 9 times [2021-08-21 12:45:58,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:58,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106410373] [2021-08-21 12:45:58,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:58,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:58,350 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:58,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:58,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106410373] [2021-08-21 12:45:58,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106410373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:58,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085284736] [2021-08-21 12:45:58,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:45:58,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:58,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:58,351 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 12:45:58,352 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 12:45:58,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:45:58,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:58,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:45:58,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:58,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:58,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085284736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:58,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:58,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-08-21 12:45:58,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531415724] [2021-08-21 12:45:58,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:45:58,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:58,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:45:58,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:45:58,813 INFO L87 Difference]: Start difference. First operand 186 states and 399 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:59,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:59,243 INFO L93 Difference]: Finished difference Result 340 states and 687 transitions. [2021-08-21 12:45:59,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:45:59,244 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:45:59,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:59,245 INFO L225 Difference]: With dead ends: 340 [2021-08-21 12:45:59,245 INFO L226 Difference]: Without dead ends: 336 [2021-08-21 12:45:59,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 401.1ms TimeCoverageRelationStatistics Valid=368, Invalid=1038, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:45:59,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-08-21 12:45:59,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 186. [2021-08-21 12:45:59,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.151351351351351) internal successors, (398), 185 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:59,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 398 transitions. [2021-08-21 12:45:59,250 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 398 transitions. Word has length 25 [2021-08-21 12:45:59,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:59,251 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 398 transitions. [2021-08-21 12:45:59,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:59,251 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 398 transitions. [2021-08-21 12:45:59,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:45:59,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:59,251 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:59,270 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 12:45:59,462 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 12:45:59,462 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:59,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:59,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1444914083, now seen corresponding path program 10 times [2021-08-21 12:45:59,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:59,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739962149] [2021-08-21 12:45:59,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:59,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:59,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:59,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739962149] [2021-08-21 12:45:59,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739962149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:59,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115810235] [2021-08-21 12:45:59,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:45:59,527 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:59,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:59,528 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 12:45:59,528 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 12:45:59,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:45:59,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:59,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:45:59,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:59,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:59,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115810235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:59,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:59,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 12:45:59,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885708863] [2021-08-21 12:45:59,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:45:59,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:59,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:45:59,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:45:59,867 INFO L87 Difference]: Start difference. First operand 186 states and 398 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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 12:45:59,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:59,906 INFO L93 Difference]: Finished difference Result 354 states and 734 transitions. [2021-08-21 12:45:59,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:45:59,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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 27 [2021-08-21 12:45:59,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:59,909 INFO L225 Difference]: With dead ends: 354 [2021-08-21 12:45:59,909 INFO L226 Difference]: Without dead ends: 321 [2021-08-21 12:45:59,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:45:59,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-08-21 12:45:59,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 242. [2021-08-21 12:45:59,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.203319502074689) internal successors, (531), 241 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:59,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 531 transitions. [2021-08-21 12:45:59,915 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 531 transitions. Word has length 27 [2021-08-21 12:45:59,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:59,915 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 531 transitions. [2021-08-21 12:45:59,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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 12:45:59,916 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 531 transitions. [2021-08-21 12:45:59,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:45:59,916 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:59,916 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:59,934 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 12:46:00,127 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 12:46:00,127 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:00,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:00,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1020645679, now seen corresponding path program 11 times [2021-08-21 12:46:00,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:00,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225216485] [2021-08-21 12:46:00,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:00,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:00,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:00,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225216485] [2021-08-21 12:46:00,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225216485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:00,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672073945] [2021-08-21 12:46:00,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:46:00,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:00,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:00,272 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 12:46:00,273 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 12:46:00,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:46:00,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:00,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:46:00,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:00,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672073945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:00,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:00,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-21 12:46:00,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049457400] [2021-08-21 12:46:00,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:46:00,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:00,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:46:00,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:46:00,818 INFO L87 Difference]: Start difference. First operand 242 states and 531 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 12:46:01,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:01,530 INFO L93 Difference]: Finished difference Result 559 states and 1127 transitions. [2021-08-21 12:46:01,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:46:01,530 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 27 [2021-08-21 12:46:01,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:01,532 INFO L225 Difference]: With dead ends: 559 [2021-08-21 12:46:01,532 INFO L226 Difference]: Without dead ends: 553 [2021-08-21 12:46:01,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 615.3ms TimeCoverageRelationStatistics Valid=368, Invalid=1702, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 12:46:01,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-08-21 12:46:01,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 234. [2021-08-21 12:46:01,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.2060085836909873) internal successors, (514), 233 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 514 transitions. [2021-08-21 12:46:01,542 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 514 transitions. Word has length 27 [2021-08-21 12:46:01,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:01,542 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 514 transitions. [2021-08-21 12:46:01,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 12:46:01,542 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 514 transitions. [2021-08-21 12:46:01,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:46:01,542 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:01,542 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:01,567 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 12:46:01,767 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 12:46:01,767 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:01,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:01,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1006035635, now seen corresponding path program 12 times [2021-08-21 12:46:01,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:01,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247901427] [2021-08-21 12:46:01,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:01,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:01,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:01,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247901427] [2021-08-21 12:46:01,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247901427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:01,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199202273] [2021-08-21 12:46:01,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:46:01,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:01,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:01,908 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 12:46:01,909 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 12:46:02,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:46:02,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:02,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:46:02,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:02,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199202273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:02,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:02,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-21 12:46:02,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139773486] [2021-08-21 12:46:02,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:46:02,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:02,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:46:02,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:46:02,507 INFO L87 Difference]: Start difference. First operand 234 states and 514 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 12:46:03,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:03,164 INFO L93 Difference]: Finished difference Result 976 states and 2009 transitions. [2021-08-21 12:46:03,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:46:03,165 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 27 [2021-08-21 12:46:03,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:03,167 INFO L225 Difference]: With dead ends: 976 [2021-08-21 12:46:03,167 INFO L226 Difference]: Without dead ends: 940 [2021-08-21 12:46:03,168 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 582.0ms TimeCoverageRelationStatistics Valid=488, Invalid=1864, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:46:03,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-08-21 12:46:03,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 311. [2021-08-21 12:46:03,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.229032258064516) internal successors, (691), 310 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:03,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 691 transitions. [2021-08-21 12:46:03,176 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 691 transitions. Word has length 27 [2021-08-21 12:46:03,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:03,176 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 691 transitions. [2021-08-21 12:46:03,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 12:46:03,176 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 691 transitions. [2021-08-21 12:46:03,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:46:03,177 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:03,177 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:03,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:03,388 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 12:46:03,388 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:03,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:03,388 INFO L82 PathProgramCache]: Analyzing trace with hash 275669725, now seen corresponding path program 13 times [2021-08-21 12:46:03,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:03,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457120777] [2021-08-21 12:46:03,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:03,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:03,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:03,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457120777] [2021-08-21 12:46:03,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457120777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:03,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130431730] [2021-08-21 12:46:03,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:46:03,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:03,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:03,511 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 12:46:03,512 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 12:46:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:03,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:46:03,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:04,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130431730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:04,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:04,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-21 12:46:04,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565785209] [2021-08-21 12:46:04,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:46:04,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:04,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:46:04,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:46:04,137 INFO L87 Difference]: Start difference. First operand 311 states and 691 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 12:46:04,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:04,890 INFO L93 Difference]: Finished difference Result 802 states and 1701 transitions. [2021-08-21 12:46:04,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 12:46:04,890 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 27 [2021-08-21 12:46:04,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:04,893 INFO L225 Difference]: With dead ends: 802 [2021-08-21 12:46:04,893 INFO L226 Difference]: Without dead ends: 794 [2021-08-21 12:46:04,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 659.4ms TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 12:46:04,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-08-21 12:46:04,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 259. [2021-08-21 12:46:04,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.182170542635659) internal successors, (563), 258 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:04,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 563 transitions. [2021-08-21 12:46:04,902 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 563 transitions. Word has length 27 [2021-08-21 12:46:04,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:04,902 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 563 transitions. [2021-08-21 12:46:04,902 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 12:46:04,902 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 563 transitions. [2021-08-21 12:46:04,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:46:04,902 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:04,902 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:04,919 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 12:46:05,112 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 12:46:05,113 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:05,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:05,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1973910373, now seen corresponding path program 14 times [2021-08-21 12:46:05,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:05,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968922319] [2021-08-21 12:46:05,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:05,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:05,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:05,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968922319] [2021-08-21 12:46:05,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968922319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:05,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993209883] [2021-08-21 12:46:05,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:46:05,214 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:05,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:05,221 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 12:46:05,222 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 12:46:05,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:46:05,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:05,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 12:46:05,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:05,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993209883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:05,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:05,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:46:05,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182819781] [2021-08-21 12:46:05,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:46:05,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:05,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:46:05,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:46:05,927 INFO L87 Difference]: Start difference. First operand 259 states and 563 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:06,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:06,693 INFO L93 Difference]: Finished difference Result 680 states and 1358 transitions. [2021-08-21 12:46:06,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 12:46:06,694 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:46:06,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:06,695 INFO L225 Difference]: With dead ends: 680 [2021-08-21 12:46:06,696 INFO L226 Difference]: Without dead ends: 638 [2021-08-21 12:46:06,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 701.6ms TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 12:46:06,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-08-21 12:46:06,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 270. [2021-08-21 12:46:06,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.163568773234201) internal successors, (582), 269 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 582 transitions. [2021-08-21 12:46:06,702 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 582 transitions. Word has length 29 [2021-08-21 12:46:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:06,702 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 582 transitions. [2021-08-21 12:46:06,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:06,702 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 582 transitions. [2021-08-21 12:46:06,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:46:06,703 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:06,703 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:06,720 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 12:46:06,920 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 12:46:06,920 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:06,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:06,920 INFO L82 PathProgramCache]: Analyzing trace with hash 592333205, now seen corresponding path program 15 times [2021-08-21 12:46:06,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:06,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216026868] [2021-08-21 12:46:06,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:06,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:06,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:06,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216026868] [2021-08-21 12:46:06,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216026868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:06,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166620755] [2021-08-21 12:46:06,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:46:06,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:06,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:06,993 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 12:46:06,993 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 12:46:07,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:46:07,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:07,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:46:07,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:07,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166620755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:07,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:07,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13] total 19 [2021-08-21 12:46:07,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306479583] [2021-08-21 12:46:07,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:46:07,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:07,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:46:07,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:46:07,682 INFO L87 Difference]: Start difference. First operand 270 states and 582 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:08,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:08,763 INFO L93 Difference]: Finished difference Result 543 states and 1104 transitions. [2021-08-21 12:46:08,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 12:46:08,763 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:46:08,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:08,765 INFO L225 Difference]: With dead ends: 543 [2021-08-21 12:46:08,765 INFO L226 Difference]: Without dead ends: 539 [2021-08-21 12:46:08,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 959.0ms TimeCoverageRelationStatistics Valid=1015, Invalid=3145, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 12:46:08,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-08-21 12:46:08,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 270. [2021-08-21 12:46:08,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.159851301115242) internal successors, (581), 269 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:08,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 581 transitions. [2021-08-21 12:46:08,770 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 581 transitions. Word has length 29 [2021-08-21 12:46:08,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:08,771 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 581 transitions. [2021-08-21 12:46:08,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:08,771 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 581 transitions. [2021-08-21 12:46:08,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:46:08,771 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:08,771 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:08,789 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 12:46:08,984 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 12:46:08,985 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:08,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:08,985 INFO L82 PathProgramCache]: Analyzing trace with hash 524451993, now seen corresponding path program 16 times [2021-08-21 12:46:08,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:08,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601332829] [2021-08-21 12:46:08,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:08,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:09,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:09,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601332829] [2021-08-21 12:46:09,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601332829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:09,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687225197] [2021-08-21 12:46:09,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:46:09,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:09,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:09,073 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 12:46:09,074 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 12:46:09,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:46:09,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:09,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:46:09,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:09,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687225197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:09,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:09,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:46:09,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156773823] [2021-08-21 12:46:09,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:46:09,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:09,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:46:09,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:46:09,604 INFO L87 Difference]: Start difference. First operand 270 states and 581 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:09,644 INFO L93 Difference]: Finished difference Result 492 states and 1028 transitions. [2021-08-21 12:46:09,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:46:09,644 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:46:09,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:09,646 INFO L225 Difference]: With dead ends: 492 [2021-08-21 12:46:09,646 INFO L226 Difference]: Without dead ends: 453 [2021-08-21 12:46:09,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:46:09,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-08-21 12:46:09,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 337. [2021-08-21 12:46:09,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.1845238095238093) internal successors, (734), 336 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:09,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 734 transitions. [2021-08-21 12:46:09,651 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 734 transitions. Word has length 31 [2021-08-21 12:46:09,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:09,651 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 734 transitions. [2021-08-21 12:46:09,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:09,651 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 734 transitions. [2021-08-21 12:46:09,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:46:09,652 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:09,652 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:09,672 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 12:46:09,868 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 12:46:09,869 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:09,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:09,869 INFO L82 PathProgramCache]: Analyzing trace with hash -2075385877, now seen corresponding path program 17 times [2021-08-21 12:46:09,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:09,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391250554] [2021-08-21 12:46:09,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:09,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:10,065 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:10,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:10,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391250554] [2021-08-21 12:46:10,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391250554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:10,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733010339] [2021-08-21 12:46:10,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:46:10,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:10,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:10,067 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 12:46:10,067 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 12:46:10,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:46:10,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:10,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:46:10,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:10,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733010339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:10,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:10,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-08-21 12:46:10,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759477481] [2021-08-21 12:46:10,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 12:46:10,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:10,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 12:46:10,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:46:10,851 INFO L87 Difference]: Start difference. First operand 337 states and 734 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:11,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:11,901 INFO L93 Difference]: Finished difference Result 772 states and 1552 transitions. [2021-08-21 12:46:11,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 12:46:11,901 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:46:11,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:11,905 INFO L225 Difference]: With dead ends: 772 [2021-08-21 12:46:11,905 INFO L226 Difference]: Without dead ends: 766 [2021-08-21 12:46:11,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 883.3ms TimeCoverageRelationStatistics Valid=490, Invalid=2816, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 12:46:11,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-08-21 12:46:11,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 328. [2021-08-21 12:46:11,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.2110091743119265) internal successors, (723), 327 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:11,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 723 transitions. [2021-08-21 12:46:11,912 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 723 transitions. Word has length 31 [2021-08-21 12:46:11,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:11,912 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 723 transitions. [2021-08-21 12:46:11,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:11,912 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 723 transitions. [2021-08-21 12:46:11,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:46:11,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:11,913 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:11,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:12,129 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 12:46:12,129 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:12,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:12,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1140769135, now seen corresponding path program 18 times [2021-08-21 12:46:12,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:12,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339064926] [2021-08-21 12:46:12,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:12,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:12,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:12,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:12,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339064926] [2021-08-21 12:46:12,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339064926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:12,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772127514] [2021-08-21 12:46:12,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:46:12,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:12,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:12,291 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 12:46:12,291 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 12:46:12,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:46:12,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:12,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:46:12,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:13,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772127514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:13,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:13,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-21 12:46:13,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272022964] [2021-08-21 12:46:13,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:46:13,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:13,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:46:13,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:46:13,129 INFO L87 Difference]: Start difference. First operand 328 states and 723 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:14,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:14,275 INFO L93 Difference]: Finished difference Result 1342 states and 2716 transitions. [2021-08-21 12:46:14,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 12:46:14,276 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:46:14,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:14,279 INFO L225 Difference]: With dead ends: 1342 [2021-08-21 12:46:14,279 INFO L226 Difference]: Without dead ends: 1318 [2021-08-21 12:46:14,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 920.9ms TimeCoverageRelationStatistics Valid=720, Invalid=3312, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 12:46:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-08-21 12:46:14,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 404. [2021-08-21 12:46:14,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.2531017369727047) internal successors, (908), 403 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:14,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 908 transitions. [2021-08-21 12:46:14,289 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 908 transitions. Word has length 31 [2021-08-21 12:46:14,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:14,289 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 908 transitions. [2021-08-21 12:46:14,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:14,289 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 908 transitions. [2021-08-21 12:46:14,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:46:14,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:14,290 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:14,310 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 12:46:14,508 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 12:46:14,508 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:14,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:14,508 INFO L82 PathProgramCache]: Analyzing trace with hash 410403225, now seen corresponding path program 19 times [2021-08-21 12:46:14,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:14,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239046852] [2021-08-21 12:46:14,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:14,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:14,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:14,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239046852] [2021-08-21 12:46:14,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239046852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:14,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354751315] [2021-08-21 12:46:14,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:46:14,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:14,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:14,635 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 12:46:14,636 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 12:46:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:15,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:46:15,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:15,529 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:15,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354751315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:15,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:15,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-08-21 12:46:15,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447841223] [2021-08-21 12:46:15,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:46:15,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:15,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:46:15,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:46:15,531 INFO L87 Difference]: Start difference. First operand 404 states and 908 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:16,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:16,565 INFO L93 Difference]: Finished difference Result 1094 states and 2288 transitions. [2021-08-21 12:46:16,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:46:16,565 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:46:16,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:16,568 INFO L225 Difference]: With dead ends: 1094 [2021-08-21 12:46:16,568 INFO L226 Difference]: Without dead ends: 1090 [2021-08-21 12:46:16,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 857.6ms TimeCoverageRelationStatistics Valid=599, Invalid=3061, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 12:46:16,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-08-21 12:46:16,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 333. [2021-08-21 12:46:16,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.2198795180722892) internal successors, (737), 332 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:16,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 737 transitions. [2021-08-21 12:46:16,576 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 737 transitions. Word has length 31 [2021-08-21 12:46:16,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:16,576 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 737 transitions. [2021-08-21 12:46:16,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:16,576 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 737 transitions. [2021-08-21 12:46:16,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:46:16,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:16,577 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:16,596 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 12:46:16,800 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 12:46:16,801 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:16,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:16,801 INFO L82 PathProgramCache]: Analyzing trace with hash 33558515, now seen corresponding path program 20 times [2021-08-21 12:46:16,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:16,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531911568] [2021-08-21 12:46:16,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:16,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:16,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:16,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531911568] [2021-08-21 12:46:16,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531911568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:16,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153593258] [2021-08-21 12:46:16,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:46:16,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:16,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:16,944 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 12:46:16,968 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 12:46:17,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:46:17,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:17,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:46:17,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:17,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153593258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:17,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:17,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-08-21 12:46:17,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898149365] [2021-08-21 12:46:17,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 12:46:17,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:17,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 12:46:17,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:46:17,857 INFO L87 Difference]: Start difference. First operand 333 states and 737 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:18,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:18,783 INFO L93 Difference]: Finished difference Result 1727 states and 3552 transitions. [2021-08-21 12:46:18,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 12:46:18,784 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:46:18,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:18,788 INFO L225 Difference]: With dead ends: 1727 [2021-08-21 12:46:18,788 INFO L226 Difference]: Without dead ends: 1631 [2021-08-21 12:46:18,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 817.4ms TimeCoverageRelationStatistics Valid=702, Invalid=2958, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 12:46:18,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-08-21 12:46:18,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 419. [2021-08-21 12:46:18,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.229665071770335) internal successors, (932), 418 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:18,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 932 transitions. [2021-08-21 12:46:18,797 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 932 transitions. Word has length 31 [2021-08-21 12:46:18,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:18,798 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 932 transitions. [2021-08-21 12:46:18,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:18,798 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 932 transitions. [2021-08-21 12:46:18,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:46:18,798 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:18,798 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:18,822 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 12:46:19,013 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 12:46:19,013 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:19,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:19,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1802444585, now seen corresponding path program 21 times [2021-08-21 12:46:19,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:19,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224534984] [2021-08-21 12:46:19,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:19,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:19,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:19,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224534984] [2021-08-21 12:46:19,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224534984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:19,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637805866] [2021-08-21 12:46:19,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:46:19,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:19,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:19,112 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 12:46:19,114 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 12:46:19,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:46:19,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:19,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 12:46:19,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:20,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637805866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:20,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:20,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-08-21 12:46:20,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324938390] [2021-08-21 12:46:20,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:46:20,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:20,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:46:20,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:46:20,088 INFO L87 Difference]: Start difference. First operand 419 states and 932 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:21,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:21,286 INFO L93 Difference]: Finished difference Result 1314 states and 2779 transitions. [2021-08-21 12:46:21,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 12:46:21,286 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:46:21,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:21,290 INFO L225 Difference]: With dead ends: 1314 [2021-08-21 12:46:21,290 INFO L226 Difference]: Without dead ends: 1310 [2021-08-21 12:46:21,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 1009.0ms TimeCoverageRelationStatistics Valid=1021, Invalid=3535, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 12:46:21,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-08-21 12:46:21,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 563. [2021-08-21 12:46:21,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.314946619217082) internal successors, (1301), 562 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 12:46:21,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1301 transitions. [2021-08-21 12:46:21,301 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1301 transitions. Word has length 31 [2021-08-21 12:46:21,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:21,301 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 1301 transitions. [2021-08-21 12:46:21,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:21,301 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1301 transitions. [2021-08-21 12:46:21,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:46:21,302 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:21,302 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:21,321 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 12:46:21,515 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 12:46:21,515 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:21,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:21,516 INFO L82 PathProgramCache]: Analyzing trace with hash 986733015, now seen corresponding path program 22 times [2021-08-21 12:46:21,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:21,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289069124] [2021-08-21 12:46:21,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:21,516 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:21,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:21,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:21,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289069124] [2021-08-21 12:46:21,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289069124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:21,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048027474] [2021-08-21 12:46:21,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:46:21,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:21,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:21,633 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 12:46:21,634 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 12:46:22,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:46:22,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:22,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:46:22,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:22,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048027474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:22,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:22,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-21 12:46:22,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973794674] [2021-08-21 12:46:22,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:46:22,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:22,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:46:22,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:46:22,678 INFO L87 Difference]: Start difference. First operand 563 states and 1301 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:23,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:23,806 INFO L93 Difference]: Finished difference Result 1171 states and 2456 transitions. [2021-08-21 12:46:23,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 12:46:23,806 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:46:23,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:23,809 INFO L225 Difference]: With dead ends: 1171 [2021-08-21 12:46:23,809 INFO L226 Difference]: Without dead ends: 1099 [2021-08-21 12:46:23,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 997.3ms TimeCoverageRelationStatistics Valid=1404, Invalid=3998, Unknown=0, NotChecked=0, Total=5402 [2021-08-21 12:46:23,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-08-21 12:46:23,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 572. [2021-08-21 12:46:23,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.3012259194395797) internal successors, (1314), 571 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:23,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1314 transitions. [2021-08-21 12:46:23,818 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1314 transitions. Word has length 33 [2021-08-21 12:46:23,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:23,818 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 1314 transitions. [2021-08-21 12:46:23,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:23,818 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1314 transitions. [2021-08-21 12:46:23,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:46:23,819 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:23,819 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:23,837 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 12:46:24,034 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 12:46:24,035 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:24,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:24,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1374694123, now seen corresponding path program 23 times [2021-08-21 12:46:24,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:24,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627735130] [2021-08-21 12:46:24,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:24,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:24,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:24,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627735130] [2021-08-21 12:46:24,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627735130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:24,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450296827] [2021-08-21 12:46:24,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:46:24,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:24,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:24,129 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 12:46:24,148 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 12:46:24,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:46:24,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:24,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:46:24,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:25,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450296827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:25,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:25,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-08-21 12:46:25,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015460750] [2021-08-21 12:46:25,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:46:25,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:25,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:46:25,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:46:25,185 INFO L87 Difference]: Start difference. First operand 572 states and 1314 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:26,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:26,711 INFO L93 Difference]: Finished difference Result 984 states and 2110 transitions. [2021-08-21 12:46:26,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-21 12:46:26,711 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:46:26,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:26,714 INFO L225 Difference]: With dead ends: 984 [2021-08-21 12:46:26,714 INFO L226 Difference]: Without dead ends: 980 [2021-08-21 12:46:26,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2577 ImplicationChecksByTransitivity, 1394.6ms TimeCoverageRelationStatistics Valid=1834, Invalid=5822, Unknown=0, NotChecked=0, Total=7656 [2021-08-21 12:46:26,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-08-21 12:46:26,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 572. [2021-08-21 12:46:26,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.2994746059544657) internal successors, (1313), 571 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:26,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1313 transitions. [2021-08-21 12:46:26,723 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1313 transitions. Word has length 33 [2021-08-21 12:46:26,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:26,723 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 1313 transitions. [2021-08-21 12:46:26,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:26,723 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1313 transitions. [2021-08-21 12:46:26,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:46:26,724 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:26,724 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:26,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-21 12:46:26,928 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 12:46:26,928 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:26,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:26,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1860569387, now seen corresponding path program 24 times [2021-08-21 12:46:26,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:26,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705930751] [2021-08-21 12:46:26,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:26,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:27,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:27,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705930751] [2021-08-21 12:46:27,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705930751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:27,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120847850] [2021-08-21 12:46:27,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:46:27,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:27,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:27,025 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 12:46:27,048 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 12:46:27,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:46:27,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:27,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:46:27,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:27,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120847850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:27,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:27,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 12 [2021-08-21 12:46:27,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830132426] [2021-08-21 12:46:27,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:46:27,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:27,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:46:27,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:46:27,930 INFO L87 Difference]: Start difference. First operand 572 states and 1313 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:28,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:28,054 INFO L93 Difference]: Finished difference Result 950 states and 2099 transitions. [2021-08-21 12:46:28,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:46:28,055 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:46:28,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:28,066 INFO L225 Difference]: With dead ends: 950 [2021-08-21 12:46:28,066 INFO L226 Difference]: Without dead ends: 896 [2021-08-21 12:46:28,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:46:28,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-08-21 12:46:28,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 724. [2021-08-21 12:46:28,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.336099585062241) internal successors, (1689), 723 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:28,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1689 transitions. [2021-08-21 12:46:28,080 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1689 transitions. Word has length 35 [2021-08-21 12:46:28,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:28,080 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 1689 transitions. [2021-08-21 12:46:28,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:28,081 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1689 transitions. [2021-08-21 12:46:28,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:46:28,082 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:28,082 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:28,101 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 12:46:28,299 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 12:46:28,299 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:28,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:28,300 INFO L82 PathProgramCache]: Analyzing trace with hash 905400875, now seen corresponding path program 25 times [2021-08-21 12:46:28,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:28,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150305247] [2021-08-21 12:46:28,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:28,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:28,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:28,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150305247] [2021-08-21 12:46:28,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150305247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:28,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389562696] [2021-08-21 12:46:28,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:46:28,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:28,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:28,524 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 12:46:28,524 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 12:46:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:29,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 12:46:29,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:29,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389562696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:29,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:29,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-08-21 12:46:29,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860719771] [2021-08-21 12:46:29,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:46:29,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:29,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:46:29,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:46:29,671 INFO L87 Difference]: Start difference. First operand 724 states and 1689 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:30,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:30,450 INFO L93 Difference]: Finished difference Result 2030 states and 4301 transitions. [2021-08-21 12:46:30,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:46:30,450 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:46:30,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:30,456 INFO L225 Difference]: With dead ends: 2030 [2021-08-21 12:46:30,456 INFO L226 Difference]: Without dead ends: 2000 [2021-08-21 12:46:30,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 650.8ms TimeCoverageRelationStatistics Valid=479, Invalid=2277, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 12:46:30,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-08-21 12:46:30,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 827. [2021-08-21 12:46:30,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 2.3389830508474576) internal successors, (1932), 826 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1932 transitions. [2021-08-21 12:46:30,469 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1932 transitions. Word has length 35 [2021-08-21 12:46:30,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:30,469 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1932 transitions. [2021-08-21 12:46:30,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:30,469 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1932 transitions. [2021-08-21 12:46:30,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:46:30,470 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:30,470 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:30,488 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 12:46:30,678 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 12:46:30,679 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:30,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:30,679 INFO L82 PathProgramCache]: Analyzing trace with hash 175034965, now seen corresponding path program 26 times [2021-08-21 12:46:30,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:30,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934814318] [2021-08-21 12:46:30,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:30,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:30,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:30,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934814318] [2021-08-21 12:46:30,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934814318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:30,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140720227] [2021-08-21 12:46:30,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:46:30,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:30,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:30,844 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 12:46:30,845 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 12:46:31,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:46:31,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:31,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 12:46:31,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:32,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140720227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:32,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:32,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-08-21 12:46:32,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299988820] [2021-08-21 12:46:32,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:46:32,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:32,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:46:32,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:46:32,032 INFO L87 Difference]: Start difference. First operand 827 states and 1932 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:33,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:33,520 INFO L93 Difference]: Finished difference Result 1883 states and 4107 transitions. [2021-08-21 12:46:33,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 12:46:33,521 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:46:33,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:33,526 INFO L225 Difference]: With dead ends: 1883 [2021-08-21 12:46:33,526 INFO L226 Difference]: Without dead ends: 1879 [2021-08-21 12:46:33,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 1199.3ms TimeCoverageRelationStatistics Valid=761, Invalid=4495, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 12:46:33,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2021-08-21 12:46:33,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 806. [2021-08-21 12:46:33,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 2.3354037267080745) internal successors, (1880), 805 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:33,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1880 transitions. [2021-08-21 12:46:33,539 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1880 transitions. Word has length 35 [2021-08-21 12:46:33,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:33,540 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 1880 transitions. [2021-08-21 12:46:33,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:33,540 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1880 transitions. [2021-08-21 12:46:33,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:46:33,541 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:33,541 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:33,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:33,759 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 12:46:33,759 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:33,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:33,759 INFO L82 PathProgramCache]: Analyzing trace with hash -247320401, now seen corresponding path program 27 times [2021-08-21 12:46:33,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:33,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959837690] [2021-08-21 12:46:33,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:33,759 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:33,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:33,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959837690] [2021-08-21 12:46:33,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959837690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:33,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218383349] [2021-08-21 12:46:33,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:46:33,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:33,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:33,929 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 12:46:33,930 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 12:46:34,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 12:46:34,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:34,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:46:34,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:35,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218383349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:35,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:35,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-21 12:46:35,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837975887] [2021-08-21 12:46:35,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:46:35,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:35,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:46:35,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:46:35,136 INFO L87 Difference]: Start difference. First operand 806 states and 1880 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:36,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:36,831 INFO L93 Difference]: Finished difference Result 2852 states and 5980 transitions. [2021-08-21 12:46:36,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 12:46:36,831 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:46:36,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:36,839 INFO L225 Difference]: With dead ends: 2852 [2021-08-21 12:46:36,839 INFO L226 Difference]: Without dead ends: 2756 [2021-08-21 12:46:36,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2211 ImplicationChecksByTransitivity, 1275.1ms TimeCoverageRelationStatistics Valid=1231, Invalid=5741, Unknown=0, NotChecked=0, Total=6972 [2021-08-21 12:46:36,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-08-21 12:46:36,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 765. [2021-08-21 12:46:36,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 2.3481675392670156) internal successors, (1794), 764 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:36,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1794 transitions. [2021-08-21 12:46:36,865 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1794 transitions. Word has length 35 [2021-08-21 12:46:36,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:36,865 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 1794 transitions. [2021-08-21 12:46:36,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:36,865 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1794 transitions. [2021-08-21 12:46:36,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:46:36,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:36,883 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:36,933 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 12:46:37,101 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 12:46:37,101 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:37,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:37,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1762753587, now seen corresponding path program 28 times [2021-08-21 12:46:37,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:37,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470593908] [2021-08-21 12:46:37,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:37,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:37,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:37,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470593908] [2021-08-21 12:46:37,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470593908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:37,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524669159] [2021-08-21 12:46:37,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:46:37,320 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:37,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:37,321 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 12:46:37,322 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 12:46:38,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:46:38,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:38,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:46:38,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:38,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524669159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:38,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:38,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-21 12:46:38,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039625135] [2021-08-21 12:46:38,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:46:38,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:38,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:46:38,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:46:38,607 INFO L87 Difference]: Start difference. First operand 765 states and 1794 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:39,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:39,888 INFO L93 Difference]: Finished difference Result 3343 states and 7149 transitions. [2021-08-21 12:46:39,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 12:46:39,888 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:46:39,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:39,894 INFO L225 Difference]: With dead ends: 3343 [2021-08-21 12:46:39,894 INFO L226 Difference]: Without dead ends: 3160 [2021-08-21 12:46:39,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 1135.0ms TimeCoverageRelationStatistics Valid=1137, Invalid=4869, Unknown=0, NotChecked=0, Total=6006 [2021-08-21 12:46:39,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3160 states. [2021-08-21 12:46:39,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3160 to 832. [2021-08-21 12:46:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 2.2803850782190134) internal successors, (1895), 831 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:39,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1895 transitions. [2021-08-21 12:46:39,913 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1895 transitions. Word has length 35 [2021-08-21 12:46:39,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:39,913 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 1895 transitions. [2021-08-21 12:46:39,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:39,913 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1895 transitions. [2021-08-21 12:46:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:46:39,914 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:39,914 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:39,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-21 12:46:40,122 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 12:46:40,122 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:40,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:40,122 INFO L82 PathProgramCache]: Analyzing trace with hash 674574509, now seen corresponding path program 29 times [2021-08-21 12:46:40,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:40,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636066077] [2021-08-21 12:46:40,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:40,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:40,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:40,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636066077] [2021-08-21 12:46:40,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636066077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:40,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365133053] [2021-08-21 12:46:40,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:46:40,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:40,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:40,223 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 12:46:40,246 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 12:46:41,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:46:41,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:41,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:46:41,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:41,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365133053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:41,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:41,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2021-08-21 12:46:41,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664808334] [2021-08-21 12:46:41,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 12:46:41,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:41,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 12:46:41,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:46:41,561 INFO L87 Difference]: Start difference. First operand 832 states and 1895 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:43,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:43,285 INFO L93 Difference]: Finished difference Result 2247 states and 4845 transitions. [2021-08-21 12:46:43,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-08-21 12:46:43,286 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:46:43,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:43,290 INFO L225 Difference]: With dead ends: 2247 [2021-08-21 12:46:43,290 INFO L226 Difference]: Without dead ends: 2243 [2021-08-21 12:46:43,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 1487.3ms TimeCoverageRelationStatistics Valid=1854, Invalid=6518, Unknown=0, NotChecked=0, Total=8372 [2021-08-21 12:46:43,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2243 states. [2021-08-21 12:46:43,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2243 to 890. [2021-08-21 12:46:43,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 2.329583802024747) internal successors, (2071), 889 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:43,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 2071 transitions. [2021-08-21 12:46:43,307 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 2071 transitions. Word has length 35 [2021-08-21 12:46:43,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:43,307 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 2071 transitions. [2021-08-21 12:46:43,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:43,307 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 2071 transitions. [2021-08-21 12:46:43,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:46:43,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:43,309 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:43,329 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 12:46:43,516 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 12:46:43,516 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:43,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:43,516 INFO L82 PathProgramCache]: Analyzing trace with hash 326959379, now seen corresponding path program 30 times [2021-08-21 12:46:43,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:43,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108023567] [2021-08-21 12:46:43,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:43,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:43,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:43,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108023567] [2021-08-21 12:46:43,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108023567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:43,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50763309] [2021-08-21 12:46:43,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:46:43,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:43,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:43,668 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 12:46:43,669 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 12:46:44,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:46:44,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:44,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 12:46:44,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:45,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50763309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:45,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:45,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-08-21 12:46:45,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444820182] [2021-08-21 12:46:45,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 12:46:45,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:45,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 12:46:45,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:46:45,066 INFO L87 Difference]: Start difference. First operand 890 states and 2071 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:46,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:46,523 INFO L93 Difference]: Finished difference Result 1701 states and 3618 transitions. [2021-08-21 12:46:46,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 12:46:46,523 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:46:46,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:46,526 INFO L225 Difference]: With dead ends: 1701 [2021-08-21 12:46:46,526 INFO L226 Difference]: Without dead ends: 1593 [2021-08-21 12:46:46,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2584 ImplicationChecksByTransitivity, 1366.8ms TimeCoverageRelationStatistics Valid=2214, Invalid=6342, Unknown=0, NotChecked=0, Total=8556 [2021-08-21 12:46:46,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-08-21 12:46:46,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 897. [2021-08-21 12:46:46,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 2.3191964285714284) internal successors, (2078), 896 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:46,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 2078 transitions. [2021-08-21 12:46:46,539 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 2078 transitions. Word has length 37 [2021-08-21 12:46:46,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:46,540 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 2078 transitions. [2021-08-21 12:46:46,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:46,540 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 2078 transitions. [2021-08-21 12:46:46,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:46:46,541 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:46,541 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:46,560 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 12:46:46,749 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 12:46:46,749 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:46,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:46,749 INFO L82 PathProgramCache]: Analyzing trace with hash -177098347, now seen corresponding path program 31 times [2021-08-21 12:46:46,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:46,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315700203] [2021-08-21 12:46:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:46,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:46,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:46,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315700203] [2021-08-21 12:46:46,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315700203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:46,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099635420] [2021-08-21 12:46:46,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:46:46,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:46,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:46,845 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 12:46:46,846 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 12:46:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:47,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:46:47,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:48,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099635420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:48,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:48,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2021-08-21 12:46:48,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851691427] [2021-08-21 12:46:48,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:46:48,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:48,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:46:48,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:46:48,214 INFO L87 Difference]: Start difference. First operand 897 states and 2078 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:49,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:49,630 INFO L93 Difference]: Finished difference Result 1393 states and 3038 transitions. [2021-08-21 12:46:49,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 12:46:49,630 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:46:49,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:49,633 INFO L225 Difference]: With dead ends: 1393 [2021-08-21 12:46:49,633 INFO L226 Difference]: Without dead ends: 1389 [2021-08-21 12:46:49,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 1317.1ms TimeCoverageRelationStatistics Valid=1742, Invalid=5568, Unknown=0, NotChecked=0, Total=7310 [2021-08-21 12:46:49,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2021-08-21 12:46:49,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 877. [2021-08-21 12:46:49,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 2.3253424657534247) internal successors, (2037), 876 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:49,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2037 transitions. [2021-08-21 12:46:49,645 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2037 transitions. Word has length 37 [2021-08-21 12:46:49,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:49,645 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 2037 transitions. [2021-08-21 12:46:49,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:49,645 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2037 transitions. [2021-08-21 12:46:49,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:46:49,646 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:49,646 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:49,664 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 12:46:49,853 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 12:46:49,853 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:49,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:49,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1717152663, now seen corresponding path program 32 times [2021-08-21 12:46:49,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:49,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015746876] [2021-08-21 12:46:49,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:49,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:46:49,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:49,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015746876] [2021-08-21 12:46:49,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015746876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:49,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919717259] [2021-08-21 12:46:49,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:46:49,957 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:49,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:49,961 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 12:46:49,961 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 12:46:50,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:46:50,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:50,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:46:50,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:51,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919717259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:51,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:51,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2021-08-21 12:46:51,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068888712] [2021-08-21 12:46:51,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 12:46:51,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:51,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 12:46:51,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:46:51,429 INFO L87 Difference]: Start difference. First operand 877 states and 2037 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:52,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:52,660 INFO L93 Difference]: Finished difference Result 2246 states and 4900 transitions. [2021-08-21 12:46:52,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 12:46:52,660 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:46:52,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:52,664 INFO L225 Difference]: With dead ends: 2246 [2021-08-21 12:46:52,664 INFO L226 Difference]: Without dead ends: 2237 [2021-08-21 12:46:52,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 973.5ms TimeCoverageRelationStatistics Valid=894, Invalid=3528, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 12:46:52,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2021-08-21 12:46:52,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 1417. [2021-08-21 12:46:52,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1416 states have (on average 2.3834745762711864) internal successors, (3375), 1416 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:52,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 3375 transitions. [2021-08-21 12:46:52,683 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 3375 transitions. Word has length 37 [2021-08-21 12:46:52,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:52,683 INFO L470 AbstractCegarLoop]: Abstraction has 1417 states and 3375 transitions. [2021-08-21 12:46:52,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:52,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 3375 transitions. [2021-08-21 12:46:52,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:46:52,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:52,685 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:52,711 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 12:46:52,897 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 12:46:52,898 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:52,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:52,898 INFO L82 PathProgramCache]: Analyzing trace with hash -247873775, now seen corresponding path program 33 times [2021-08-21 12:46:52,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:52,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019317699] [2021-08-21 12:46:52,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:52,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:53,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:53,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019317699] [2021-08-21 12:46:53,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019317699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:53,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363460629] [2021-08-21 12:46:53,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:46:53,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:53,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:53,027 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 12:46:53,027 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 12:46:53,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:46:53,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:53,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:46:53,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:54,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363460629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:54,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:54,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 15 [2021-08-21 12:46:54,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633543389] [2021-08-21 12:46:54,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:46:54,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:54,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:46:54,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:46:54,277 INFO L87 Difference]: Start difference. First operand 1417 states and 3375 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 12:46:54,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:54,403 INFO L93 Difference]: Finished difference Result 2089 states and 4899 transitions. [2021-08-21 12:46:54,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:46:54,404 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 39 [2021-08-21 12:46:54,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:54,407 INFO L225 Difference]: With dead ends: 2089 [2021-08-21 12:46:54,407 INFO L226 Difference]: Without dead ends: 2032 [2021-08-21 12:46:54,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:46:54,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2021-08-21 12:46:54,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 1760. [2021-08-21 12:46:54,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1759 states have (on average 2.4178510517339395) internal successors, (4253), 1759 states have internal predecessors, (4253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:54,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 4253 transitions. [2021-08-21 12:46:54,439 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 4253 transitions. Word has length 39 [2021-08-21 12:46:54,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:54,439 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 4253 transitions. [2021-08-21 12:46:54,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 12:46:54,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 4253 transitions. [2021-08-21 12:46:54,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:46:54,441 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:54,441 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:54,460 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 12:46:54,647 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 12:46:54,648 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:54,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:54,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1725109521, now seen corresponding path program 34 times [2021-08-21 12:46:54,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:54,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761565820] [2021-08-21 12:46:54,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:54,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:54,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:54,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761565820] [2021-08-21 12:46:54,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761565820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:54,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65754395] [2021-08-21 12:46:54,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:46:54,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:54,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:54,837 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 12:46:54,838 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 12:46:55,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:46:55,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:55,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:46:55,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:56,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65754395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:56,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:56,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 29 [2021-08-21 12:46:56,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803227201] [2021-08-21 12:46:56,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:46:56,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:56,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:46:56,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:46:56,453 INFO L87 Difference]: Start difference. First operand 1760 states and 4253 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:58,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:58,608 INFO L93 Difference]: Finished difference Result 3244 states and 7341 transitions. [2021-08-21 12:46:58,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-21 12:46:58,608 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:46:58,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:58,614 INFO L225 Difference]: With dead ends: 3244 [2021-08-21 12:46:58,614 INFO L226 Difference]: Without dead ends: 3240 [2021-08-21 12:46:58,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2288 ImplicationChecksByTransitivity, 1560.7ms TimeCoverageRelationStatistics Valid=1013, Invalid=6819, Unknown=0, NotChecked=0, Total=7832 [2021-08-21 12:46:58,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3240 states. [2021-08-21 12:46:58,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3240 to 1846. [2021-08-21 12:46:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1845 states have (on average 2.419512195121951) internal successors, (4464), 1845 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:58,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 4464 transitions. [2021-08-21 12:46:58,641 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 4464 transitions. Word has length 39 [2021-08-21 12:46:58,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:58,641 INFO L470 AbstractCegarLoop]: Abstraction has 1846 states and 4464 transitions. [2021-08-21 12:46:58,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:58,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 4464 transitions. [2021-08-21 12:46:58,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:46:58,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:58,644 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:58,664 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 12:46:58,850 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 12:46:58,850 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:58,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:58,850 INFO L82 PathProgramCache]: Analyzing trace with hash 204691563, now seen corresponding path program 35 times [2021-08-21 12:46:58,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:58,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514255884] [2021-08-21 12:46:58,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:58,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:46:59,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:59,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514255884] [2021-08-21 12:46:59,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514255884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:59,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156693638] [2021-08-21 12:46:59,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:46:59,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:59,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:59,058 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 12:46:59,058 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 12:47:00,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:47:00,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:00,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:47:00,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:00,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156693638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:00,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:00,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18] total 30 [2021-08-21 12:47:00,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167690396] [2021-08-21 12:47:00,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:47:00,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:00,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:47:00,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:47:00,721 INFO L87 Difference]: Start difference. First operand 1846 states and 4464 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:02,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:02,940 INFO L93 Difference]: Finished difference Result 3849 states and 8630 transitions. [2021-08-21 12:47:02,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-21 12:47:02,941 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:47:02,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:02,947 INFO L225 Difference]: With dead ends: 3849 [2021-08-21 12:47:02,947 INFO L226 Difference]: Without dead ends: 3825 [2021-08-21 12:47:02,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2844 ImplicationChecksByTransitivity, 1657.7ms TimeCoverageRelationStatistics Valid=1319, Invalid=7801, Unknown=0, NotChecked=0, Total=9120 [2021-08-21 12:47:02,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3825 states. [2021-08-21 12:47:02,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3825 to 1766. [2021-08-21 12:47:02,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 2.424929178470255) internal successors, (4280), 1765 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:02,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 4280 transitions. [2021-08-21 12:47:02,973 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 4280 transitions. Word has length 39 [2021-08-21 12:47:02,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:02,973 INFO L470 AbstractCegarLoop]: Abstraction has 1766 states and 4280 transitions. [2021-08-21 12:47:02,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:02,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 4280 transitions. [2021-08-21 12:47:02,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:47:02,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:02,976 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:03,012 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 12:47:03,189 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 12:47:03,189 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:03,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:03,189 INFO L82 PathProgramCache]: Analyzing trace with hash 516686699, now seen corresponding path program 36 times [2021-08-21 12:47:03,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:03,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800426709] [2021-08-21 12:47:03,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:03,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:03,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:03,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800426709] [2021-08-21 12:47:03,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800426709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:03,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549483709] [2021-08-21 12:47:03,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:47:03,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:03,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:03,365 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 12:47:03,392 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 12:47:04,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 12:47:04,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:04,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:47:04,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:05,090 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:05,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549483709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:05,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:05,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-08-21 12:47:05,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700108176] [2021-08-21 12:47:05,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 12:47:05,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:05,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 12:47:05,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:47:05,091 INFO L87 Difference]: Start difference. First operand 1766 states and 4280 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:07,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:07,490 INFO L93 Difference]: Finished difference Result 4814 states and 10624 transitions. [2021-08-21 12:47:07,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-08-21 12:47:07,490 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:47:07,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:07,496 INFO L225 Difference]: With dead ends: 4814 [2021-08-21 12:47:07,496 INFO L226 Difference]: Without dead ends: 4766 [2021-08-21 12:47:07,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3567 ImplicationChecksByTransitivity, 1750.9ms TimeCoverageRelationStatistics Valid=1716, Invalid=9204, Unknown=0, NotChecked=0, Total=10920 [2021-08-21 12:47:07,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4766 states. [2021-08-21 12:47:07,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4766 to 1566. [2021-08-21 12:47:07,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 2.4255591054313097) internal successors, (3796), 1565 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:07,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 3796 transitions. [2021-08-21 12:47:07,522 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 3796 transitions. Word has length 39 [2021-08-21 12:47:07,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:07,523 INFO L470 AbstractCegarLoop]: Abstraction has 1566 states and 3796 transitions. [2021-08-21 12:47:07,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:07,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 3796 transitions. [2021-08-21 12:47:07,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:47:07,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:07,524 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:07,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:07,740 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 12:47:07,741 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:07,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:07,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1264787729, now seen corresponding path program 37 times [2021-08-21 12:47:07,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:07,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757125294] [2021-08-21 12:47:07,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:07,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:07,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:07,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757125294] [2021-08-21 12:47:07,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757125294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:07,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564247866] [2021-08-21 12:47:07,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:47:07,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:07,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:07,912 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 12:47:07,913 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 12:47:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:09,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:47:09,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:09,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564247866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:09,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:09,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-08-21 12:47:09,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273311753] [2021-08-21 12:47:09,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 12:47:09,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:09,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 12:47:09,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:47:09,679 INFO L87 Difference]: Start difference. First operand 1566 states and 3796 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:11,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:11,472 INFO L93 Difference]: Finished difference Result 5523 states and 12031 transitions. [2021-08-21 12:47:11,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 12:47:11,473 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:47:11,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:11,479 INFO L225 Difference]: With dead ends: 5523 [2021-08-21 12:47:11,479 INFO L226 Difference]: Without dead ends: 5397 [2021-08-21 12:47:11,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2857 ImplicationChecksByTransitivity, 1474.5ms TimeCoverageRelationStatistics Valid=1522, Invalid=7220, Unknown=0, NotChecked=0, Total=8742 [2021-08-21 12:47:11,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2021-08-21 12:47:11,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 1582. [2021-08-21 12:47:11,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 2.4212523719165087) internal successors, (3828), 1581 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:11,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 3828 transitions. [2021-08-21 12:47:11,507 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 3828 transitions. Word has length 39 [2021-08-21 12:47:11,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:11,507 INFO L470 AbstractCegarLoop]: Abstraction has 1582 states and 3828 transitions. [2021-08-21 12:47:11,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:11,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 3828 transitions. [2021-08-21 12:47:11,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:47:11,508 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:11,509 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:11,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-21 12:47:11,709 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 12:47:11,709 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:11,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:11,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1338513549, now seen corresponding path program 38 times [2021-08-21 12:47:11,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:11,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760976390] [2021-08-21 12:47:11,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:11,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:11,873 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:11,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:11,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760976390] [2021-08-21 12:47:11,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760976390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:11,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295276720] [2021-08-21 12:47:11,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:47:11,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:11,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:11,874 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 12:47:11,876 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 12:47:13,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:47:13,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:13,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:47:13,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:13,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295276720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:13,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:13,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-21 12:47:13,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464457283] [2021-08-21 12:47:13,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:47:13,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:13,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:47:13,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:47:13,703 INFO L87 Difference]: Start difference. First operand 1582 states and 3828 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:15,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:15,730 INFO L93 Difference]: Finished difference Result 5993 states and 13242 transitions. [2021-08-21 12:47:15,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-08-21 12:47:15,730 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:47:15,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:15,737 INFO L225 Difference]: With dead ends: 5993 [2021-08-21 12:47:15,737 INFO L226 Difference]: Without dead ends: 5708 [2021-08-21 12:47:15,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3830 ImplicationChecksByTransitivity, 1721.5ms TimeCoverageRelationStatistics Valid=2308, Invalid=9248, Unknown=0, NotChecked=0, Total=11556 [2021-08-21 12:47:15,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5708 states. [2021-08-21 12:47:15,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5708 to 1758. [2021-08-21 12:47:15,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1757 states have (on average 2.363118952760387) internal successors, (4152), 1757 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:15,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 4152 transitions. [2021-08-21 12:47:15,775 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 4152 transitions. Word has length 39 [2021-08-21 12:47:15,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:15,775 INFO L470 AbstractCegarLoop]: Abstraction has 1758 states and 4152 transitions. [2021-08-21 12:47:15,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:15,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 4152 transitions. [2021-08-21 12:47:15,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:47:15,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:15,777 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:15,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:15,992 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 12:47:15,993 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:15,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:15,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1853554639, now seen corresponding path program 39 times [2021-08-21 12:47:15,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:15,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773683026] [2021-08-21 12:47:15,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:15,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:16,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:16,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773683026] [2021-08-21 12:47:16,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773683026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:16,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963388413] [2021-08-21 12:47:16,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:47:16,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:16,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:16,110 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 12:47:16,110 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 12:47:17,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 12:47:17,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:17,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 12:47:17,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:17,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963388413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:17,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:17,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 28 [2021-08-21 12:47:17,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369605977] [2021-08-21 12:47:17,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:47:17,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:17,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:47:17,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:47:17,979 INFO L87 Difference]: Start difference. First operand 1758 states and 4152 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:20,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:20,360 INFO L93 Difference]: Finished difference Result 3958 states and 8761 transitions. [2021-08-21 12:47:20,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-21 12:47:20,361 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:47:20,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:20,365 INFO L225 Difference]: With dead ends: 3958 [2021-08-21 12:47:20,365 INFO L226 Difference]: Without dead ends: 3954 [2021-08-21 12:47:20,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5275 ImplicationChecksByTransitivity, 2156.9ms TimeCoverageRelationStatistics Valid=3131, Invalid=11149, Unknown=0, NotChecked=0, Total=14280 [2021-08-21 12:47:20,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3954 states. [2021-08-21 12:47:20,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3954 to 1848. [2021-08-21 12:47:20,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 2.3892799133730374) internal successors, (4413), 1847 states have internal predecessors, (4413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:20,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 4413 transitions. [2021-08-21 12:47:20,390 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 4413 transitions. Word has length 39 [2021-08-21 12:47:20,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:20,390 INFO L470 AbstractCegarLoop]: Abstraction has 1848 states and 4413 transitions. [2021-08-21 12:47:20,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:20,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 4413 transitions. [2021-08-21 12:47:20,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:47:20,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:20,393 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:20,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:20,612 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 12:47:20,612 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:20,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:20,613 INFO L82 PathProgramCache]: Analyzing trace with hash 443644495, now seen corresponding path program 40 times [2021-08-21 12:47:20,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:20,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683790603] [2021-08-21 12:47:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:20,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:20,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:20,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683790603] [2021-08-21 12:47:20,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683790603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:20,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179965636] [2021-08-21 12:47:20,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:47:20,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:20,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:20,794 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 12:47:20,794 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 12:47:22,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:47:22,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:22,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:47:22,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:22,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179965636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:22,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:22,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-08-21 12:47:22,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629237462] [2021-08-21 12:47:22,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 12:47:22,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:22,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 12:47:22,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:47:22,724 INFO L87 Difference]: Start difference. First operand 1848 states and 4413 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:24,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:24,776 INFO L93 Difference]: Finished difference Result 3141 states and 7013 transitions. [2021-08-21 12:47:24,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-08-21 12:47:24,776 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 12:47:24,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:24,779 INFO L225 Difference]: With dead ends: 3141 [2021-08-21 12:47:24,779 INFO L226 Difference]: Without dead ends: 2979 [2021-08-21 12:47:24,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4141 ImplicationChecksByTransitivity, 1840.2ms TimeCoverageRelationStatistics Valid=3335, Invalid=9547, Unknown=0, NotChecked=0, Total=12882 [2021-08-21 12:47:24,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2979 states. [2021-08-21 12:47:24,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2979 to 1787. [2021-08-21 12:47:24,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 2.379619260918253) internal successors, (4250), 1786 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:24,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 4250 transitions. [2021-08-21 12:47:24,801 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 4250 transitions. Word has length 41 [2021-08-21 12:47:24,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:24,801 INFO L470 AbstractCegarLoop]: Abstraction has 1787 states and 4250 transitions. [2021-08-21 12:47:24,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:24,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 4250 transitions. [2021-08-21 12:47:24,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:47:24,803 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:24,803 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:24,829 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 12:47:25,023 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 12:47:25,023 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:25,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:25,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1834803435, now seen corresponding path program 41 times [2021-08-21 12:47:25,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:25,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408742380] [2021-08-21 12:47:25,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:25,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:25,129 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:25,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:25,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408742380] [2021-08-21 12:47:25,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408742380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:25,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986583720] [2021-08-21 12:47:25,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:47:25,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:25,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:25,130 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 12:47:25,131 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 12:47:26,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-21 12:47:26,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:26,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:47:26,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:27,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986583720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:27,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:27,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2021-08-21 12:47:27,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274806719] [2021-08-21 12:47:27,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:47:27,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:27,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:47:27,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:47:27,160 INFO L87 Difference]: Start difference. First operand 1787 states and 4250 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:30,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:30,254 INFO L93 Difference]: Finished difference Result 2544 states and 5728 transitions. [2021-08-21 12:47:30,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-08-21 12:47:30,255 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 12:47:30,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:30,264 INFO L225 Difference]: With dead ends: 2544 [2021-08-21 12:47:30,265 INFO L226 Difference]: Without dead ends: 2540 [2021-08-21 12:47:30,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8547 ImplicationChecksByTransitivity, 2834.0ms TimeCoverageRelationStatistics Valid=4969, Invalid=16787, Unknown=0, NotChecked=0, Total=21756 [2021-08-21 12:47:30,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2021-08-21 12:47:30,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 1763. [2021-08-21 12:47:30,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 2.38422247446084) internal successors, (4201), 1762 states have internal predecessors, (4201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:30,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 4201 transitions. [2021-08-21 12:47:30,284 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 4201 transitions. Word has length 41 [2021-08-21 12:47:30,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:30,285 INFO L470 AbstractCegarLoop]: Abstraction has 1763 states and 4201 transitions. [2021-08-21 12:47:30,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:30,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 4201 transitions. [2021-08-21 12:47:30,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:47:30,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:30,291 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:30,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:30,504 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 12:47:30,505 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:30,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:30,505 INFO L82 PathProgramCache]: Analyzing trace with hash 217373005, now seen corresponding path program 42 times [2021-08-21 12:47:30,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:30,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171305130] [2021-08-21 12:47:30,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:30,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:30,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:30,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171305130] [2021-08-21 12:47:30,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171305130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:30,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328794785] [2021-08-21 12:47:30,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:47:30,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:30,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:30,615 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 12:47:30,616 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 12:47:32,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 12:47:32,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:32,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:47:32,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 25 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:32,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328794785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:32,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:32,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2021-08-21 12:47:32,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404590936] [2021-08-21 12:47:32,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:47:32,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:32,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:47:32,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:47:32,359 INFO L87 Difference]: Start difference. First operand 1763 states and 4201 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:32,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:32,519 INFO L93 Difference]: Finished difference Result 2522 states and 5899 transitions. [2021-08-21 12:47:32,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:47:32,520 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:47:32,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:32,522 INFO L225 Difference]: With dead ends: 2522 [2021-08-21 12:47:32,522 INFO L226 Difference]: Without dead ends: 2459 [2021-08-21 12:47:32,522 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 162.3ms TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:47:32,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-08-21 12:47:32,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2136. [2021-08-21 12:47:32,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 2.419672131147541) internal successors, (5166), 2135 states have internal predecessors, (5166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:32,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 5166 transitions. [2021-08-21 12:47:32,544 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 5166 transitions. Word has length 43 [2021-08-21 12:47:32,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:32,544 INFO L470 AbstractCegarLoop]: Abstraction has 2136 states and 5166 transitions. [2021-08-21 12:47:32,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:32,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 5166 transitions. [2021-08-21 12:47:32,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:47:32,547 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:32,547 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:32,567 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 12:47:32,756 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 12:47:32,756 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:32,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:32,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1423537757, now seen corresponding path program 43 times [2021-08-21 12:47:32,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:32,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288662574] [2021-08-21 12:47:32,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:32,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:32,971 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:32,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:32,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288662574] [2021-08-21 12:47:32,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288662574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:32,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181641856] [2021-08-21 12:47:32,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:47:32,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:32,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:32,972 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 12:47:32,973 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 12:47:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:34,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 12:47:34,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:35,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181641856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:35,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:35,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-08-21 12:47:35,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260495681] [2021-08-21 12:47:35,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 12:47:35,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:35,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 12:47:35,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:47:35,073 INFO L87 Difference]: Start difference. First operand 2136 states and 5166 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:38,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:38,158 INFO L93 Difference]: Finished difference Result 5022 states and 11126 transitions. [2021-08-21 12:47:38,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-08-21 12:47:38,159 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:47:38,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:38,165 INFO L225 Difference]: With dead ends: 5022 [2021-08-21 12:47:38,165 INFO L226 Difference]: Without dead ends: 4989 [2021-08-21 12:47:38,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3891 ImplicationChecksByTransitivity, 2074.5ms TimeCoverageRelationStatistics Valid=1461, Invalid=10971, Unknown=0, NotChecked=0, Total=12432 [2021-08-21 12:47:38,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4989 states. [2021-08-21 12:47:38,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4989 to 2409. [2021-08-21 12:47:38,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 2.4210963455149503) internal successors, (5830), 2408 states have internal predecessors, (5830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:38,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 5830 transitions. [2021-08-21 12:47:38,207 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 5830 transitions. Word has length 43 [2021-08-21 12:47:38,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:38,207 INFO L470 AbstractCegarLoop]: Abstraction has 2409 states and 5830 transitions. [2021-08-21 12:47:38,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:38,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 5830 transitions. [2021-08-21 12:47:38,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:47:38,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:38,210 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:38,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-21 12:47:38,419 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 12:47:38,419 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:38,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:38,420 INFO L82 PathProgramCache]: Analyzing trace with hash 2141063629, now seen corresponding path program 44 times [2021-08-21 12:47:38,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:38,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704269653] [2021-08-21 12:47:38,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:38,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:38,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:38,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:38,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704269653] [2021-08-21 12:47:38,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704269653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:38,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151030956] [2021-08-21 12:47:38,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:47:38,608 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:38,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:38,608 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 12:47:38,610 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 12:47:40,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:47:40,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:40,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 12:47:40,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:40,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151030956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:40,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:40,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 32 [2021-08-21 12:47:40,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528272097] [2021-08-21 12:47:40,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 12:47:40,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:40,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 12:47:40,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:47:40,768 INFO L87 Difference]: Start difference. First operand 2409 states and 5830 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:43,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:43,174 INFO L93 Difference]: Finished difference Result 4003 states and 9095 transitions. [2021-08-21 12:47:43,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-21 12:47:43,174 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:47:43,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:43,179 INFO L225 Difference]: With dead ends: 4003 [2021-08-21 12:47:43,179 INFO L226 Difference]: Without dead ends: 3999 [2021-08-21 12:47:43,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2728 ImplicationChecksByTransitivity, 1787.8ms TimeCoverageRelationStatistics Valid=1085, Invalid=8227, Unknown=0, NotChecked=0, Total=9312 [2021-08-21 12:47:43,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3999 states. [2021-08-21 12:47:43,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3999 to 2199. [2021-08-21 12:47:43,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 2198 states have (on average 2.4140127388535033) internal successors, (5306), 2198 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:43,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 5306 transitions. [2021-08-21 12:47:43,206 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 5306 transitions. Word has length 43 [2021-08-21 12:47:43,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:43,206 INFO L470 AbstractCegarLoop]: Abstraction has 2199 states and 5306 transitions. [2021-08-21 12:47:43,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:43,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 5306 transitions. [2021-08-21 12:47:43,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:47:43,208 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:43,208 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:43,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-21 12:47:43,409 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 12:47:43,409 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:43,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:43,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1436059687, now seen corresponding path program 45 times [2021-08-21 12:47:43,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:43,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870127973] [2021-08-21 12:47:43,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:43,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:43,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:43,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870127973] [2021-08-21 12:47:43,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870127973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:43,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793640363] [2021-08-21 12:47:43,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:47:43,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:43,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:43,642 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 12:47:43,655 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 12:47:45,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-21 12:47:45,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:45,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:47:45,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:45,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793640363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:45,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:45,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-08-21 12:47:45,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014321696] [2021-08-21 12:47:45,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:47:45,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:45,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:47:45,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:47:45,856 INFO L87 Difference]: Start difference. First operand 2199 states and 5306 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:48,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:48,912 INFO L93 Difference]: Finished difference Result 5834 states and 12841 transitions. [2021-08-21 12:47:48,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-08-21 12:47:48,913 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:47:48,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:48,919 INFO L225 Difference]: With dead ends: 5834 [2021-08-21 12:47:48,919 INFO L226 Difference]: Without dead ends: 5786 [2021-08-21 12:47:48,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5467 ImplicationChecksByTransitivity, 2260.2ms TimeCoverageRelationStatistics Valid=2247, Invalid=14009, Unknown=0, NotChecked=0, Total=16256 [2021-08-21 12:47:48,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-08-21 12:47:48,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 2287. [2021-08-21 12:47:48,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 2286 states have (on average 2.400262467191601) internal successors, (5487), 2286 states have internal predecessors, (5487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:48,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 5487 transitions. [2021-08-21 12:47:48,952 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 5487 transitions. Word has length 43 [2021-08-21 12:47:48,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:48,952 INFO L470 AbstractCegarLoop]: Abstraction has 2287 states and 5487 transitions. [2021-08-21 12:47:48,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:48,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 5487 transitions. [2021-08-21 12:47:48,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:47:48,954 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:48,954 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:48,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:49,155 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 12:47:49,155 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:49,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:49,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1891175509, now seen corresponding path program 46 times [2021-08-21 12:47:49,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:49,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116265773] [2021-08-21 12:47:49,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:49,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:49,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:49,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116265773] [2021-08-21 12:47:49,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116265773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:49,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551886342] [2021-08-21 12:47:49,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:47:49,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:49,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:49,354 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 12:47:49,356 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 12:47:50,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:47:50,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:50,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:47:50,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:51,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551886342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:51,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:51,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-08-21 12:47:51,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400865281] [2021-08-21 12:47:51,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 12:47:51,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:51,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 12:47:51,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:47:51,656 INFO L87 Difference]: Start difference. First operand 2287 states and 5487 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:54,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:54,362 INFO L93 Difference]: Finished difference Result 7592 states and 16612 transitions. [2021-08-21 12:47:54,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-08-21 12:47:54,363 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:47:54,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:54,371 INFO L225 Difference]: With dead ends: 7592 [2021-08-21 12:47:54,371 INFO L226 Difference]: Without dead ends: 7418 [2021-08-21 12:47:54,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5141 ImplicationChecksByTransitivity, 2277.7ms TimeCoverageRelationStatistics Valid=2370, Invalid=12636, Unknown=0, NotChecked=0, Total=15006 [2021-08-21 12:47:54,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7418 states. [2021-08-21 12:47:54,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7418 to 2165. [2021-08-21 12:47:54,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2165 states, 2164 states have (on average 2.4172828096118297) internal successors, (5231), 2164 states have internal predecessors, (5231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:54,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 5231 transitions. [2021-08-21 12:47:54,409 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 5231 transitions. Word has length 43 [2021-08-21 12:47:54,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:54,409 INFO L470 AbstractCegarLoop]: Abstraction has 2165 states and 5231 transitions. [2021-08-21 12:47:54,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:54,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 5231 transitions. [2021-08-21 12:47:54,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:47:54,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:54,411 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:54,432 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 12:47:54,624 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 12:47:54,624 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:54,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:54,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1382314961, now seen corresponding path program 47 times [2021-08-21 12:47:54,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:54,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321100295] [2021-08-21 12:47:54,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:54,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:54,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:54,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:54,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321100295] [2021-08-21 12:47:54,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321100295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:54,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699543923] [2021-08-21 12:47:54,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:47:54,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:54,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:54,850 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 12:47:54,850 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 12:47:56,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:47:56,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:56,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:47:56,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:57,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699543923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:57,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:57,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-08-21 12:47:57,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047177036] [2021-08-21 12:47:57,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 12:47:57,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:57,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 12:47:57,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:47:57,167 INFO L87 Difference]: Start difference. First operand 2165 states and 5231 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:59,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:59,633 INFO L93 Difference]: Finished difference Result 8056 states and 17505 transitions. [2021-08-21 12:47:59,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-08-21 12:47:59,634 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:47:59,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:59,644 INFO L225 Difference]: With dead ends: 8056 [2021-08-21 12:47:59,645 INFO L226 Difference]: Without dead ends: 7852 [2021-08-21 12:47:59,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5520 ImplicationChecksByTransitivity, 2095.4ms TimeCoverageRelationStatistics Valid=2778, Invalid=12474, Unknown=0, NotChecked=0, Total=15252 [2021-08-21 12:47:59,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7852 states. [2021-08-21 12:47:59,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7852 to 2181. [2021-08-21 12:47:59,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 2.4142201834862385) internal successors, (5263), 2180 states have internal predecessors, (5263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:59,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 5263 transitions. [2021-08-21 12:47:59,723 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 5263 transitions. Word has length 43 [2021-08-21 12:47:59,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:59,723 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 5263 transitions. [2021-08-21 12:47:59,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:59,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 5263 transitions. [2021-08-21 12:47:59,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:47:59,725 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:59,725 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:59,745 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 12:47:59,925 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 12:47:59,925 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:59,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:59,926 INFO L82 PathProgramCache]: Analyzing trace with hash -2112876109, now seen corresponding path program 48 times [2021-08-21 12:47:59,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:59,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486823638] [2021-08-21 12:47:59,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:59,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:59,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:00,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:00,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486823638] [2021-08-21 12:48:00,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486823638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:00,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902868144] [2021-08-21 12:48:00,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:48:00,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:00,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:00,130 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 12:48:00,131 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 12:48:01,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 12:48:01,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:01,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:48:01,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:02,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902868144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:02,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:02,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-21 12:48:02,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469247627] [2021-08-21 12:48:02,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:48:02,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:02,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:48:02,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:48:02,578 INFO L87 Difference]: Start difference. First operand 2181 states and 5263 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:05,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:05,129 INFO L93 Difference]: Finished difference Result 8331 states and 18384 transitions. [2021-08-21 12:48:05,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-08-21 12:48:05,129 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:48:05,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:05,138 INFO L225 Difference]: With dead ends: 8331 [2021-08-21 12:48:05,138 INFO L226 Difference]: Without dead ends: 7923 [2021-08-21 12:48:05,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5800 ImplicationChecksByTransitivity, 2265.3ms TimeCoverageRelationStatistics Valid=3419, Invalid=13611, Unknown=0, NotChecked=0, Total=17030 [2021-08-21 12:48:05,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7923 states. [2021-08-21 12:48:05,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7923 to 2201. [2021-08-21 12:48:05,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2200 states have (on average 2.3536363636363635) internal successors, (5178), 2200 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 5178 transitions. [2021-08-21 12:48:05,184 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 5178 transitions. Word has length 43 [2021-08-21 12:48:05,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:05,185 INFO L470 AbstractCegarLoop]: Abstraction has 2201 states and 5178 transitions. [2021-08-21 12:48:05,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:05,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 5178 transitions. [2021-08-21 12:48:05,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:48:05,187 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:05,187 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:05,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:05,408 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 12:48:05,408 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:05,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:05,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1531415989, now seen corresponding path program 49 times [2021-08-21 12:48:05,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:05,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685437364] [2021-08-21 12:48:05,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:05,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:05,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:05,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685437364] [2021-08-21 12:48:05,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685437364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:05,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840938785] [2021-08-21 12:48:05,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:48:05,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:05,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:05,541 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 12:48:05,568 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 12:48:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:07,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:48:07,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:08,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840938785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:08,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:08,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2021-08-21 12:48:08,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929867191] [2021-08-21 12:48:08,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 12:48:08,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:08,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 12:48:08,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:48:08,108 INFO L87 Difference]: Start difference. First operand 2201 states and 5178 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:11,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:11,389 INFO L93 Difference]: Finished difference Result 4987 states and 10986 transitions. [2021-08-21 12:48:11,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-08-21 12:48:11,389 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:48:11,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:11,396 INFO L225 Difference]: With dead ends: 4987 [2021-08-21 12:48:11,396 INFO L226 Difference]: Without dead ends: 4983 [2021-08-21 12:48:11,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9023 ImplicationChecksByTransitivity, 2986.8ms TimeCoverageRelationStatistics Valid=4987, Invalid=17965, Unknown=0, NotChecked=0, Total=22952 [2021-08-21 12:48:11,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4983 states. [2021-08-21 12:48:11,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4983 to 2275. [2021-08-21 12:48:11,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 2274 states have (on average 2.3790677220756375) internal successors, (5410), 2274 states have internal predecessors, (5410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:11,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 5410 transitions. [2021-08-21 12:48:11,432 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 5410 transitions. Word has length 43 [2021-08-21 12:48:11,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:11,432 INFO L470 AbstractCegarLoop]: Abstraction has 2275 states and 5410 transitions. [2021-08-21 12:48:11,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:11,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 5410 transitions. [2021-08-21 12:48:11,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-21 12:48:11,434 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:11,434 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:11,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:11,641 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 12:48:11,641 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:11,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:11,641 INFO L82 PathProgramCache]: Analyzing trace with hash 289457547, now seen corresponding path program 50 times [2021-08-21 12:48:11,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:11,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798769802] [2021-08-21 12:48:11,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:11,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:11,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:11,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798769802] [2021-08-21 12:48:11,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798769802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:11,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974783896] [2021-08-21 12:48:11,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:48:11,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:11,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:11,831 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 12:48:11,832 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 12:48:13,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:48:13,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:13,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:48:13,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:14,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974783896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:14,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:14,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-08-21 12:48:14,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511755875] [2021-08-21 12:48:14,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 12:48:14,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:14,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 12:48:14,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:48:14,366 INFO L87 Difference]: Start difference. First operand 2275 states and 5410 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:16,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:16,942 INFO L93 Difference]: Finished difference Result 3592 states and 7941 transitions. [2021-08-21 12:48:16,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-08-21 12:48:16,942 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-21 12:48:16,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:16,946 INFO L225 Difference]: With dead ends: 3592 [2021-08-21 12:48:16,946 INFO L226 Difference]: Without dead ends: 3394 [2021-08-21 12:48:16,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6324 ImplicationChecksByTransitivity, 2364.4ms TimeCoverageRelationStatistics Valid=4840, Invalid=13792, Unknown=0, NotChecked=0, Total=18632 [2021-08-21 12:48:16,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3394 states. [2021-08-21 12:48:16,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3394 to 2278. [2021-08-21 12:48:16,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2277 states have (on average 2.3737373737373737) internal successors, (5405), 2277 states have internal predecessors, (5405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 5405 transitions. [2021-08-21 12:48:16,972 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 5405 transitions. Word has length 45 [2021-08-21 12:48:16,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:16,972 INFO L470 AbstractCegarLoop]: Abstraction has 2278 states and 5405 transitions. [2021-08-21 12:48:16,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:16,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 5405 transitions. [2021-08-21 12:48:16,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-21 12:48:16,974 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:16,974 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:16,995 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 12:48:17,175 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 12:48:17,175 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:17,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:17,175 INFO L82 PathProgramCache]: Analyzing trace with hash -2075959915, now seen corresponding path program 51 times [2021-08-21 12:48:17,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:17,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553564566] [2021-08-21 12:48:17,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:17,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:17,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:17,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553564566] [2021-08-21 12:48:17,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553564566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:17,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199727728] [2021-08-21 12:48:17,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:48:17,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:17,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:17,315 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 12:48:17,315 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 12:48:19,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-21 12:48:19,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:19,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:48:19,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:19,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199727728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:19,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:19,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21] total 31 [2021-08-21 12:48:19,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456710139] [2021-08-21 12:48:19,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 12:48:19,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:19,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 12:48:19,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:48:19,882 INFO L87 Difference]: Start difference. First operand 2278 states and 5405 transitions. Second operand has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:24,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:24,315 INFO L93 Difference]: Finished difference Result 3261 states and 7331 transitions. [2021-08-21 12:48:24,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-08-21 12:48:24,315 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-21 12:48:24,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:24,319 INFO L225 Difference]: With dead ends: 3261 [2021-08-21 12:48:24,319 INFO L226 Difference]: Without dead ends: 3257 [2021-08-21 12:48:24,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14117 ImplicationChecksByTransitivity, 4122.2ms TimeCoverageRelationStatistics Valid=7581, Invalid=26459, Unknown=0, NotChecked=0, Total=34040 [2021-08-21 12:48:24,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2021-08-21 12:48:24,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 2250. [2021-08-21 12:48:24,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2250 states, 2249 states have (on average 2.377945753668297) internal successors, (5348), 2249 states have internal predecessors, (5348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:24,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 5348 transitions. [2021-08-21 12:48:24,342 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 5348 transitions. Word has length 45 [2021-08-21 12:48:24,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:24,342 INFO L470 AbstractCegarLoop]: Abstraction has 2250 states and 5348 transitions. [2021-08-21 12:48:24,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:24,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 5348 transitions. [2021-08-21 12:48:24,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-21 12:48:24,345 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:24,345 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:24,366 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 12:48:24,545 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 12:48:24,545 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:24,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:24,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1866568223, now seen corresponding path program 52 times [2021-08-21 12:48:24,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:24,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606750037] [2021-08-21 12:48:24,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:24,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:48:24,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:24,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606750037] [2021-08-21 12:48:24,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606750037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:24,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207041860] [2021-08-21 12:48:24,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:48:24,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:24,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:24,680 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 12:48:24,680 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 12:48:26,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:48:26,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:26,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 12:48:26,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:27,245 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:27,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207041860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:27,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:27,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2021-08-21 12:48:27,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770917013] [2021-08-21 12:48:27,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 12:48:27,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:27,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 12:48:27,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:48:27,246 INFO L87 Difference]: Start difference. First operand 2250 states and 5348 transitions. Second operand has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:28,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:28,994 INFO L93 Difference]: Finished difference Result 4598 states and 10315 transitions. [2021-08-21 12:48:28,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-21 12:48:28,995 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-21 12:48:28,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:29,000 INFO L225 Difference]: With dead ends: 4598 [2021-08-21 12:48:29,000 INFO L226 Difference]: Without dead ends: 4589 [2021-08-21 12:48:29,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 1408.4ms TimeCoverageRelationStatistics Valid=1438, Invalid=6394, Unknown=0, NotChecked=0, Total=7832 [2021-08-21 12:48:29,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4589 states. [2021-08-21 12:48:29,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4589 to 2962. [2021-08-21 12:48:29,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2962 states, 2961 states have (on average 2.403917595406957) internal successors, (7118), 2961 states have internal predecessors, (7118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:29,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 7118 transitions. [2021-08-21 12:48:29,034 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 7118 transitions. Word has length 45 [2021-08-21 12:48:29,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:29,034 INFO L470 AbstractCegarLoop]: Abstraction has 2962 states and 7118 transitions. [2021-08-21 12:48:29,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:29,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 7118 transitions. [2021-08-21 12:48:29,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:48:29,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:29,037 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:29,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:29,237 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 12:48:29,237 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:29,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:29,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1927395959, now seen corresponding path program 53 times [2021-08-21 12:48:29,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:29,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462810687] [2021-08-21 12:48:29,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:29,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 1 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:29,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:29,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462810687] [2021-08-21 12:48:29,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462810687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:29,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279090344] [2021-08-21 12:48:29,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:48:29,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:29,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:29,365 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 12:48:29,366 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 12:48:31,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-21 12:48:31,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:31,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:48:31,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:31,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279090344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:31,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:31,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:48:31,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139039225] [2021-08-21 12:48:31,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:48:31,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:31,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:48:31,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:48:31,560 INFO L87 Difference]: Start difference. First operand 2962 states and 7118 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 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 12:48:31,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:31,670 INFO L93 Difference]: Finished difference Result 3983 states and 9483 transitions. [2021-08-21 12:48:31,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:48:31,671 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 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 47 [2021-08-21 12:48:31,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:31,676 INFO L225 Difference]: With dead ends: 3983 [2021-08-21 12:48:31,676 INFO L226 Difference]: Without dead ends: 3920 [2021-08-21 12:48:31,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:48:31,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3920 states. [2021-08-21 12:48:31,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3920 to 3633. [2021-08-21 12:48:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3633 states, 3632 states have (on average 2.4430066079295156) internal successors, (8873), 3632 states have internal predecessors, (8873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:31,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3633 states to 3633 states and 8873 transitions. [2021-08-21 12:48:31,716 INFO L78 Accepts]: Start accepts. Automaton has 3633 states and 8873 transitions. Word has length 47 [2021-08-21 12:48:31,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:31,716 INFO L470 AbstractCegarLoop]: Abstraction has 3633 states and 8873 transitions. [2021-08-21 12:48:31,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 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 12:48:31,730 INFO L276 IsEmpty]: Start isEmpty. Operand 3633 states and 8873 transitions. [2021-08-21 12:48:31,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:48:31,734 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:31,734 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:31,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:31,934 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 12:48:31,934 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:31,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:31,935 INFO L82 PathProgramCache]: Analyzing trace with hash -129322871, now seen corresponding path program 54 times [2021-08-21 12:48:31,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:31,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462721010] [2021-08-21 12:48:31,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:31,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:32,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:32,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462721010] [2021-08-21 12:48:32,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462721010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:32,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20138468] [2021-08-21 12:48:32,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:48:32,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:32,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:32,149 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 12:48:32,180 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 12:48:34,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-21 12:48:34,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:34,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 12:48:34,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:34,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20138468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:34,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:34,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22] total 35 [2021-08-21 12:48:34,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788409737] [2021-08-21 12:48:34,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 12:48:34,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:34,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 12:48:34,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:48:34,960 INFO L87 Difference]: Start difference. First operand 3633 states and 8873 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:38,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:38,776 INFO L93 Difference]: Finished difference Result 5683 states and 13165 transitions. [2021-08-21 12:48:38,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-08-21 12:48:38,776 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 12:48:38,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:38,782 INFO L225 Difference]: With dead ends: 5683 [2021-08-21 12:48:38,782 INFO L226 Difference]: Without dead ends: 5679 [2021-08-21 12:48:38,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3956 ImplicationChecksByTransitivity, 2387.0ms TimeCoverageRelationStatistics Valid=1385, Invalid=11725, Unknown=0, NotChecked=0, Total=13110 [2021-08-21 12:48:38,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5679 states. [2021-08-21 12:48:38,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5679 to 3861. [2021-08-21 12:48:38,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3861 states, 3860 states have (on average 2.45699481865285) internal successors, (9484), 3860 states have internal predecessors, (9484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:38,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3861 states to 3861 states and 9484 transitions. [2021-08-21 12:48:38,824 INFO L78 Accepts]: Start accepts. Automaton has 3861 states and 9484 transitions. Word has length 47 [2021-08-21 12:48:38,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:38,824 INFO L470 AbstractCegarLoop]: Abstraction has 3861 states and 9484 transitions. [2021-08-21 12:48:38,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:38,824 INFO L276 IsEmpty]: Start isEmpty. Operand 3861 states and 9484 transitions. [2021-08-21 12:48:38,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:48:38,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:38,828 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:38,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-21 12:48:39,028 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 12:48:39,028 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:39,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:39,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1914879715, now seen corresponding path program 55 times [2021-08-21 12:48:39,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:39,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030727079] [2021-08-21 12:48:39,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:39,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:39,260 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:39,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:39,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030727079] [2021-08-21 12:48:39,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030727079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:39,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782774231] [2021-08-21 12:48:39,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:48:39,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:39,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:39,261 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 12:48:39,262 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 12:48:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:41,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 12:48:41,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:42,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782774231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:42,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:42,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-08-21 12:48:42,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117448717] [2021-08-21 12:48:42,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 12:48:42,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:42,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 12:48:42,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:48:42,156 INFO L87 Difference]: Start difference. First operand 3861 states and 9484 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:46,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:46,827 INFO L93 Difference]: Finished difference Result 8575 states and 19366 transitions. [2021-08-21 12:48:46,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-08-21 12:48:46,828 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 12:48:46,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:46,837 INFO L225 Difference]: With dead ends: 8575 [2021-08-21 12:48:46,837 INFO L226 Difference]: Without dead ends: 8527 [2021-08-21 12:48:46,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7798 ImplicationChecksByTransitivity, 3146.5ms TimeCoverageRelationStatistics Valid=2779, Invalid=19871, Unknown=0, NotChecked=0, Total=22650 [2021-08-21 12:48:46,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8527 states. [2021-08-21 12:48:46,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8527 to 3510. [2021-08-21 12:48:46,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3510 states, 3509 states have (on average 2.450555713878598) internal successors, (8599), 3509 states have internal predecessors, (8599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:46,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3510 states to 3510 states and 8599 transitions. [2021-08-21 12:48:46,888 INFO L78 Accepts]: Start accepts. Automaton has 3510 states and 8599 transitions. Word has length 47 [2021-08-21 12:48:46,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:46,888 INFO L470 AbstractCegarLoop]: Abstraction has 3510 states and 8599 transitions. [2021-08-21 12:48:46,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:46,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3510 states and 8599 transitions. [2021-08-21 12:48:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:48:46,891 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:46,892 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:46,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:47,092 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 12:48:47,092 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:47,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:47,092 INFO L82 PathProgramCache]: Analyzing trace with hash -829769113, now seen corresponding path program 56 times [2021-08-21 12:48:47,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:47,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040896179] [2021-08-21 12:48:47,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:47,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:47,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:47,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040896179] [2021-08-21 12:48:47,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040896179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:47,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283100283] [2021-08-21 12:48:47,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:48:47,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:47,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:47,329 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 12:48:47,362 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 12:48:49,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:48:49,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:49,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 12:48:49,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:50,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283100283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:50,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:50,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2021-08-21 12:48:50,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454718017] [2021-08-21 12:48:50,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:48:50,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:50,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:48:50,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:48:50,210 INFO L87 Difference]: Start difference. First operand 3510 states and 8599 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:53,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:53,869 INFO L93 Difference]: Finished difference Result 10171 states and 22757 transitions. [2021-08-21 12:48:53,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-08-21 12:48:53,869 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 12:48:53,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:53,881 INFO L225 Difference]: With dead ends: 10171 [2021-08-21 12:48:53,881 INFO L226 Difference]: Without dead ends: 10093 [2021-08-21 12:48:53,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7975 ImplicationChecksByTransitivity, 2832.9ms TimeCoverageRelationStatistics Valid=3216, Invalid=19434, Unknown=0, NotChecked=0, Total=22650 [2021-08-21 12:48:53,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10093 states. [2021-08-21 12:48:53,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10093 to 3623. [2021-08-21 12:48:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3623 states, 3622 states have (on average 2.4577581446714523) internal successors, (8902), 3622 states have internal predecessors, (8902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:53,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 8902 transitions. [2021-08-21 12:48:53,939 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 8902 transitions. Word has length 47 [2021-08-21 12:48:53,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:53,939 INFO L470 AbstractCegarLoop]: Abstraction has 3623 states and 8902 transitions. [2021-08-21 12:48:53,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:53,940 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 8902 transitions. [2021-08-21 12:48:53,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:48:53,943 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:53,943 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:53,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-21 12:48:54,144 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 12:48:54,145 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:54,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:54,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1198842603, now seen corresponding path program 57 times [2021-08-21 12:48:54,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:54,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200296301] [2021-08-21 12:48:54,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:54,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:54,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:54,368 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:54,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:54,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200296301] [2021-08-21 12:48:54,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200296301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:54,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163030374] [2021-08-21 12:48:54,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:48:54,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:54,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:54,369 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 12:48:54,370 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 12:48:56,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-21 12:48:56,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:56,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 12:48:56,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:57,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163030374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:57,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:57,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-08-21 12:48:57,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004328229] [2021-08-21 12:48:57,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 12:48:57,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:57,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 12:48:57,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:48:57,340 INFO L87 Difference]: Start difference. First operand 3623 states and 8902 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:00,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:00,215 INFO L93 Difference]: Finished difference Result 11503 states and 25462 transitions. [2021-08-21 12:49:00,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-08-21 12:49:00,216 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 12:49:00,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:00,230 INFO L225 Difference]: With dead ends: 11503 [2021-08-21 12:49:00,230 INFO L226 Difference]: Without dead ends: 11311 [2021-08-21 12:49:00,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5632 ImplicationChecksByTransitivity, 2235.8ms TimeCoverageRelationStatistics Valid=2609, Invalid=13647, Unknown=0, NotChecked=0, Total=16256 [2021-08-21 12:49:00,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11311 states. [2021-08-21 12:49:00,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11311 to 3647. [2021-08-21 12:49:00,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3647 states, 3646 states have (on average 2.4547449259462426) internal successors, (8950), 3646 states have internal predecessors, (8950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:00,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3647 states to 3647 states and 8950 transitions. [2021-08-21 12:49:00,299 INFO L78 Accepts]: Start accepts. Automaton has 3647 states and 8950 transitions. Word has length 47 [2021-08-21 12:49:00,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:00,299 INFO L470 AbstractCegarLoop]: Abstraction has 3647 states and 8950 transitions. [2021-08-21 12:49:00,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:00,300 INFO L276 IsEmpty]: Start isEmpty. Operand 3647 states and 8950 transitions. [2021-08-21 12:49:00,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:49:00,302 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:00,302 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:00,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:00,503 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 12:49:00,503 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:00,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:00,503 INFO L82 PathProgramCache]: Analyzing trace with hash 660273263, now seen corresponding path program 58 times [2021-08-21 12:49:00,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:00,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49599859] [2021-08-21 12:49:00,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:00,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:00,750 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:00,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:00,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49599859] [2021-08-21 12:49:00,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49599859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:00,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564838971] [2021-08-21 12:49:00,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:49:00,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:00,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:00,751 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 12:49:00,752 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 12:49:02,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:49:02,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:02,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 12:49:02,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:03,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564838971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:03,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:03,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2021-08-21 12:49:03,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875321890] [2021-08-21 12:49:03,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 12:49:03,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:03,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 12:49:03,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:49:03,822 INFO L87 Difference]: Start difference. First operand 3647 states and 8950 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:07,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:07,121 INFO L93 Difference]: Finished difference Result 11968 states and 26283 transitions. [2021-08-21 12:49:07,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-08-21 12:49:07,121 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 12:49:07,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:07,135 INFO L225 Difference]: With dead ends: 11968 [2021-08-21 12:49:07,135 INFO L226 Difference]: Without dead ends: 11623 [2021-08-21 12:49:07,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8211 ImplicationChecksByTransitivity, 2783.3ms TimeCoverageRelationStatistics Valid=4142, Invalid=18208, Unknown=0, NotChecked=0, Total=22350 [2021-08-21 12:49:07,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11623 states. [2021-08-21 12:49:07,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11623 to 3663. [2021-08-21 12:49:07,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 2.452758055707264) internal successors, (8982), 3662 states have internal predecessors, (8982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:07,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 8982 transitions. [2021-08-21 12:49:07,206 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 8982 transitions. Word has length 47 [2021-08-21 12:49:07,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:07,206 INFO L470 AbstractCegarLoop]: Abstraction has 3663 states and 8982 transitions. [2021-08-21 12:49:07,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:07,206 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 8982 transitions. [2021-08-21 12:49:07,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:49:07,208 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:07,208 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:07,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-21 12:49:07,408 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 12:49:07,409 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:07,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:07,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1892072179, now seen corresponding path program 59 times [2021-08-21 12:49:07,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:07,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929016514] [2021-08-21 12:49:07,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:07,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:07,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:07,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929016514] [2021-08-21 12:49:07,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929016514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:07,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906455149] [2021-08-21 12:49:07,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:49:07,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:07,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:07,648 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 12:49:07,648 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 12:49:09,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-21 12:49:09,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:09,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-21 12:49:09,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:10,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906455149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:10,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:10,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-21 12:49:10,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784325656] [2021-08-21 12:49:10,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 12:49:10,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:10,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 12:49:10,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1540, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:49:10,685 INFO L87 Difference]: Start difference. First operand 3663 states and 8982 transitions. Second operand has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:14,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:14,037 INFO L93 Difference]: Finished difference Result 10835 states and 24208 transitions. [2021-08-21 12:49:14,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-08-21 12:49:14,037 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 12:49:14,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:14,050 INFO L225 Difference]: With dead ends: 10835 [2021-08-21 12:49:14,050 INFO L226 Difference]: Without dead ends: 10388 [2021-08-21 12:49:14,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8695 ImplicationChecksByTransitivity, 3024.9ms TimeCoverageRelationStatistics Valid=4887, Invalid=19293, Unknown=0, NotChecked=0, Total=24180 [2021-08-21 12:49:14,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10388 states. [2021-08-21 12:49:14,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10388 to 3976. [2021-08-21 12:49:14,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3976 states, 3975 states have (on average 2.4070440251572327) internal successors, (9568), 3975 states have internal predecessors, (9568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:14,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3976 states to 3976 states and 9568 transitions. [2021-08-21 12:49:14,115 INFO L78 Accepts]: Start accepts. Automaton has 3976 states and 9568 transitions. Word has length 47 [2021-08-21 12:49:14,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:14,115 INFO L470 AbstractCegarLoop]: Abstraction has 3976 states and 9568 transitions. [2021-08-21 12:49:14,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:14,115 INFO L276 IsEmpty]: Start isEmpty. Operand 3976 states and 9568 transitions. [2021-08-21 12:49:14,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:49:14,118 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:14,118 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:14,141 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 12:49:14,318 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 12:49:14,319 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:14,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:14,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1055250745, now seen corresponding path program 60 times [2021-08-21 12:49:14,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:14,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496922986] [2021-08-21 12:49:14,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:14,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:14,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:14,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496922986] [2021-08-21 12:49:14,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496922986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:14,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285450307] [2021-08-21 12:49:14,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:49:14,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:14,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:14,479 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 12:49:14,480 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 12:49:16,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 12:49:16,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:16,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 12:49:16,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:17,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285450307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:17,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:17,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 34 [2021-08-21 12:49:17,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586194452] [2021-08-21 12:49:17,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:49:17,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:17,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:49:17,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:49:17,717 INFO L87 Difference]: Start difference. First operand 3976 states and 9568 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:22,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:22,254 INFO L93 Difference]: Finished difference Result 7944 states and 17889 transitions. [2021-08-21 12:49:22,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-08-21 12:49:22,254 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 12:49:22,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:22,263 INFO L225 Difference]: With dead ends: 7944 [2021-08-21 12:49:22,264 INFO L226 Difference]: Without dead ends: 7940 [2021-08-21 12:49:22,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14541 ImplicationChecksByTransitivity, 4093.1ms TimeCoverageRelationStatistics Valid=7575, Invalid=27581, Unknown=0, NotChecked=0, Total=35156 [2021-08-21 12:49:22,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7940 states. [2021-08-21 12:49:22,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7940 to 4065. [2021-08-21 12:49:22,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4065 states, 4064 states have (on average 2.421998031496063) internal successors, (9843), 4064 states have internal predecessors, (9843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:22,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4065 states to 4065 states and 9843 transitions. [2021-08-21 12:49:22,318 INFO L78 Accepts]: Start accepts. Automaton has 4065 states and 9843 transitions. Word has length 47 [2021-08-21 12:49:22,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:22,318 INFO L470 AbstractCegarLoop]: Abstraction has 4065 states and 9843 transitions. [2021-08-21 12:49:22,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:22,318 INFO L276 IsEmpty]: Start isEmpty. Operand 4065 states and 9843 transitions. [2021-08-21 12:49:22,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 12:49:22,321 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:22,321 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:22,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-21 12:49:22,522 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 12:49:22,522 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:22,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:22,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1962795719, now seen corresponding path program 61 times [2021-08-21 12:49:22,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:22,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146048325] [2021-08-21 12:49:22,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:22,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:22,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:22,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146048325] [2021-08-21 12:49:22,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146048325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:22,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253417094] [2021-08-21 12:49:22,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:49:22,768 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:22,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:22,769 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 12:49:22,769 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 12:49:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:25,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 12:49:25,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:25,978 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:25,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253417094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:25,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:25,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2021-08-21 12:49:25,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6120885] [2021-08-21 12:49:25,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-21 12:49:25,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:25,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-21 12:49:25,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1541, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 12:49:25,979 INFO L87 Difference]: Start difference. First operand 4065 states and 9843 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:29,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:29,313 INFO L93 Difference]: Finished difference Result 6076 states and 13919 transitions. [2021-08-21 12:49:29,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-08-21 12:49:29,314 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 12:49:29,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:29,320 INFO L225 Difference]: With dead ends: 6076 [2021-08-21 12:49:29,320 INFO L226 Difference]: Without dead ends: 5806 [2021-08-21 12:49:29,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9288 ImplicationChecksByTransitivity, 3088.4ms TimeCoverageRelationStatistics Valid=6810, Invalid=19272, Unknown=0, NotChecked=0, Total=26082 [2021-08-21 12:49:29,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5806 states. [2021-08-21 12:49:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5806 to 3976. [2021-08-21 12:49:29,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3976 states, 3975 states have (on average 2.4171069182389937) internal successors, (9608), 3975 states have internal predecessors, (9608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:29,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3976 states to 3976 states and 9608 transitions. [2021-08-21 12:49:29,365 INFO L78 Accepts]: Start accepts. Automaton has 3976 states and 9608 transitions. Word has length 49 [2021-08-21 12:49:29,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:29,365 INFO L470 AbstractCegarLoop]: Abstraction has 3976 states and 9608 transitions. [2021-08-21 12:49:29,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:29,365 INFO L276 IsEmpty]: Start isEmpty. Operand 3976 states and 9608 transitions. [2021-08-21 12:49:29,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 12:49:29,368 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:29,368 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:29,391 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 12:49:29,569 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 12:49:29,569 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:29,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:29,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1919003925, now seen corresponding path program 62 times [2021-08-21 12:49:29,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:29,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807065615] [2021-08-21 12:49:29,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:29,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:29,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:29,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807065615] [2021-08-21 12:49:29,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807065615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:29,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739744312] [2021-08-21 12:49:29,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:49:29,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:29,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:29,725 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 12:49:29,726 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 12:49:32,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:49:32,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:32,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:49:32,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:33,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739744312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:33,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:33,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 22] total 33 [2021-08-21 12:49:33,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221754324] [2021-08-21 12:49:33,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 12:49:33,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:33,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 12:49:33,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=881, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:49:33,006 INFO L87 Difference]: Start difference. First operand 3976 states and 9608 transitions. Second operand has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:36,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:36,112 INFO L93 Difference]: Finished difference Result 5008 states and 11628 transitions. [2021-08-21 12:49:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-08-21 12:49:36,112 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 12:49:36,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:36,118 INFO L225 Difference]: With dead ends: 5008 [2021-08-21 12:49:36,118 INFO L226 Difference]: Without dead ends: 5004 [2021-08-21 12:49:36,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8705 ImplicationChecksByTransitivity, 2941.7ms TimeCoverageRelationStatistics Valid=5366, Invalid=17586, Unknown=0, NotChecked=0, Total=22952 [2021-08-21 12:49:36,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5004 states. [2021-08-21 12:49:36,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5004 to 3976. [2021-08-21 12:49:36,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3976 states, 3975 states have (on average 2.4168553459119497) internal successors, (9607), 3975 states have internal predecessors, (9607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:36,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3976 states to 3976 states and 9607 transitions. [2021-08-21 12:49:36,156 INFO L78 Accepts]: Start accepts. Automaton has 3976 states and 9607 transitions. Word has length 49 [2021-08-21 12:49:36,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:36,156 INFO L470 AbstractCegarLoop]: Abstraction has 3976 states and 9607 transitions. [2021-08-21 12:49:36,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:36,156 INFO L276 IsEmpty]: Start isEmpty. Operand 3976 states and 9607 transitions. [2021-08-21 12:49:36,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-21 12:49:36,160 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:36,160 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:36,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:36,360 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 12:49:36,360 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:36,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:36,360 INFO L82 PathProgramCache]: Analyzing trace with hash -167181371, now seen corresponding path program 63 times [2021-08-21 12:49:36,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:36,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125288760] [2021-08-21 12:49:36,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:36,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 1 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:36,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:36,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125288760] [2021-08-21 12:49:36,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125288760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:36,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972798129] [2021-08-21 12:49:36,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:49:36,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:36,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:36,533 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 12:49:36,576 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 12:49:39,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-21 12:49:39,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:39,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 12:49:39,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:39,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972798129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:39,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:39,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 19 [2021-08-21 12:49:39,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018432065] [2021-08-21 12:49:39,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:49:39,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:39,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:49:39,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:49:39,447 INFO L87 Difference]: Start difference. First operand 3976 states and 9607 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:39,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:39,702 INFO L93 Difference]: Finished difference Result 5222 states and 12455 transitions. [2021-08-21 12:49:39,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:49:39,702 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-21 12:49:39,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:39,708 INFO L225 Difference]: With dead ends: 5222 [2021-08-21 12:49:39,708 INFO L226 Difference]: Without dead ends: 5144 [2021-08-21 12:49:39,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 214.9ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:49:39,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5144 states. [2021-08-21 12:49:39,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5144 to 4547. [2021-08-21 12:49:39,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4547 states, 4546 states have (on average 2.443466783985922) internal successors, (11108), 4546 states have internal predecessors, (11108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:39,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4547 states to 4547 states and 11108 transitions. [2021-08-21 12:49:39,759 INFO L78 Accepts]: Start accepts. Automaton has 4547 states and 11108 transitions. Word has length 51 [2021-08-21 12:49:39,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:39,760 INFO L470 AbstractCegarLoop]: Abstraction has 4547 states and 11108 transitions. [2021-08-21 12:49:39,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:39,760 INFO L276 IsEmpty]: Start isEmpty. Operand 4547 states and 11108 transitions. [2021-08-21 12:49:39,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-21 12:49:39,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:39,763 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:39,789 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 12:49:39,976 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 12:49:39,977 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:39,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:39,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1901889819, now seen corresponding path program 64 times [2021-08-21 12:49:39,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:39,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197099582] [2021-08-21 12:49:39,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:39,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:39,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:40,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:40,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197099582] [2021-08-21 12:49:40,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197099582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:40,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117530487] [2021-08-21 12:49:40,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:49:40,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:40,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:40,251 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 12:49:40,252 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 12:49:42,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:49:42,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:42,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 12:49:42,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:43,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117530487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:43,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:43,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23] total 39 [2021-08-21 12:49:43,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073278826] [2021-08-21 12:49:43,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 12:49:43,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:43,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 12:49:43,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:49:43,741 INFO L87 Difference]: Start difference. First operand 4547 states and 11108 transitions. Second operand has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:48,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:48,482 INFO L93 Difference]: Finished difference Result 9249 states and 20971 transitions. [2021-08-21 12:49:48,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-08-21 12:49:48,482 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-21 12:49:48,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:48,494 INFO L225 Difference]: With dead ends: 9249 [2021-08-21 12:49:48,494 INFO L226 Difference]: Without dead ends: 9216 [2021-08-21 12:49:48,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6688 ImplicationChecksByTransitivity, 2983.0ms TimeCoverageRelationStatistics Valid=1955, Invalid=18637, Unknown=0, NotChecked=0, Total=20592 [2021-08-21 12:49:48,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2021-08-21 12:49:48,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 5001. [2021-08-21 12:49:48,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5001 states, 5000 states have (on average 2.443) internal successors, (12215), 5000 states have internal predecessors, (12215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:48,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5001 states to 5001 states and 12215 transitions. [2021-08-21 12:49:48,565 INFO L78 Accepts]: Start accepts. Automaton has 5001 states and 12215 transitions. Word has length 51 [2021-08-21 12:49:48,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:48,565 INFO L470 AbstractCegarLoop]: Abstraction has 5001 states and 12215 transitions. [2021-08-21 12:49:48,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:48,565 INFO L276 IsEmpty]: Start isEmpty. Operand 5001 states and 12215 transitions. [2021-08-21 12:49:48,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-21 12:49:48,569 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:48,569 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:48,594 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 12:49:48,771 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 12:49:48,771 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:48,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:48,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1171523909, now seen corresponding path program 65 times [2021-08-21 12:49:48,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:48,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584464569] [2021-08-21 12:49:48,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:48,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:49,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:49,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584464569] [2021-08-21 12:49:49,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584464569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:49,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922455459] [2021-08-21 12:49:49,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:49:49,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:49,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:49,030 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 12:49:49,031 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 12:49:51,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-21 12:49:51,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:51,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-21 12:49:51,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:52,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922455459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:52,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:52,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23] total 37 [2021-08-21 12:49:52,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923990497] [2021-08-21 12:49:52,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 12:49:52,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:52,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 12:49:52,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:49:52,633 INFO L87 Difference]: Start difference. First operand 5001 states and 12215 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:56,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:56,019 INFO L93 Difference]: Finished difference Result 7130 states and 16594 transitions. [2021-08-21 12:49:56,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-08-21 12:49:56,019 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-21 12:49:56,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:56,027 INFO L225 Difference]: With dead ends: 7130 [2021-08-21 12:49:56,028 INFO L226 Difference]: Without dead ends: 7126 [2021-08-21 12:49:56,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3592 ImplicationChecksByTransitivity, 2244.5ms TimeCoverageRelationStatistics Valid=1241, Invalid=10969, Unknown=0, NotChecked=0, Total=12210 [2021-08-21 12:49:56,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7126 states. [2021-08-21 12:49:56,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7126 to 4689. [2021-08-21 12:49:56,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4689 states, 4688 states have (on average 2.4375) internal successors, (11427), 4688 states have internal predecessors, (11427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:56,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4689 states to 4689 states and 11427 transitions. [2021-08-21 12:49:56,084 INFO L78 Accepts]: Start accepts. Automaton has 4689 states and 11427 transitions. Word has length 51 [2021-08-21 12:49:56,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:56,084 INFO L470 AbstractCegarLoop]: Abstraction has 4689 states and 11427 transitions. [2021-08-21 12:49:56,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:56,084 INFO L276 IsEmpty]: Start isEmpty. Operand 4689 states and 11427 transitions. [2021-08-21 12:49:56,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-21 12:49:56,103 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:56,103 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:56,126 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 12:49:56,303 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 12:49:56,304 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:56,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:56,304 INFO L82 PathProgramCache]: Analyzing trace with hash -496654433, now seen corresponding path program 66 times [2021-08-21 12:49:56,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:56,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462166322] [2021-08-21 12:49:56,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:56,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:56,579 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:56,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:56,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462166322] [2021-08-21 12:49:56,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462166322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:56,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347907537] [2021-08-21 12:49:56,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:49:56,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:56,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:56,580 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 12:49:56,580 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 12:49:59,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-08-21 12:49:59,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:59,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 12:49:59,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:00,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347907537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:00,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:00,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 40 [2021-08-21 12:50:00,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960206167] [2021-08-21 12:50:00,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 12:50:00,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:00,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 12:50:00,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 12:50:00,159 INFO L87 Difference]: Start difference. First operand 4689 states and 11427 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:05,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:05,769 INFO L93 Difference]: Finished difference Result 10458 states and 23569 transitions. [2021-08-21 12:50:05,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-08-21 12:50:05,769 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-21 12:50:05,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:05,783 INFO L225 Difference]: With dead ends: 10458 [2021-08-21 12:50:05,783 INFO L226 Difference]: Without dead ends: 10410 [2021-08-21 12:50:05,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10557 ImplicationChecksByTransitivity, 3866.5ms TimeCoverageRelationStatistics Valid=3311, Invalid=26791, Unknown=0, NotChecked=0, Total=30102 [2021-08-21 12:50:05,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10410 states. [2021-08-21 12:50:05,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10410 to 4684. [2021-08-21 12:50:05,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4684 states, 4683 states have (on average 2.4371129617766387) internal successors, (11413), 4683 states have internal predecessors, (11413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:05,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4684 states to 4684 states and 11413 transitions. [2021-08-21 12:50:05,858 INFO L78 Accepts]: Start accepts. Automaton has 4684 states and 11413 transitions. Word has length 51 [2021-08-21 12:50:05,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:05,859 INFO L470 AbstractCegarLoop]: Abstraction has 4684 states and 11413 transitions. [2021-08-21 12:50:05,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:05,859 INFO L276 IsEmpty]: Start isEmpty. Operand 4684 states and 11413 transitions. [2021-08-21 12:50:05,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-21 12:50:05,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:05,862 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:05,925 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 12:50:06,072 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 12:50:06,073 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:50:06,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:06,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1721552093, now seen corresponding path program 67 times [2021-08-21 12:50:06,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:06,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562083628] [2021-08-21 12:50:06,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:06,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:06,458 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:06,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:06,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562083628] [2021-08-21 12:50:06,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562083628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:06,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631144373] [2021-08-21 12:50:06,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:50:06,458 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:06,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:06,459 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 12:50:06,459 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 12:50:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:09,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 12:50:09,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:10,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631144373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:10,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:10,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2021-08-21 12:50:10,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272634741] [2021-08-21 12:50:10,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 12:50:10,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:10,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 12:50:10,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1520, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:50:10,305 INFO L87 Difference]: Start difference. First operand 4684 states and 11413 transitions. Second operand has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:16,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:16,572 INFO L93 Difference]: Finished difference Result 12635 states and 28317 transitions. [2021-08-21 12:50:16,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-08-21 12:50:16,572 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-21 12:50:16,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:16,605 INFO L225 Difference]: With dead ends: 12635 [2021-08-21 12:50:16,605 INFO L226 Difference]: Without dead ends: 12557 [2021-08-21 12:50:16,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11882 ImplicationChecksByTransitivity, 4239.5ms TimeCoverageRelationStatistics Valid=4150, Invalid=28792, Unknown=0, NotChecked=0, Total=32942 [2021-08-21 12:50:16,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12557 states. [2021-08-21 12:50:16,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12557 to 4565. [2021-08-21 12:50:16,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4565 states, 4564 states have (on average 2.4397458369851006) internal successors, (11135), 4564 states have internal predecessors, (11135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:16,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4565 states to 4565 states and 11135 transitions. [2021-08-21 12:50:16,676 INFO L78 Accepts]: Start accepts. Automaton has 4565 states and 11135 transitions. Word has length 51 [2021-08-21 12:50:16,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:16,676 INFO L470 AbstractCegarLoop]: Abstraction has 4565 states and 11135 transitions. [2021-08-21 12:50:16,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:16,676 INFO L276 IsEmpty]: Start isEmpty. Operand 4565 states and 11135 transitions. [2021-08-21 12:50:16,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-21 12:50:16,680 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:16,680 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:16,705 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 12:50:16,880 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 12:50:16,880 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:50:16,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:16,881 INFO L82 PathProgramCache]: Analyzing trace with hash 499051431, now seen corresponding path program 68 times [2021-08-21 12:50:16,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:16,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413546320] [2021-08-21 12:50:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:16,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:17,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:17,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413546320] [2021-08-21 12:50:17,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413546320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:17,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771221580] [2021-08-21 12:50:17,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:50:17,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:17,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:17,184 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 12:50:17,186 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 12:50:20,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:50:20,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:20,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:50:20,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:20,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771221580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:20,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:20,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-08-21 12:50:20,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471642712] [2021-08-21 12:50:20,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 12:50:20,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:20,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 12:50:20,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1587, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:50:20,981 INFO L87 Difference]: Start difference. First operand 4565 states and 11135 transitions. Second operand has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:25,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:25,690 INFO L93 Difference]: Finished difference Result 15002 states and 33402 transitions. [2021-08-21 12:50:25,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-08-21 12:50:25,691 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-21 12:50:25,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:25,709 INFO L225 Difference]: With dead ends: 15002 [2021-08-21 12:50:25,710 INFO L226 Difference]: Without dead ends: 14732 [2021-08-21 12:50:25,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10138 ImplicationChecksByTransitivity, 3365.6ms TimeCoverageRelationStatistics Valid=4084, Invalid=23972, Unknown=0, NotChecked=0, Total=28056 [2021-08-21 12:50:25,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14732 states. [2021-08-21 12:50:25,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14732 to 4741. [2021-08-21 12:50:25,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4741 states, 4740 states have (on average 2.442827004219409) internal successors, (11579), 4740 states have internal predecessors, (11579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:25,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4741 states to 4741 states and 11579 transitions. [2021-08-21 12:50:25,807 INFO L78 Accepts]: Start accepts. Automaton has 4741 states and 11579 transitions. Word has length 51 [2021-08-21 12:50:25,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:25,807 INFO L470 AbstractCegarLoop]: Abstraction has 4741 states and 11579 transitions. [2021-08-21 12:50:25,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:25,807 INFO L276 IsEmpty]: Start isEmpty. Operand 4741 states and 11579 transitions. [2021-08-21 12:50:25,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-21 12:50:25,810 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:25,811 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:25,838 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 12:50:26,011 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 12:50:26,011 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:50:26,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:26,011 INFO L82 PathProgramCache]: Analyzing trace with hash -218984149, now seen corresponding path program 69 times [2021-08-21 12:50:26,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:26,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404778291] [2021-08-21 12:50:26,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:26,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:26,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:26,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404778291] [2021-08-21 12:50:26,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404778291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:26,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333438776] [2021-08-21 12:50:26,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:50:26,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:26,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:26,328 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 12:50:26,329 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 12:50:29,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-21 12:50:29,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:29,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:50:29,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:30,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333438776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:30,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:30,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2021-08-21 12:50:30,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471944467] [2021-08-21 12:50:30,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-21 12:50:30,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:30,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-21 12:50:30,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1653, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 12:50:30,296 INFO L87 Difference]: Start difference. First operand 4741 states and 11579 transitions. Second operand has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:34,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:34,039 INFO L93 Difference]: Finished difference Result 15974 states and 35294 transitions. [2021-08-21 12:50:34,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-08-21 12:50:34,040 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-21 12:50:34,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:34,057 INFO L225 Difference]: With dead ends: 15974 [2021-08-21 12:50:34,057 INFO L226 Difference]: Without dead ends: 15650 [2021-08-21 12:50:34,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8469 ImplicationChecksByTransitivity, 3130.2ms TimeCoverageRelationStatistics Valid=3844, Invalid=19718, Unknown=0, NotChecked=0, Total=23562 [2021-08-21 12:50:34,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15650 states. [2021-08-21 12:50:34,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15650 to 4765. [2021-08-21 12:50:34,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4765 states, 4764 states have (on average 2.440596137699412) internal successors, (11627), 4764 states have internal predecessors, (11627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:34,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4765 states to 4765 states and 11627 transitions. [2021-08-21 12:50:34,142 INFO L78 Accepts]: Start accepts. Automaton has 4765 states and 11627 transitions. Word has length 51 [2021-08-21 12:50:34,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:34,142 INFO L470 AbstractCegarLoop]: Abstraction has 4765 states and 11627 transitions. [2021-08-21 12:50:34,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:34,143 INFO L276 IsEmpty]: Start isEmpty. Operand 4765 states and 11627 transitions. [2021-08-21 12:50:34,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-21 12:50:34,146 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:34,146 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:34,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:34,358 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 12:50:34,358 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:50:34,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:34,359 INFO L82 PathProgramCache]: Analyzing trace with hash 344449967, now seen corresponding path program 70 times [2021-08-21 12:50:34,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:34,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193039420] [2021-08-21 12:50:34,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:34,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:34,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:34,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193039420] [2021-08-21 12:50:34,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193039420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:34,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063372482] [2021-08-21 12:50:34,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:50:34,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:34,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:34,658 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 12:50:34,659 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 12:50:37,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:50:37,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:37,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 12:50:37,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:38,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063372482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:38,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:38,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2021-08-21 12:50:38,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945842385] [2021-08-21 12:50:38,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-21 12:50:38,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:38,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-21 12:50:38,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1788, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 12:50:38,655 INFO L87 Difference]: Start difference. First operand 4765 states and 11627 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:43,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:43,140 INFO L93 Difference]: Finished difference Result 15636 states and 34293 transitions. [2021-08-21 12:50:43,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-08-21 12:50:43,141 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-21 12:50:43,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:43,159 INFO L225 Difference]: With dead ends: 15636 [2021-08-21 12:50:43,159 INFO L226 Difference]: Without dead ends: 15168 [2021-08-21 12:50:43,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11849 ImplicationChecksByTransitivity, 3768.2ms TimeCoverageRelationStatistics Valid=5935, Invalid=25571, Unknown=0, NotChecked=0, Total=31506 [2021-08-21 12:50:43,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15168 states. [2021-08-21 12:50:43,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15168 to 4781. [2021-08-21 12:50:43,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4781 states, 4780 states have (on average 2.439121338912134) internal successors, (11659), 4780 states have internal predecessors, (11659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:43,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4781 states to 4781 states and 11659 transitions. [2021-08-21 12:50:43,251 INFO L78 Accepts]: Start accepts. Automaton has 4781 states and 11659 transitions. Word has length 51 [2021-08-21 12:50:43,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:43,251 INFO L470 AbstractCegarLoop]: Abstraction has 4781 states and 11659 transitions. [2021-08-21 12:50:43,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:43,251 INFO L276 IsEmpty]: Start isEmpty. Operand 4781 states and 11659 transitions. [2021-08-21 12:50:43,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-21 12:50:43,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:43,255 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:43,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:43,455 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 12:50:43,455 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:50:43,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:43,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1914217267, now seen corresponding path program 71 times [2021-08-21 12:50:43,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:43,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933821783] [2021-08-21 12:50:43,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:43,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:43,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:43,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933821783] [2021-08-21 12:50:43,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933821783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:43,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660482560] [2021-08-21 12:50:43,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:50:43,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:43,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:43,781 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 12:50:43,782 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 12:50:46,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-21 12:50:46,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:46,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:50:46,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:47,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660482560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:47,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:47,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-08-21 12:50:47,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169637109] [2021-08-21 12:50:47,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-21 12:50:47,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:47,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-21 12:50:47,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1846, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 12:50:47,769 INFO L87 Difference]: Start difference. First operand 4781 states and 11659 transitions. Second operand has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:52,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:52,424 INFO L93 Difference]: Finished difference Result 14007 states and 31265 transitions. [2021-08-21 12:50:52,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-08-21 12:50:52,425 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-21 12:50:52,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:52,455 INFO L225 Difference]: With dead ends: 14007 [2021-08-21 12:50:52,456 INFO L226 Difference]: Without dead ends: 13413 [2021-08-21 12:50:52,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12336 ImplicationChecksByTransitivity, 4009.0ms TimeCoverageRelationStatistics Valid=6793, Invalid=26513, Unknown=0, NotChecked=0, Total=33306 [2021-08-21 12:50:52,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13413 states. [2021-08-21 12:50:52,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13413 to 4829. [2021-08-21 12:50:52,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4828 states have (on average 2.3985086992543496) internal successors, (11580), 4828 states have internal predecessors, (11580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:52,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 11580 transitions. [2021-08-21 12:50:52,535 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 11580 transitions. Word has length 51 [2021-08-21 12:50:52,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:52,535 INFO L470 AbstractCegarLoop]: Abstraction has 4829 states and 11580 transitions. [2021-08-21 12:50:52,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:52,536 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 11580 transitions. [2021-08-21 12:50:52,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-21 12:50:52,540 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:52,540 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:52,565 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 12:50:52,765 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 12:50:52,765 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:50:52,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:52,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1152851267, now seen corresponding path program 72 times [2021-08-21 12:50:52,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:52,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468628800] [2021-08-21 12:50:52,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:52,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:53,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:53,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468628800] [2021-08-21 12:50:53,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468628800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:53,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653771586] [2021-08-21 12:50:53,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:50:53,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:53,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:53,005 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 12:50:53,006 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 12:50:56,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-21 12:50:56,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:56,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 12:50:56,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:57,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653771586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:57,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:57,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24] total 37 [2021-08-21 12:50:57,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113878861] [2021-08-21 12:50:57,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 12:50:57,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:57,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 12:50:57,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:50:57,221 INFO L87 Difference]: Start difference. First operand 4829 states and 11580 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:03,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:03,117 INFO L93 Difference]: Finished difference Result 9446 states and 21206 transitions. [2021-08-21 12:51:03,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-08-21 12:51:03,117 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-21 12:51:03,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:03,127 INFO L225 Difference]: With dead ends: 9446 [2021-08-21 12:51:03,127 INFO L226 Difference]: Without dead ends: 9442 [2021-08-21 12:51:03,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22325 ImplicationChecksByTransitivity, 5367.8ms TimeCoverageRelationStatistics Valid=11066, Invalid=40690, Unknown=0, NotChecked=0, Total=51756 [2021-08-21 12:51:03,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9442 states. [2021-08-21 12:51:03,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9442 to 4919. [2021-08-21 12:51:03,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4919 states, 4918 states have (on average 2.4131760878405855) internal successors, (11868), 4918 states have internal predecessors, (11868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:03,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4919 states to 4919 states and 11868 transitions. [2021-08-21 12:51:03,216 INFO L78 Accepts]: Start accepts. Automaton has 4919 states and 11868 transitions. Word has length 51 [2021-08-21 12:51:03,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:03,216 INFO L470 AbstractCegarLoop]: Abstraction has 4919 states and 11868 transitions. [2021-08-21 12:51:03,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:03,216 INFO L276 IsEmpty]: Start isEmpty. Operand 4919 states and 11868 transitions. [2021-08-21 12:51:03,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 12:51:03,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:03,220 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:03,244 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 12:51:03,420 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 12:51:03,420 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:51:03,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:03,420 INFO L82 PathProgramCache]: Analyzing trace with hash 2117849603, now seen corresponding path program 73 times [2021-08-21 12:51:03,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:03,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663736548] [2021-08-21 12:51:03,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:03,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:03,690 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:03,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:03,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663736548] [2021-08-21 12:51:03,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663736548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:03,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848433499] [2021-08-21 12:51:03,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:51:03,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:03,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:03,691 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 12:51:03,692 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 12:51:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:06,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 12:51:06,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:07,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848433499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:07,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:07,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-08-21 12:51:07,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620280569] [2021-08-21 12:51:07,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-21 12:51:07,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:07,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-21 12:51:07,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=1843, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 12:51:07,826 INFO L87 Difference]: Start difference. First operand 4919 states and 11868 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:12,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:12,152 INFO L93 Difference]: Finished difference Result 6854 states and 15607 transitions. [2021-08-21 12:51:12,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-08-21 12:51:12,153 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 12:51:12,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:12,159 INFO L225 Difference]: With dead ends: 6854 [2021-08-21 12:51:12,159 INFO L226 Difference]: Without dead ends: 6542 [2021-08-21 12:51:12,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13205 ImplicationChecksByTransitivity, 3950.3ms TimeCoverageRelationStatistics Valid=9334, Invalid=26198, Unknown=0, NotChecked=0, Total=35532 [2021-08-21 12:51:12,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6542 states. [2021-08-21 12:51:12,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6542 to 4918. [2021-08-21 12:51:12,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4918 states, 4917 states have (on average 2.4102094773235714) internal successors, (11851), 4917 states have internal predecessors, (11851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:12,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4918 states to 4918 states and 11851 transitions. [2021-08-21 12:51:12,210 INFO L78 Accepts]: Start accepts. Automaton has 4918 states and 11851 transitions. Word has length 53 [2021-08-21 12:51:12,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:12,210 INFO L470 AbstractCegarLoop]: Abstraction has 4918 states and 11851 transitions. [2021-08-21 12:51:12,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:12,210 INFO L276 IsEmpty]: Start isEmpty. Operand 4918 states and 11851 transitions. [2021-08-21 12:51:12,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 12:51:12,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:12,214 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:12,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-21 12:51:12,414 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 12:51:12,414 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:51:12,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:12,414 INFO L82 PathProgramCache]: Analyzing trace with hash -226669163, now seen corresponding path program 74 times [2021-08-21 12:51:12,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:12,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533001308] [2021-08-21 12:51:12,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:12,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:12,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:12,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533001308] [2021-08-21 12:51:12,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533001308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:12,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240870977] [2021-08-21 12:51:12,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:51:12,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:12,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:12,633 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 12:51:12,634 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 12:51:15,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:51:15,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:15,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:51:15,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:16,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240870977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:16,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:16,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 24] total 36 [2021-08-21 12:51:16,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818277226] [2021-08-21 12:51:16,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:51:16,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:16,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:51:16,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1051, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:51:16,732 INFO L87 Difference]: Start difference. First operand 4918 states and 11851 transitions. Second operand has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:20,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:20,710 INFO L93 Difference]: Finished difference Result 6178 states and 14323 transitions. [2021-08-21 12:51:20,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-08-21 12:51:20,711 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 12:51:20,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:20,716 INFO L225 Difference]: With dead ends: 6178 [2021-08-21 12:51:20,716 INFO L226 Difference]: Without dead ends: 6174 [2021-08-21 12:51:20,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12456 ImplicationChecksByTransitivity, 3797.9ms TimeCoverageRelationStatistics Valid=7354, Invalid=24152, Unknown=0, NotChecked=0, Total=31506 [2021-08-21 12:51:20,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6174 states. [2021-08-21 12:51:20,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6174 to 4882. [2021-08-21 12:51:20,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4882 states, 4881 states have (on average 2.4130301167793484) internal successors, (11778), 4881 states have internal predecessors, (11778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:20,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4882 states to 4882 states and 11778 transitions. [2021-08-21 12:51:20,783 INFO L78 Accepts]: Start accepts. Automaton has 4882 states and 11778 transitions. Word has length 53 [2021-08-21 12:51:20,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:20,783 INFO L470 AbstractCegarLoop]: Abstraction has 4882 states and 11778 transitions. [2021-08-21 12:51:20,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:20,783 INFO L276 IsEmpty]: Start isEmpty. Operand 4882 states and 11778 transitions. [2021-08-21 12:51:20,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 12:51:20,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:20,787 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:20,816 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 12:51:21,000 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 12:51:21,001 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:51:21,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:21,001 INFO L82 PathProgramCache]: Analyzing trace with hash -623161511, now seen corresponding path program 75 times [2021-08-21 12:51:21,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:21,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405276985] [2021-08-21 12:51:21,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:21,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:21,222 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 64 proven. 116 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:51:21,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:21,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405276985] [2021-08-21 12:51:21,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405276985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:21,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894766748] [2021-08-21 12:51:21,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:51:21,222 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:21,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:21,223 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 12:51:21,224 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 12:51:24,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-08-21 12:51:24,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:24,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:51:24,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 12 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:51:24,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894766748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:24,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:24,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 30 [2021-08-21 12:51:24,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239579094] [2021-08-21 12:51:24,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:51:24,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:24,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:51:24,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:51:24,936 INFO L87 Difference]: Start difference. First operand 4882 states and 11778 transitions. Second operand has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:25,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:25,979 INFO L93 Difference]: Finished difference Result 7672 states and 17260 transitions. [2021-08-21 12:51:25,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 12:51:25,979 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 12:51:25,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:25,988 INFO L225 Difference]: With dead ends: 7672 [2021-08-21 12:51:25,988 INFO L226 Difference]: Without dead ends: 7669 [2021-08-21 12:51:25,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 836.3ms TimeCoverageRelationStatistics Valid=969, Invalid=4001, Unknown=0, NotChecked=0, Total=4970 [2021-08-21 12:51:25,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7669 states. [2021-08-21 12:51:26,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7669 to 2872. [2021-08-21 12:51:26,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 2.355276907001045) internal successors, (6762), 2871 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:26,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 6762 transitions. [2021-08-21 12:51:26,031 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 6762 transitions. Word has length 53 [2021-08-21 12:51:26,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:26,031 INFO L470 AbstractCegarLoop]: Abstraction has 2872 states and 6762 transitions. [2021-08-21 12:51:26,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:26,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 6762 transitions. [2021-08-21 12:51:26,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 12:51:26,033 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:26,033 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:26,059 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 12:51:26,240 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 12:51:26,240 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:51:26,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:26,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1484254207, now seen corresponding path program 76 times [2021-08-21 12:51:26,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:26,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258177985] [2021-08-21 12:51:26,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:26,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 1 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:26,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:26,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258177985] [2021-08-21 12:51:26,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258177985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:26,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729166312] [2021-08-21 12:51:26,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:51:26,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:26,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:26,449 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 12:51:26,449 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 12:51:29,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:51:29,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:29,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:51:29,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:30,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729166312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:30,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:30,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:51:30,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325746026] [2021-08-21 12:51:30,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:51:30,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:30,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:51:30,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:51:30,055 INFO L87 Difference]: Start difference. First operand 2872 states and 6762 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:30,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:30,203 INFO L93 Difference]: Finished difference Result 3935 states and 9073 transitions. [2021-08-21 12:51:30,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:51:30,203 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 12:51:30,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:30,207 INFO L225 Difference]: With dead ends: 3935 [2021-08-21 12:51:30,207 INFO L226 Difference]: Without dead ends: 3860 [2021-08-21 12:51:30,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:51:30,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2021-08-21 12:51:30,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 3443. [2021-08-21 12:51:30,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3443 states, 3442 states have (on average 2.3951191167925625) internal successors, (8244), 3442 states have internal predecessors, (8244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:30,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 8244 transitions. [2021-08-21 12:51:30,239 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 8244 transitions. Word has length 55 [2021-08-21 12:51:30,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:30,239 INFO L470 AbstractCegarLoop]: Abstraction has 3443 states and 8244 transitions. [2021-08-21 12:51:30,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:30,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 8244 transitions. [2021-08-21 12:51:30,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 12:51:30,241 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:30,241 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:30,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:30,442 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 12:51:30,442 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:51:30,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:30,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1513984983, now seen corresponding path program 77 times [2021-08-21 12:51:30,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:30,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167065142] [2021-08-21 12:51:30,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:30,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:30,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:30,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167065142] [2021-08-21 12:51:30,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167065142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:30,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612834576] [2021-08-21 12:51:30,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:51:30,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:30,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:30,783 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 12:51:30,783 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 12:51:34,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-08-21 12:51:34,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:34,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-21 12:51:34,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:35,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612834576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:35,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:35,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 43 [2021-08-21 12:51:35,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118935272] [2021-08-21 12:51:35,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-21 12:51:35,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:35,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-21 12:51:35,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1696, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 12:51:35,242 INFO L87 Difference]: Start difference. First operand 3443 states and 8244 transitions. Second operand has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:41,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:41,218 INFO L93 Difference]: Finished difference Result 7425 states and 16157 transitions. [2021-08-21 12:51:41,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-08-21 12:51:41,219 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 12:51:41,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:41,227 INFO L225 Difference]: With dead ends: 7425 [2021-08-21 12:51:41,227 INFO L226 Difference]: Without dead ends: 7401 [2021-08-21 12:51:41,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9277 ImplicationChecksByTransitivity, 3733.5ms TimeCoverageRelationStatistics Valid=2404, Invalid=24986, Unknown=0, NotChecked=0, Total=27390 [2021-08-21 12:51:41,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7401 states. [2021-08-21 12:51:41,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7401 to 3577. [2021-08-21 12:51:41,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3577 states, 3576 states have (on average 2.3987695749440716) internal successors, (8578), 3576 states have internal predecessors, (8578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3577 states to 3577 states and 8578 transitions. [2021-08-21 12:51:41,270 INFO L78 Accepts]: Start accepts. Automaton has 3577 states and 8578 transitions. Word has length 55 [2021-08-21 12:51:41,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:41,270 INFO L470 AbstractCegarLoop]: Abstraction has 3577 states and 8578 transitions. [2021-08-21 12:51:41,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:41,270 INFO L276 IsEmpty]: Start isEmpty. Operand 3577 states and 8578 transitions. [2021-08-21 12:51:41,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 12:51:41,272 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:41,272 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:41,299 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 12:51:41,473 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 12:51:41,473 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:51:41,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:41,473 INFO L82 PathProgramCache]: Analyzing trace with hash 783619073, now seen corresponding path program 78 times [2021-08-21 12:51:41,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:41,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314980244] [2021-08-21 12:51:41,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:41,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:41,931 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:41,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:41,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314980244] [2021-08-21 12:51:41,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314980244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:41,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387543902] [2021-08-21 12:51:41,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:51:41,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:41,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:41,933 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 12:51:41,968 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 12:51:45,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-08-21 12:51:45,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:45,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:51:45,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:46,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387543902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:46,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:46,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 46 [2021-08-21 12:51:46,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323148344] [2021-08-21 12:51:46,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-21 12:51:46,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:46,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-21 12:51:46,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1936, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 12:51:46,514 INFO L87 Difference]: Start difference. First operand 3577 states and 8578 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:47,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:47,858 INFO L93 Difference]: Finished difference Result 5634 states and 12714 transitions. [2021-08-21 12:51:47,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 12:51:47,858 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 12:51:47,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:47,865 INFO L225 Difference]: With dead ends: 5634 [2021-08-21 12:51:47,865 INFO L226 Difference]: Without dead ends: 5630 [2021-08-21 12:51:47,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 1221.4ms TimeCoverageRelationStatistics Valid=478, Invalid=3682, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 12:51:47,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5630 states. [2021-08-21 12:51:47,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5630 to 3763. [2021-08-21 12:51:47,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3763 states, 3762 states have (on average 2.390749601275917) internal successors, (8994), 3762 states have internal predecessors, (8994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:47,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 8994 transitions. [2021-08-21 12:51:47,909 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 8994 transitions. Word has length 55 [2021-08-21 12:51:47,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:47,909 INFO L470 AbstractCegarLoop]: Abstraction has 3763 states and 8994 transitions. [2021-08-21 12:51:47,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:47,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 8994 transitions. [2021-08-21 12:51:47,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 12:51:47,912 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:47,912 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:47,937 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 12:51:48,112 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 12:51:48,113 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:51:48,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:48,113 INFO L82 PathProgramCache]: Analyzing trace with hash 635191899, now seen corresponding path program 79 times [2021-08-21 12:51:48,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:48,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597576358] [2021-08-21 12:51:48,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:48,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:48,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:48,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597576358] [2021-08-21 12:51:48,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597576358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:48,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257553369] [2021-08-21 12:51:48,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:51:48,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:48,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:48,477 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 12:51:48,477 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 12:51:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:51,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:51:51,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:53,097 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:53,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257553369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:53,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:53,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25] total 43 [2021-08-21 12:51:53,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911335818] [2021-08-21 12:51:53,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-21 12:51:53,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:53,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-21 12:51:53,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1689, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 12:51:53,098 INFO L87 Difference]: Start difference. First operand 3763 states and 8994 transitions. Second operand has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:59,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:59,887 INFO L93 Difference]: Finished difference Result 9168 states and 19859 transitions. [2021-08-21 12:51:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-08-21 12:51:59,887 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 12:51:59,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:59,907 INFO L225 Difference]: With dead ends: 9168 [2021-08-21 12:51:59,907 INFO L226 Difference]: Without dead ends: 9120 [2021-08-21 12:51:59,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13753 ImplicationChecksByTransitivity, 4715.6ms TimeCoverageRelationStatistics Valid=3843, Invalid=34769, Unknown=0, NotChecked=0, Total=38612 [2021-08-21 12:51:59,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9120 states. [2021-08-21 12:51:59,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9120 to 3632. [2021-08-21 12:51:59,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3632 states, 3631 states have (on average 2.3952079316992565) internal successors, (8697), 3631 states have internal predecessors, (8697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:59,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3632 states to 3632 states and 8697 transitions. [2021-08-21 12:51:59,957 INFO L78 Accepts]: Start accepts. Automaton has 3632 states and 8697 transitions. Word has length 55 [2021-08-21 12:51:59,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:59,957 INFO L470 AbstractCegarLoop]: Abstraction has 3632 states and 8697 transitions. [2021-08-21 12:51:59,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:59,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3632 states and 8697 transitions. [2021-08-21 12:51:59,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 12:51:59,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:59,960 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:59,985 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 12:52:00,160 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 12:52:00,160 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:00,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:00,161 INFO L82 PathProgramCache]: Analyzing trace with hash -397713953, now seen corresponding path program 80 times [2021-08-21 12:52:00,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:00,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558626517] [2021-08-21 12:52:00,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:00,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 6 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:00,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:00,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558626517] [2021-08-21 12:52:00,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558626517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:00,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217239125] [2021-08-21 12:52:00,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:52:00,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:00,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:00,512 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 12:52:00,513 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 12:52:04,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:52:04,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:04,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 12:52:04,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 6 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:05,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217239125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:05,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:05,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25] total 44 [2021-08-21 12:52:05,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193745575] [2021-08-21 12:52:05,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-21 12:52:05,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:05,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-21 12:52:05,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1761, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 12:52:05,085 INFO L87 Difference]: Start difference. First operand 3632 states and 8697 transitions. Second operand has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:12,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:12,075 INFO L93 Difference]: Finished difference Result 10861 states and 23255 transitions. [2021-08-21 12:52:12,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-08-21 12:52:12,075 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 12:52:12,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:12,086 INFO L225 Difference]: With dead ends: 10861 [2021-08-21 12:52:12,086 INFO L226 Difference]: Without dead ends: 10783 [2021-08-21 12:52:12,088 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16619 ImplicationChecksByTransitivity, 4713.1ms TimeCoverageRelationStatistics Valid=5098, Invalid=40058, Unknown=0, NotChecked=0, Total=45156 [2021-08-21 12:52:12,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10783 states. [2021-08-21 12:52:12,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10783 to 3613. [2021-08-21 12:52:12,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 2.394795127353267) internal successors, (8650), 3612 states have internal predecessors, (8650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:12,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 8650 transitions. [2021-08-21 12:52:12,144 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 8650 transitions. Word has length 55 [2021-08-21 12:52:12,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:12,144 INFO L470 AbstractCegarLoop]: Abstraction has 3613 states and 8650 transitions. [2021-08-21 12:52:12,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:12,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 8650 transitions. [2021-08-21 12:52:12,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 12:52:12,147 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:12,147 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:12,173 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 12:52:12,347 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 12:52:12,347 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:12,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:12,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1643423331, now seen corresponding path program 81 times [2021-08-21 12:52:12,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:12,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947273714] [2021-08-21 12:52:12,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:12,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:12,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:12,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947273714] [2021-08-21 12:52:12,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947273714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:12,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064732652] [2021-08-21 12:52:12,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:52:12,652 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:12,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:12,653 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 12:52:12,654 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 12:52:16,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-08-21 12:52:16,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:16,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 12:52:16,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:17,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064732652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:17,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:17,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 45 [2021-08-21 12:52:17,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899420350] [2021-08-21 12:52:17,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-21 12:52:17,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:17,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-21 12:52:17,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1833, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 12:52:17,282 INFO L87 Difference]: Start difference. First operand 3613 states and 8650 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:23,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:23,516 INFO L93 Difference]: Finished difference Result 12877 states and 27358 transitions. [2021-08-21 12:52:23,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-08-21 12:52:23,516 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 12:52:23,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:23,532 INFO L225 Difference]: With dead ends: 12877 [2021-08-21 12:52:23,532 INFO L226 Difference]: Without dead ends: 12763 [2021-08-21 12:52:23,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15342 ImplicationChecksByTransitivity, 4504.6ms TimeCoverageRelationStatistics Valid=5445, Invalid=35967, Unknown=0, NotChecked=0, Total=41412 [2021-08-21 12:52:23,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-08-21 12:52:23,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 3596. [2021-08-21 12:52:23,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3596 states, 3595 states have (on average 2.396940194714882) internal successors, (8617), 3595 states have internal predecessors, (8617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:23,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3596 states to 3596 states and 8617 transitions. [2021-08-21 12:52:23,604 INFO L78 Accepts]: Start accepts. Automaton has 3596 states and 8617 transitions. Word has length 55 [2021-08-21 12:52:23,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:23,604 INFO L470 AbstractCegarLoop]: Abstraction has 3596 states and 8617 transitions. [2021-08-21 12:52:23,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:23,604 INFO L276 IsEmpty]: Start isEmpty. Operand 3596 states and 8617 transitions. [2021-08-21 12:52:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 12:52:23,607 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:23,607 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:23,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-21 12:52:23,812 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 12:52:23,814 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:23,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:23,814 INFO L82 PathProgramCache]: Analyzing trace with hash 257022951, now seen corresponding path program 82 times [2021-08-21 12:52:23,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:23,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541083806] [2021-08-21 12:52:23,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:23,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:24,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:24,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541083806] [2021-08-21 12:52:24,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541083806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:24,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738168526] [2021-08-21 12:52:24,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:52:24,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:24,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:24,111 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 12:52:24,112 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 12:52:27,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:52:27,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:27,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 12:52:27,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:28,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738168526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:28,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:28,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 46 [2021-08-21 12:52:28,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867032451] [2021-08-21 12:52:28,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-21 12:52:28,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:28,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-21 12:52:28,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1905, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 12:52:28,877 INFO L87 Difference]: Start difference. First operand 3596 states and 8617 transitions. Second operand has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:33,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:33,162 INFO L93 Difference]: Finished difference Result 14615 states and 30939 transitions. [2021-08-21 12:52:33,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-08-21 12:52:33,162 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 12:52:33,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:33,181 INFO L225 Difference]: With dead ends: 14615 [2021-08-21 12:52:33,182 INFO L226 Difference]: Without dead ends: 14345 [2021-08-21 12:52:33,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9901 ImplicationChecksByTransitivity, 3310.5ms TimeCoverageRelationStatistics Valid=4135, Invalid=23255, Unknown=0, NotChecked=0, Total=27390 [2021-08-21 12:52:33,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14345 states. [2021-08-21 12:52:33,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14345 to 3616. [2021-08-21 12:52:33,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3616 states, 3615 states have (on average 2.394744121715076) internal successors, (8657), 3615 states have internal predecessors, (8657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:33,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3616 states to 3616 states and 8657 transitions. [2021-08-21 12:52:33,274 INFO L78 Accepts]: Start accepts. Automaton has 3616 states and 8657 transitions. Word has length 55 [2021-08-21 12:52:33,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:33,274 INFO L470 AbstractCegarLoop]: Abstraction has 3616 states and 8657 transitions. [2021-08-21 12:52:33,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:33,274 INFO L276 IsEmpty]: Start isEmpty. Operand 3616 states and 8657 transitions. [2021-08-21 12:52:33,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 12:52:33,276 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:33,277 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:33,303 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 12:52:33,477 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 12:52:33,477 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:33,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:33,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1527988629, now seen corresponding path program 83 times [2021-08-21 12:52:33,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:33,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24435641] [2021-08-21 12:52:33,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:33,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 30 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:33,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:33,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24435641] [2021-08-21 12:52:33,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24435641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:33,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530464257] [2021-08-21 12:52:33,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:52:33,771 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:33,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:33,771 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 12:52:33,772 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 12:52:37,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-21 12:52:37,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:37,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:52:37,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:38,571 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 30 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:38,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530464257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:38,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:38,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 48 [2021-08-21 12:52:38,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613883051] [2021-08-21 12:52:38,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-21 12:52:38,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:38,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-21 12:52:38,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2053, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:52:38,572 INFO L87 Difference]: Start difference. First operand 3616 states and 8657 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:43,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:43,219 INFO L93 Difference]: Finished difference Result 15031 states and 31681 transitions. [2021-08-21 12:52:43,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-08-21 12:52:43,219 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 12:52:43,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:43,237 INFO L225 Difference]: With dead ends: 15031 [2021-08-21 12:52:43,237 INFO L226 Difference]: Without dead ends: 14626 [2021-08-21 12:52:43,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14225 ImplicationChecksByTransitivity, 3872.5ms TimeCoverageRelationStatistics Valid=6292, Invalid=30380, Unknown=0, NotChecked=0, Total=36672 [2021-08-21 12:52:43,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14626 states. [2021-08-21 12:52:43,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14626 to 3632. [2021-08-21 12:52:43,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3632 states, 3631 states have (on average 2.3930046819058113) internal successors, (8689), 3631 states have internal predecessors, (8689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:43,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3632 states to 3632 states and 8689 transitions. [2021-08-21 12:52:43,317 INFO L78 Accepts]: Start accepts. Automaton has 3632 states and 8689 transitions. Word has length 55 [2021-08-21 12:52:43,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:43,317 INFO L470 AbstractCegarLoop]: Abstraction has 3632 states and 8689 transitions. [2021-08-21 12:52:43,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:43,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3632 states and 8689 transitions. [2021-08-21 12:52:43,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 12:52:43,320 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:43,320 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:43,347 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 12:52:43,520 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 12:52:43,520 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:43,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:43,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1956704785, now seen corresponding path program 84 times [2021-08-21 12:52:43,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:43,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239401767] [2021-08-21 12:52:43,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:43,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:43,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:43,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239401767] [2021-08-21 12:52:43,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239401767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:43,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126991965] [2021-08-21 12:52:43,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:52:43,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:43,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:43,827 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 12:52:43,827 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 12:52:47,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-21 12:52:47,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:47,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 12:52:47,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:48,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126991965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:48,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:48,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 49 [2021-08-21 12:52:48,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724929447] [2021-08-21 12:52:48,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-21 12:52:48,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:48,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-21 12:52:48,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=2118, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 12:52:48,646 INFO L87 Difference]: Start difference. First operand 3632 states and 8689 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:53,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:53,837 INFO L93 Difference]: Finished difference Result 14708 states and 30856 transitions. [2021-08-21 12:52:53,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-08-21 12:52:53,837 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 12:52:53,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:53,855 INFO L225 Difference]: With dead ends: 14708 [2021-08-21 12:52:53,855 INFO L226 Difference]: Without dead ends: 14171 [2021-08-21 12:52:53,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16959 ImplicationChecksByTransitivity, 4296.1ms TimeCoverageRelationStatistics Valid=8234, Invalid=34822, Unknown=0, NotChecked=0, Total=43056 [2021-08-21 12:52:53,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14171 states. [2021-08-21 12:52:53,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14171 to 3644. [2021-08-21 12:52:53,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 3643 states have (on average 2.3917101290145486) internal successors, (8713), 3643 states have internal predecessors, (8713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:53,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 8713 transitions. [2021-08-21 12:52:53,940 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 8713 transitions. Word has length 55 [2021-08-21 12:52:53,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:53,941 INFO L470 AbstractCegarLoop]: Abstraction has 3644 states and 8713 transitions. [2021-08-21 12:52:53,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:53,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 8713 transitions. [2021-08-21 12:52:53,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 12:52:53,943 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:53,943 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:53,970 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 12:52:54,143 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 12:52:54,144 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:54,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:54,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1532136051, now seen corresponding path program 85 times [2021-08-21 12:52:54,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:54,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085237098] [2021-08-21 12:52:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:54,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:54,456 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 56 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:54,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:54,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085237098] [2021-08-21 12:52:54,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085237098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:54,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774077243] [2021-08-21 12:52:54,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:52:54,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:54,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:54,457 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 12:52:54,458 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 12:52:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:58,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 12:52:58,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 56 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:59,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774077243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:59,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:59,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-08-21 12:52:59,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120173002] [2021-08-21 12:52:59,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-21 12:52:59,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:59,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-21 12:52:59,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2100, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 12:52:59,461 INFO L87 Difference]: Start difference. First operand 3644 states and 8713 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:03,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:03,987 INFO L93 Difference]: Finished difference Result 14160 states and 30682 transitions. [2021-08-21 12:53:03,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-08-21 12:53:03,987 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 12:53:03,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:04,002 INFO L225 Difference]: With dead ends: 14160 [2021-08-21 12:53:04,002 INFO L226 Difference]: Without dead ends: 13359 [2021-08-21 12:53:04,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13248 ImplicationChecksByTransitivity, 4008.9ms TimeCoverageRelationStatistics Valid=7677, Invalid=29379, Unknown=0, NotChecked=0, Total=37056 [2021-08-21 12:53:04,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13359 states. [2021-08-21 12:53:04,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13359 to 3798. [2021-08-21 12:53:04,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 2.3429022912825914) internal successors, (8896), 3797 states have internal predecessors, (8896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:04,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 8896 transitions. [2021-08-21 12:53:04,076 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 8896 transitions. Word has length 55 [2021-08-21 12:53:04,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:04,076 INFO L470 AbstractCegarLoop]: Abstraction has 3798 states and 8896 transitions. [2021-08-21 12:53:04,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:04,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 8896 transitions. [2021-08-21 12:53:04,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 12:53:04,079 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:04,079 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:04,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-21 12:53:04,279 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 12:53:04,279 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:53:04,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:04,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1421025927, now seen corresponding path program 86 times [2021-08-21 12:53:04,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:04,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711645036] [2021-08-21 12:53:04,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:04,280 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 68 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:04,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:04,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711645036] [2021-08-21 12:53:04,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711645036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:04,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310802806] [2021-08-21 12:53:04,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:53:04,493 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:04,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:04,494 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 12:53:04,494 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 12:53:08,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:53:08,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:08,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:53:08,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 68 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:09,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310802806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:09,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:09,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26] total 41 [2021-08-21 12:53:09,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457266474] [2021-08-21 12:53:09,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 12:53:09,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:09,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 12:53:09,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1464, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:53:09,602 INFO L87 Difference]: Start difference. First operand 3798 states and 8896 transitions. Second operand has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:16,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:16,202 INFO L93 Difference]: Finished difference Result 11372 states and 25135 transitions. [2021-08-21 12:53:16,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2021-08-21 12:53:16,202 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 12:53:16,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:16,215 INFO L225 Difference]: With dead ends: 11372 [2021-08-21 12:53:16,215 INFO L226 Difference]: Without dead ends: 11368 [2021-08-21 12:53:16,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26219 ImplicationChecksByTransitivity, 6062.9ms TimeCoverageRelationStatistics Valid=11996, Invalid=49756, Unknown=0, NotChecked=0, Total=61752 [2021-08-21 12:53:16,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11368 states. [2021-08-21 12:53:16,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11368 to 3367. [2021-08-21 12:53:16,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3367 states, 3366 states have (on average 2.3499702911467617) internal successors, (7910), 3366 states have internal predecessors, (7910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3367 states to 3367 states and 7910 transitions. [2021-08-21 12:53:16,285 INFO L78 Accepts]: Start accepts. Automaton has 3367 states and 7910 transitions. Word has length 55 [2021-08-21 12:53:16,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:16,286 INFO L470 AbstractCegarLoop]: Abstraction has 3367 states and 7910 transitions. [2021-08-21 12:53:16,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:16,286 INFO L276 IsEmpty]: Start isEmpty. Operand 3367 states and 7910 transitions. [2021-08-21 12:53:16,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 12:53:16,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:16,288 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:16,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:16,488 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 12:53:16,488 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:53:16,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:16,489 INFO L82 PathProgramCache]: Analyzing trace with hash 554537791, now seen corresponding path program 87 times [2021-08-21 12:53:16,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:16,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485018849] [2021-08-21 12:53:16,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:16,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:16,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:16,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:16,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485018849] [2021-08-21 12:53:16,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485018849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:16,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132729174] [2021-08-21 12:53:16,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:53:16,815 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:16,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:16,815 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 12:53:16,816 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 12:53:20,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-08-21 12:53:20,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:20,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 12:53:20,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:22,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132729174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:22,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:22,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2021-08-21 12:53:22,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112366967] [2021-08-21 12:53:22,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-21 12:53:22,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:22,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-21 12:53:22,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=2172, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 12:53:22,024 INFO L87 Difference]: Start difference. First operand 3367 states and 7910 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:27,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:27,386 INFO L93 Difference]: Finished difference Result 5653 states and 12337 transitions. [2021-08-21 12:53:27,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-08-21 12:53:27,386 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 12:53:27,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:27,391 INFO L225 Difference]: With dead ends: 5653 [2021-08-21 12:53:27,391 INFO L226 Difference]: Without dead ends: 5275 [2021-08-21 12:53:27,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18266 ImplicationChecksByTransitivity, 4772.2ms TimeCoverageRelationStatistics Valid=12509, Invalid=34797, Unknown=0, NotChecked=0, Total=47306 [2021-08-21 12:53:27,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5275 states. [2021-08-21 12:53:27,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5275 to 3364. [2021-08-21 12:53:27,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3364 states, 3363 states have (on average 2.3452274754683318) internal successors, (7887), 3363 states have internal predecessors, (7887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:27,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3364 states to 3364 states and 7887 transitions. [2021-08-21 12:53:27,428 INFO L78 Accepts]: Start accepts. Automaton has 3364 states and 7887 transitions. Word has length 57 [2021-08-21 12:53:27,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:27,428 INFO L470 AbstractCegarLoop]: Abstraction has 3364 states and 7887 transitions. [2021-08-21 12:53:27,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:27,428 INFO L276 IsEmpty]: Start isEmpty. Operand 3364 states and 7887 transitions. [2021-08-21 12:53:27,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 12:53:27,430 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:27,430 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:27,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:27,630 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 12:53:27,631 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:53:27,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:27,631 INFO L82 PathProgramCache]: Analyzing trace with hash -880443627, now seen corresponding path program 88 times [2021-08-21 12:53:27,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:27,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305998890] [2021-08-21 12:53:27,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:27,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:27,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:27,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305998890] [2021-08-21 12:53:27,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305998890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:27,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671579698] [2021-08-21 12:53:27,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:53:27,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:27,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:27,824 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 12:53:27,824 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 12:53:31,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:53:31,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:31,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:53:31,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:33,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671579698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:33,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:33,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 26] total 39 [2021-08-21 12:53:33,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374520023] [2021-08-21 12:53:33,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 12:53:33,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:33,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 12:53:33,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1236, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:53:33,017 INFO L87 Difference]: Start difference. First operand 3364 states and 7887 transitions. Second operand has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:37,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:37,944 INFO L93 Difference]: Finished difference Result 4870 states and 10847 transitions. [2021-08-21 12:53:37,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-08-21 12:53:37,944 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 12:53:37,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:37,949 INFO L225 Difference]: With dead ends: 4870 [2021-08-21 12:53:37,949 INFO L226 Difference]: Without dead ends: 4866 [2021-08-21 12:53:37,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17310 ImplicationChecksByTransitivity, 4696.9ms TimeCoverageRelationStatistics Valid=9852, Invalid=32378, Unknown=0, NotChecked=0, Total=42230 [2021-08-21 12:53:37,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2021-08-21 12:53:37,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 3364. [2021-08-21 12:53:37,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3364 states, 3363 states have (on average 2.344930121914957) internal successors, (7886), 3363 states have internal predecessors, (7886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:37,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3364 states to 3364 states and 7886 transitions. [2021-08-21 12:53:37,984 INFO L78 Accepts]: Start accepts. Automaton has 3364 states and 7886 transitions. Word has length 57 [2021-08-21 12:53:37,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:37,984 INFO L470 AbstractCegarLoop]: Abstraction has 3364 states and 7886 transitions. [2021-08-21 12:53:37,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:37,984 INFO L276 IsEmpty]: Start isEmpty. Operand 3364 states and 7886 transitions. [2021-08-21 12:53:37,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 12:53:37,986 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:37,986 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:38,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-21 12:53:38,187 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 12:53:38,187 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:53:38,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:38,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1257305323, now seen corresponding path program 89 times [2021-08-21 12:53:38,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:38,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241545574] [2021-08-21 12:53:38,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:38,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 81 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:53:38,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:38,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241545574] [2021-08-21 12:53:38,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241545574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:38,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546184374] [2021-08-21 12:53:38,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:53:38,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:38,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:38,388 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 12:53:38,388 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 12:53:42,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-08-21 12:53:42,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:42,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-21 12:53:42,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:43,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546184374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:43,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:43,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26] total 40 [2021-08-21 12:53:43,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312213432] [2021-08-21 12:53:43,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 12:53:43,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:43,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 12:53:43,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1425, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 12:53:43,586 INFO L87 Difference]: Start difference. First operand 3364 states and 7886 transitions. Second operand has 41 states, 41 states have (on average 2.658536585365854) internal successors, (109), 40 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:46,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:46,595 INFO L93 Difference]: Finished difference Result 8997 states and 20267 transitions. [2021-08-21 12:53:46,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-08-21 12:53:46,595 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.658536585365854) internal successors, (109), 40 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 12:53:46,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:46,606 INFO L225 Difference]: With dead ends: 8997 [2021-08-21 12:53:46,606 INFO L226 Difference]: Without dead ends: 8988 [2021-08-21 12:53:46,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4334 ImplicationChecksByTransitivity, 2279.9ms TimeCoverageRelationStatistics Valid=2464, Invalid=12298, Unknown=0, NotChecked=0, Total=14762 [2021-08-21 12:53:46,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8988 states. [2021-08-21 12:53:46,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8988 to 6139. [2021-08-21 12:53:46,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6139 states, 6138 states have (on average 2.388400130335614) internal successors, (14660), 6138 states have internal predecessors, (14660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:46,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6139 states to 6139 states and 14660 transitions. [2021-08-21 12:53:46,680 INFO L78 Accepts]: Start accepts. Automaton has 6139 states and 14660 transitions. Word has length 57 [2021-08-21 12:53:46,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:46,680 INFO L470 AbstractCegarLoop]: Abstraction has 6139 states and 14660 transitions. [2021-08-21 12:53:46,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.658536585365854) internal successors, (109), 40 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:46,680 INFO L276 IsEmpty]: Start isEmpty. Operand 6139 states and 14660 transitions. [2021-08-21 12:53:46,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:53:46,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:46,685 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:46,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:46,886 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 12:53:46,886 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:53:46,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:46,886 INFO L82 PathProgramCache]: Analyzing trace with hash -588351939, now seen corresponding path program 90 times [2021-08-21 12:53:46,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:46,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214158289] [2021-08-21 12:53:46,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:46,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 1 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:47,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:47,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214158289] [2021-08-21 12:53:47,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214158289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:47,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551731595] [2021-08-21 12:53:47,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:53:47,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:47,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:47,078 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 12:53:47,078 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 12:53:51,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-21 12:53:51,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:51,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 12:53:51,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 64 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:51,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551731595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:51,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:51,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24] total 25 [2021-08-21 12:53:51,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072884301] [2021-08-21 12:53:51,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:53:51,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:51,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:53:51,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:53:51,918 INFO L87 Difference]: Start difference. First operand 6139 states and 14660 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:52,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:52,226 INFO L93 Difference]: Finished difference Result 7799 states and 18454 transitions. [2021-08-21 12:53:52,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:53:52,226 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:53:52,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:52,236 INFO L225 Difference]: With dead ends: 7799 [2021-08-21 12:53:52,236 INFO L226 Difference]: Without dead ends: 7709 [2021-08-21 12:53:52,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 314.1ms TimeCoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:53:52,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7709 states. [2021-08-21 12:53:52,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7709 to 6749. [2021-08-21 12:53:52,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6749 states, 6748 states have (on average 2.4058980438648487) internal successors, (16235), 6748 states have internal predecessors, (16235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:52,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6749 states to 6749 states and 16235 transitions. [2021-08-21 12:53:52,311 INFO L78 Accepts]: Start accepts. Automaton has 6749 states and 16235 transitions. Word has length 59 [2021-08-21 12:53:52,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:52,311 INFO L470 AbstractCegarLoop]: Abstraction has 6749 states and 16235 transitions. [2021-08-21 12:53:52,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 6749 states and 16235 transitions. [2021-08-21 12:53:52,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:53:52,316 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:52,316 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:52,344 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 12:53:52,516 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 12:53:52,517 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:53:52,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:52,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1256771773, now seen corresponding path program 91 times [2021-08-21 12:53:52,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:52,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639323151] [2021-08-21 12:53:52,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:52,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:52,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:52,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639323151] [2021-08-21 12:53:52,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639323151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:52,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493704116] [2021-08-21 12:53:52,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:53:52,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:52,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:52,878 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 12:53:52,880 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 12:53:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:57,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 64 conjunts are in the unsatisfiable core [2021-08-21 12:53:57,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:58,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493704116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:58,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:58,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28] total 44 [2021-08-21 12:53:58,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187888470] [2021-08-21 12:53:58,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-21 12:53:58,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:58,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-21 12:53:58,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1776, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 12:53:58,445 INFO L87 Difference]: Start difference. First operand 6749 states and 16235 transitions. Second operand has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:04,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:04,524 INFO L93 Difference]: Finished difference Result 9562 states and 22012 transitions. [2021-08-21 12:54:04,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-08-21 12:54:04,524 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:54:04,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:04,534 INFO L225 Difference]: With dead ends: 9562 [2021-08-21 12:54:04,534 INFO L226 Difference]: Without dead ends: 9558 [2021-08-21 12:54:04,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7358 ImplicationChecksByTransitivity, 3764.4ms TimeCoverageRelationStatistics Valid=1943, Invalid=21619, Unknown=0, NotChecked=0, Total=23562 [2021-08-21 12:54:04,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9558 states. [2021-08-21 12:54:04,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9558 to 6730. [2021-08-21 12:54:04,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6730 states, 6729 states have (on average 2.4135829989597264) internal successors, (16241), 6729 states have internal predecessors, (16241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:04,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6730 states to 6730 states and 16241 transitions. [2021-08-21 12:54:04,611 INFO L78 Accepts]: Start accepts. Automaton has 6730 states and 16241 transitions. Word has length 59 [2021-08-21 12:54:04,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:04,611 INFO L470 AbstractCegarLoop]: Abstraction has 6730 states and 16241 transitions. [2021-08-21 12:54:04,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:04,611 INFO L276 IsEmpty]: Start isEmpty. Operand 6730 states and 16241 transitions. [2021-08-21 12:54:04,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:54:04,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:04,616 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:04,644 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 12:54:04,816 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 12:54:04,817 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:54:04,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:04,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1300336407, now seen corresponding path program 92 times [2021-08-21 12:54:04,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:04,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827093270] [2021-08-21 12:54:04,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:04,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:05,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:05,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827093270] [2021-08-21 12:54:05,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827093270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:05,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401475694] [2021-08-21 12:54:05,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:54:05,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:05,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:05,219 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 12:54:05,219 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 12:54:09,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:54:09,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:09,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-21 12:54:09,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:10,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401475694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:10,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:10,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 46 [2021-08-21 12:54:10,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001614226] [2021-08-21 12:54:10,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-21 12:54:10,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:10,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-21 12:54:10,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1943, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 12:54:10,962 INFO L87 Difference]: Start difference. First operand 6730 states and 16241 transitions. Second operand has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:18,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:18,945 INFO L93 Difference]: Finished difference Result 14753 states and 32967 transitions. [2021-08-21 12:54:18,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2021-08-21 12:54:18,946 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:54:18,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:18,962 INFO L225 Difference]: With dead ends: 14753 [2021-08-21 12:54:18,962 INFO L226 Difference]: Without dead ends: 14705 [2021-08-21 12:54:18,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17389 ImplicationChecksByTransitivity, 5195.0ms TimeCoverageRelationStatistics Valid=4375, Invalid=43805, Unknown=0, NotChecked=0, Total=48180 [2021-08-21 12:54:18,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14705 states. [2021-08-21 12:54:19,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14705 to 6416. [2021-08-21 12:54:19,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6416 states, 6415 states have (on average 2.4120031176929073) internal successors, (15473), 6415 states have internal predecessors, (15473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:19,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6416 states to 6416 states and 15473 transitions. [2021-08-21 12:54:19,086 INFO L78 Accepts]: Start accepts. Automaton has 6416 states and 15473 transitions. Word has length 59 [2021-08-21 12:54:19,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:19,086 INFO L470 AbstractCegarLoop]: Abstraction has 6416 states and 15473 transitions. [2021-08-21 12:54:19,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:19,086 INFO L276 IsEmpty]: Start isEmpty. Operand 6416 states and 15473 transitions. [2021-08-21 12:54:19,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:54:19,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:19,091 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:19,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-21 12:54:19,291 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 12:54:19,292 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:54:19,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:19,292 INFO L82 PathProgramCache]: Analyzing trace with hash 87964315, now seen corresponding path program 93 times [2021-08-21 12:54:19,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:19,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992164649] [2021-08-21 12:54:19,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:19,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:19,683 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 6 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:19,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:19,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992164649] [2021-08-21 12:54:19,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992164649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:19,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829264735] [2021-08-21 12:54:19,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:54:19,683 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:19,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:19,684 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 12:54:19,685 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 12:54:24,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-08-21 12:54:24,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:24,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-21 12:54:24,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 6 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:25,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829264735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:25,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:25,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27] total 47 [2021-08-21 12:54:25,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101419955] [2021-08-21 12:54:25,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-21 12:54:25,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:25,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-21 12:54:25,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2020, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 12:54:25,383 INFO L87 Difference]: Start difference. First operand 6416 states and 15473 transitions. Second operand has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:34,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:34,856 INFO L93 Difference]: Finished difference Result 16765 states and 37179 transitions. [2021-08-21 12:54:34,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2021-08-21 12:54:34,856 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:54:34,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:34,875 INFO L225 Difference]: With dead ends: 16765 [2021-08-21 12:54:34,875 INFO L226 Difference]: Without dead ends: 16687 [2021-08-21 12:54:34,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22172 ImplicationChecksByTransitivity, 6156.5ms TimeCoverageRelationStatistics Valid=6045, Invalid=53247, Unknown=0, NotChecked=0, Total=59292 [2021-08-21 12:54:34,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16687 states. [2021-08-21 12:54:34,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16687 to 6386. [2021-08-21 12:54:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6386 states, 6385 states have (on average 2.4117462803445577) internal successors, (15399), 6385 states have internal predecessors, (15399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:34,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6386 states to 6386 states and 15399 transitions. [2021-08-21 12:54:34,992 INFO L78 Accepts]: Start accepts. Automaton has 6386 states and 15399 transitions. Word has length 59 [2021-08-21 12:54:34,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:34,992 INFO L470 AbstractCegarLoop]: Abstraction has 6386 states and 15399 transitions. [2021-08-21 12:54:34,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand 6386 states and 15399 transitions. [2021-08-21 12:54:34,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:54:34,997 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:34,997 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:35,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-21 12:54:35,197 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 12:54:35,197 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:54:35,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:35,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1460736799, now seen corresponding path program 94 times [2021-08-21 12:54:35,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:35,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521484309] [2021-08-21 12:54:35,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:35,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:35,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:35,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521484309] [2021-08-21 12:54:35,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521484309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:35,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101579238] [2021-08-21 12:54:35,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:54:35,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:35,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:35,631 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 12:54:35,632 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 12:54:40,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:54:40,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:40,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:54:40,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:41,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101579238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:41,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:41,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27] total 48 [2021-08-21 12:54:41,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850270527] [2021-08-21 12:54:41,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-21 12:54:41,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:41,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-21 12:54:41,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=2097, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:54:41,489 INFO L87 Difference]: Start difference. First operand 6386 states and 15399 transitions. Second operand has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 48 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:49,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:49,998 INFO L93 Difference]: Finished difference Result 19207 states and 42385 transitions. [2021-08-21 12:54:49,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2021-08-21 12:54:49,999 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 48 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:54:49,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:50,026 INFO L225 Difference]: With dead ends: 19207 [2021-08-21 12:54:50,026 INFO L226 Difference]: Without dead ends: 19093 [2021-08-21 12:54:50,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22463 ImplicationChecksByTransitivity, 5784.0ms TimeCoverageRelationStatistics Valid=6948, Invalid=52344, Unknown=0, NotChecked=0, Total=59292 [2021-08-21 12:54:50,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19093 states. [2021-08-21 12:54:50,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19093 to 6320. [2021-08-21 12:54:50,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6320 states, 6319 states have (on average 2.413831302421269) internal successors, (15253), 6319 states have internal predecessors, (15253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:50,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6320 states to 6320 states and 15253 transitions. [2021-08-21 12:54:50,145 INFO L78 Accepts]: Start accepts. Automaton has 6320 states and 15253 transitions. Word has length 59 [2021-08-21 12:54:50,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:50,145 INFO L470 AbstractCegarLoop]: Abstraction has 6320 states and 15253 transitions. [2021-08-21 12:54:50,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 48 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:50,145 INFO L276 IsEmpty]: Start isEmpty. Operand 6320 states and 15253 transitions. [2021-08-21 12:54:50,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:54:50,149 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:50,149 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:50,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-21 12:54:50,352 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 12:54:50,352 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:54:50,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:50,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2020858019, now seen corresponding path program 95 times [2021-08-21 12:54:50,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:50,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496710479] [2021-08-21 12:54:50,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:50,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 20 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:50,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:50,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496710479] [2021-08-21 12:54:50,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496710479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:50,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125679719] [2021-08-21 12:54:50,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:54:50,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:50,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:50,704 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 12:54:50,704 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 12:54:55,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-08-21 12:54:55,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:55,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-21 12:54:55,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 20 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:56,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125679719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:56,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:56,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28] total 50 [2021-08-21 12:54:56,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002467254] [2021-08-21 12:54:56,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-21 12:54:56,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:56,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-21 12:54:56,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2259, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 12:54:56,436 INFO L87 Difference]: Start difference. First operand 6320 states and 15253 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:02,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:02,980 INFO L93 Difference]: Finished difference Result 21738 states and 47694 transitions. [2021-08-21 12:55:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-08-21 12:55:02,981 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:55:02,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:03,009 INFO L225 Difference]: With dead ends: 21738 [2021-08-21 12:55:03,010 INFO L226 Difference]: Without dead ends: 21435 [2021-08-21 12:55:03,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17294 ImplicationChecksByTransitivity, 5049.3ms TimeCoverageRelationStatistics Valid=6385, Invalid=38771, Unknown=0, NotChecked=0, Total=45156 [2021-08-21 12:55:03,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21435 states. [2021-08-21 12:55:03,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21435 to 6312. [2021-08-21 12:55:03,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6312 states, 6311 states have (on average 2.4143558865472983) internal successors, (15237), 6311 states have internal predecessors, (15237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:03,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6312 states to 6312 states and 15237 transitions. [2021-08-21 12:55:03,164 INFO L78 Accepts]: Start accepts. Automaton has 6312 states and 15237 transitions. Word has length 59 [2021-08-21 12:55:03,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:03,164 INFO L470 AbstractCegarLoop]: Abstraction has 6312 states and 15237 transitions. [2021-08-21 12:55:03,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:03,164 INFO L276 IsEmpty]: Start isEmpty. Operand 6312 states and 15237 transitions. [2021-08-21 12:55:03,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:55:03,169 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:03,169 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:03,198 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 12:55:03,369 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 12:55:03,370 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:55:03,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:03,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1762637017, now seen corresponding path program 96 times [2021-08-21 12:55:03,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:03,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729347975] [2021-08-21 12:55:03,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:03,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 30 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:03,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:03,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729347975] [2021-08-21 12:55:03,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729347975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:03,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674332341] [2021-08-21 12:55:03,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:55:03,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:03,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:03,766 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 12:55:03,766 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 12:55:08,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-08-21 12:55:08,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:08,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 12:55:08,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 30 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:09,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674332341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:09,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:09,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 50 [2021-08-21 12:55:09,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445966302] [2021-08-21 12:55:09,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-21 12:55:09,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:09,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-21 12:55:09,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2250, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 12:55:09,831 INFO L87 Difference]: Start difference. First operand 6312 states and 15237 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:15,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:15,733 INFO L93 Difference]: Finished difference Result 23651 states and 51796 transitions. [2021-08-21 12:55:15,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-08-21 12:55:15,734 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:55:15,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:15,767 INFO L225 Difference]: With dead ends: 23651 [2021-08-21 12:55:15,767 INFO L226 Difference]: Without dead ends: 23225 [2021-08-21 12:55:15,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14276 ImplicationChecksByTransitivity, 4430.1ms TimeCoverageRelationStatistics Valid=5883, Invalid=32337, Unknown=0, NotChecked=0, Total=38220 [2021-08-21 12:55:15,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23225 states. [2021-08-21 12:55:15,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23225 to 6344. [2021-08-21 12:55:15,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6344 states, 6343 states have (on average 2.412265489516002) internal successors, (15301), 6343 states have internal predecessors, (15301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:15,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6344 states to 6344 states and 15301 transitions. [2021-08-21 12:55:15,983 INFO L78 Accepts]: Start accepts. Automaton has 6344 states and 15301 transitions. Word has length 59 [2021-08-21 12:55:15,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:15,983 INFO L470 AbstractCegarLoop]: Abstraction has 6344 states and 15301 transitions. [2021-08-21 12:55:15,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:15,983 INFO L276 IsEmpty]: Start isEmpty. Operand 6344 states and 15301 transitions. [2021-08-21 12:55:15,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:55:15,987 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:15,987 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:16,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-21 12:55:16,188 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 12:55:16,188 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:55:16,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:16,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1411394219, now seen corresponding path program 97 times [2021-08-21 12:55:16,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:16,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435820097] [2021-08-21 12:55:16,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:16,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:16,548 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 42 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:16,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:16,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435820097] [2021-08-21 12:55:16,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435820097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:16,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860985148] [2021-08-21 12:55:16,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:55:16,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:16,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:16,550 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 12:55:16,550 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 12:55:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:21,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:55:21,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 42 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:22,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860985148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:22,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:22,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 52 [2021-08-21 12:55:22,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346530425] [2021-08-21 12:55:22,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-21 12:55:22,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:22,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-21 12:55:22,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=2407, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 12:55:22,795 INFO L87 Difference]: Start difference. First operand 6344 states and 15301 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:28,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:28,913 INFO L93 Difference]: Finished difference Result 23260 states and 50663 transitions. [2021-08-21 12:55:28,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2021-08-21 12:55:28,913 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:55:28,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:28,945 INFO L225 Difference]: With dead ends: 23260 [2021-08-21 12:55:28,945 INFO L226 Difference]: Without dead ends: 22666 [2021-08-21 12:55:28,950 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19455 ImplicationChecksByTransitivity, 5184.6ms TimeCoverageRelationStatistics Valid=8761, Invalid=41191, Unknown=0, NotChecked=0, Total=49952 [2021-08-21 12:55:28,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22666 states. [2021-08-21 12:55:29,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22666 to 6368. [2021-08-21 12:55:29,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6368 states, 6367 states have (on average 2.4107114810742893) internal successors, (15349), 6367 states have internal predecessors, (15349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:29,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6368 states to 6368 states and 15349 transitions. [2021-08-21 12:55:29,105 INFO L78 Accepts]: Start accepts. Automaton has 6368 states and 15349 transitions. Word has length 59 [2021-08-21 12:55:29,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:29,105 INFO L470 AbstractCegarLoop]: Abstraction has 6368 states and 15349 transitions. [2021-08-21 12:55:29,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:29,106 INFO L276 IsEmpty]: Start isEmpty. Operand 6368 states and 15349 transitions. [2021-08-21 12:55:29,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:55:29,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:29,111 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:29,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-21 12:55:29,311 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 12:55:29,311 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:55:29,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:29,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1101870895, now seen corresponding path program 98 times [2021-08-21 12:55:29,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:29,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572532868] [2021-08-21 12:55:29,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:29,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 56 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:29,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:29,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572532868] [2021-08-21 12:55:29,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572532868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:29,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766228363] [2021-08-21 12:55:29,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:55:29,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:29,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:29,737 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 12:55:29,738 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 12:55:34,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:55:34,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:34,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:55:34,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 56 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:35,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766228363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:35,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:35,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-08-21 12:55:35,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114239096] [2021-08-21 12:55:35,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-21 12:55:35,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:35,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-21 12:55:35,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=2390, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 12:55:35,897 INFO L87 Difference]: Start difference. First operand 6368 states and 15349 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:41,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:41,756 INFO L93 Difference]: Finished difference Result 22353 states and 48544 transitions. [2021-08-21 12:55:41,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2021-08-21 12:55:41,756 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:55:41,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:41,785 INFO L225 Difference]: With dead ends: 22353 [2021-08-21 12:55:41,786 INFO L226 Difference]: Without dead ends: 21603 [2021-08-21 12:55:41,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19181 ImplicationChecksByTransitivity, 4907.6ms TimeCoverageRelationStatistics Valid=9582, Invalid=40370, Unknown=0, NotChecked=0, Total=49952 [2021-08-21 12:55:41,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21603 states. [2021-08-21 12:55:41,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21603 to 7176. [2021-08-21 12:55:41,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7176 states, 7175 states have (on average 2.399581881533101) internal successors, (17217), 7175 states have internal predecessors, (17217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:41,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7176 states to 7176 states and 17217 transitions. [2021-08-21 12:55:41,992 INFO L78 Accepts]: Start accepts. Automaton has 7176 states and 17217 transitions. Word has length 59 [2021-08-21 12:55:41,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:41,993 INFO L470 AbstractCegarLoop]: Abstraction has 7176 states and 17217 transitions. [2021-08-21 12:55:41,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:41,993 INFO L276 IsEmpty]: Start isEmpty. Operand 7176 states and 17217 transitions. [2021-08-21 12:55:41,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:55:41,998 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:41,998 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:42,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-21 12:55:42,198 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 12:55:42,198 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:55:42,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:42,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1565601971, now seen corresponding path program 99 times [2021-08-21 12:55:42,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:42,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806479927] [2021-08-21 12:55:42,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:42,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 72 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:42,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:42,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806479927] [2021-08-21 12:55:42,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806479927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:42,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84362618] [2021-08-21 12:55:42,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:55:42,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:42,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:42,587 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 12:55:42,588 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 12:55:47,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-08-21 12:55:47,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:47,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:55:47,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 72 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:48,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84362618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:48,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:48,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-08-21 12:55:48,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333414972] [2021-08-21 12:55:48,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-21 12:55:48,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:48,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-21 12:55:48,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=2454, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 12:55:48,783 INFO L87 Difference]: Start difference. First operand 7176 states and 17217 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:54,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:54,857 INFO L93 Difference]: Finished difference Result 19012 states and 41884 transitions. [2021-08-21 12:55:54,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-08-21 12:55:54,858 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:55:54,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:54,879 INFO L225 Difference]: With dead ends: 19012 [2021-08-21 12:55:54,879 INFO L226 Difference]: Without dead ends: 18139 [2021-08-21 12:55:54,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18126 ImplicationChecksByTransitivity, 5364.2ms TimeCoverageRelationStatistics Valid=10369, Invalid=38693, Unknown=0, NotChecked=0, Total=49062 [2021-08-21 12:55:54,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18139 states. [2021-08-21 12:55:54,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18139 to 7066. [2021-08-21 12:55:54,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7066 states, 7065 states have (on average 2.3869780608634112) internal successors, (16864), 7065 states have internal predecessors, (16864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:55,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7066 states to 7066 states and 16864 transitions. [2021-08-21 12:55:55,006 INFO L78 Accepts]: Start accepts. Automaton has 7066 states and 16864 transitions. Word has length 59 [2021-08-21 12:55:55,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:55,006 INFO L470 AbstractCegarLoop]: Abstraction has 7066 states and 16864 transitions. [2021-08-21 12:55:55,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:55,006 INFO L276 IsEmpty]: Start isEmpty. Operand 7066 states and 16864 transitions. [2021-08-21 12:55:55,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:55:55,012 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:55,012 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:55,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-21 12:55:55,212 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 12:55:55,213 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:55:55,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:55,213 INFO L82 PathProgramCache]: Analyzing trace with hash -712953915, now seen corresponding path program 100 times [2021-08-21 12:55:55,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:55,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460092189] [2021-08-21 12:55:55,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:55,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 102 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:55,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:55,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460092189] [2021-08-21 12:55:55,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460092189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:55,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577498306] [2021-08-21 12:55:55,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:55:55,438 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:55,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:55,439 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 12:55:55,439 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 12:56:00,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:56:00,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:00,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 12:56:00,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 102 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:01,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577498306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:01,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:01,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28] total 43 [2021-08-21 12:56:01,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289660229] [2021-08-21 12:56:01,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-21 12:56:01,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:01,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-21 12:56:01,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 12:56:01,717 INFO L87 Difference]: Start difference. First operand 7066 states and 16864 transitions. Second operand has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:11,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:11,182 INFO L93 Difference]: Finished difference Result 14670 states and 32855 transitions. [2021-08-21 12:56:11,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 281 states. [2021-08-21 12:56:11,183 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:56:11,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:11,200 INFO L225 Difference]: With dead ends: 14670 [2021-08-21 12:56:11,200 INFO L226 Difference]: Without dead ends: 14666 [2021-08-21 12:56:11,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 318 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46972 ImplicationChecksByTransitivity, 8595.1ms TimeCoverageRelationStatistics Valid=21531, Invalid=80549, Unknown=0, NotChecked=0, Total=102080 [2021-08-21 12:56:11,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14666 states. [2021-08-21 12:56:11,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14666 to 7547. [2021-08-21 12:56:11,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7547 states, 7546 states have (on average 2.4033925258415056) internal successors, (18136), 7546 states have internal predecessors, (18136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:11,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7547 states to 7547 states and 18136 transitions. [2021-08-21 12:56:11,318 INFO L78 Accepts]: Start accepts. Automaton has 7547 states and 18136 transitions. Word has length 59 [2021-08-21 12:56:11,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:11,318 INFO L470 AbstractCegarLoop]: Abstraction has 7547 states and 18136 transitions. [2021-08-21 12:56:11,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:11,318 INFO L276 IsEmpty]: Start isEmpty. Operand 7547 states and 18136 transitions. [2021-08-21 12:56:11,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 12:56:11,324 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:11,324 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:11,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-21 12:56:11,537 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 12:56:11,537 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:56:11,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:11,537 INFO L82 PathProgramCache]: Analyzing trace with hash 218506875, now seen corresponding path program 101 times [2021-08-21 12:56:11,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:11,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077798834] [2021-08-21 12:56:11,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:11,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:11,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:11,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077798834] [2021-08-21 12:56:11,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077798834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:11,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549784304] [2021-08-21 12:56:11,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:56:11,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:11,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:11,956 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 12:56:11,956 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 12:56:17,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-08-21 12:56:17,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:17,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 12:56:17,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:18,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549784304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:18,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:18,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 55 [2021-08-21 12:56:18,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055426432] [2021-08-21 12:56:18,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-08-21 12:56:18,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:18,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-08-21 12:56:18,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=2528, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 12:56:18,157 INFO L87 Difference]: Start difference. First operand 7547 states and 18136 transitions. Second operand has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:25,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:25,019 INFO L93 Difference]: Finished difference Result 10905 states and 24996 transitions. [2021-08-21 12:56:25,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-08-21 12:56:25,020 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 12:56:25,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:25,033 INFO L225 Difference]: With dead ends: 10905 [2021-08-21 12:56:25,033 INFO L226 Difference]: Without dead ends: 10428 [2021-08-21 12:56:25,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24679 ImplicationChecksByTransitivity, 6014.7ms TimeCoverageRelationStatistics Valid=16440, Invalid=45312, Unknown=0, NotChecked=0, Total=61752 [2021-08-21 12:56:25,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10428 states. [2021-08-21 12:56:25,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10428 to 7416. [2021-08-21 12:56:25,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7416 states, 7415 states have (on average 2.3995954146999328) internal successors, (17793), 7415 states have internal predecessors, (17793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:25,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 17793 transitions. [2021-08-21 12:56:25,162 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 17793 transitions. Word has length 61 [2021-08-21 12:56:25,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:25,162 INFO L470 AbstractCegarLoop]: Abstraction has 7416 states and 17793 transitions. [2021-08-21 12:56:25,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:25,162 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 17793 transitions. [2021-08-21 12:56:25,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 12:56:25,168 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:25,168 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:25,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-21 12:56:25,368 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 12:56:25,369 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:56:25,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:25,369 INFO L82 PathProgramCache]: Analyzing trace with hash 970555797, now seen corresponding path program 102 times [2021-08-21 12:56:25,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:25,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531008438] [2021-08-21 12:56:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:25,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:25,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:25,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531008438] [2021-08-21 12:56:25,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531008438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:25,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129960870] [2021-08-21 12:56:25,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:56:25,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:25,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:25,584 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 12:56:25,584 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 12:56:30,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-08-21 12:56:30,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:30,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-21 12:56:30,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:32,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129960870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:32,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:32,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 29] total 43 [2021-08-21 12:56:32,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259394398] [2021-08-21 12:56:32,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-21 12:56:32,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:32,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-21 12:56:32,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1527, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 12:56:32,075 INFO L87 Difference]: Start difference. First operand 7416 states and 17793 transitions. Second operand has 44 states, 44 states have (on average 2.5681818181818183) internal successors, (113), 43 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:44,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:44,716 INFO L93 Difference]: Finished difference Result 9573 states and 22051 transitions. [2021-08-21 12:56:44,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 330 states. [2021-08-21 12:56:44,716 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.5681818181818183) internal successors, (113), 43 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 12:56:44,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:44,726 INFO L225 Difference]: With dead ends: 9573 [2021-08-21 12:56:44,726 INFO L226 Difference]: Without dead ends: 9569 [2021-08-21 12:56:44,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 367 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64391 ImplicationChecksByTransitivity, 11932.2ms TimeCoverageRelationStatistics Valid=28955, Invalid=106837, Unknown=0, NotChecked=0, Total=135792 [2021-08-21 12:56:44,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9569 states. [2021-08-21 12:56:44,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9569 to 7372. [2021-08-21 12:56:44,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7372 states, 7371 states have (on average 2.401845068511735) internal successors, (17704), 7371 states have internal predecessors, (17704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:44,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7372 states to 7372 states and 17704 transitions. [2021-08-21 12:56:44,809 INFO L78 Accepts]: Start accepts. Automaton has 7372 states and 17704 transitions. Word has length 61 [2021-08-21 12:56:44,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:44,809 INFO L470 AbstractCegarLoop]: Abstraction has 7372 states and 17704 transitions. [2021-08-21 12:56:44,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.5681818181818183) internal successors, (113), 43 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:44,809 INFO L276 IsEmpty]: Start isEmpty. Operand 7372 states and 17704 transitions. [2021-08-21 12:56:44,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-21 12:56:44,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:44,815 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:44,848 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 12:56:45,015 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 12:56:45,016 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:56:45,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:45,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1391515015, now seen corresponding path program 103 times [2021-08-21 12:56:45,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:45,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628470870] [2021-08-21 12:56:45,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:45,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:45,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:45,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628470870] [2021-08-21 12:56:45,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628470870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:45,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902896368] [2021-08-21 12:56:45,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:56:45,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:45,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:45,237 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 12:56:45,237 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 12:56:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:50,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:56:50,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:50,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902896368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:50,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:50,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-21 12:56:50,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527281727] [2021-08-21 12:56:50,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:56:50,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:50,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:56:50,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:56:50,720 INFO L87 Difference]: Start difference. First operand 7372 states and 17704 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:50,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:50,929 INFO L93 Difference]: Finished difference Result 9231 states and 21992 transitions. [2021-08-21 12:56:50,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:56:50,929 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-08-21 12:56:50,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:50,941 INFO L225 Difference]: With dead ends: 9231 [2021-08-21 12:56:50,941 INFO L226 Difference]: Without dead ends: 9144 [2021-08-21 12:56:50,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:56:50,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9144 states. [2021-08-21 12:56:51,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9144 to 8571. [2021-08-21 12:56:51,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8571 states, 8570 states have (on average 2.436639439906651) internal successors, (20882), 8570 states have internal predecessors, (20882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:51,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8571 states to 8571 states and 20882 transitions. [2021-08-21 12:56:51,044 INFO L78 Accepts]: Start accepts. Automaton has 8571 states and 20882 transitions. Word has length 63 [2021-08-21 12:56:51,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:51,044 INFO L470 AbstractCegarLoop]: Abstraction has 8571 states and 20882 transitions. [2021-08-21 12:56:51,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:51,044 INFO L276 IsEmpty]: Start isEmpty. Operand 8571 states and 20882 transitions. [2021-08-21 12:56:51,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-21 12:56:51,052 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:51,052 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:51,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-21 12:56:51,252 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 12:56:51,252 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:56:51,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:51,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1351434417, now seen corresponding path program 104 times [2021-08-21 12:56:51,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:51,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59225727] [2021-08-21 12:56:51,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:51,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:51,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:51,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59225727] [2021-08-21 12:56:51,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59225727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:51,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747118692] [2021-08-21 12:56:51,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:56:51,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:51,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:51,716 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 12:56:51,716 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 12:56:57,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:56:57,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:57,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-21 12:56:57,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:58,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747118692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:58,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:58,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 29] total 48 [2021-08-21 12:56:58,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845846650] [2021-08-21 12:56:58,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-21 12:56:58,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:58,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-21 12:56:58,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2133, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:56:58,291 INFO L87 Difference]: Start difference. First operand 8571 states and 20882 transitions. Second operand has 49 states, 49 states have (on average 2.4693877551020407) internal successors, (121), 48 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:06,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:06,826 INFO L93 Difference]: Finished difference Result 16503 states and 37523 transitions. [2021-08-21 12:57:06,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-08-21 12:57:06,826 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.4693877551020407) internal successors, (121), 48 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-08-21 12:57:06,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:06,849 INFO L225 Difference]: With dead ends: 16503 [2021-08-21 12:57:06,849 INFO L226 Difference]: Without dead ends: 16470 [2021-08-21 12:57:06,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12346 ImplicationChecksByTransitivity, 4682.1ms TimeCoverageRelationStatistics Valid=2696, Invalid=33976, Unknown=0, NotChecked=0, Total=36672 [2021-08-21 12:57:06,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16470 states. [2021-08-21 12:57:07,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16470 to 9182. [2021-08-21 12:57:07,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9182 states, 9181 states have (on average 2.437207275895872) internal successors, (22376), 9181 states have internal predecessors, (22376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:07,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9182 states to 9182 states and 22376 transitions. [2021-08-21 12:57:07,023 INFO L78 Accepts]: Start accepts. Automaton has 9182 states and 22376 transitions. Word has length 63 [2021-08-21 12:57:07,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:07,023 INFO L470 AbstractCegarLoop]: Abstraction has 9182 states and 22376 transitions. [2021-08-21 12:57:07,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.4693877551020407) internal successors, (121), 48 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:07,023 INFO L276 IsEmpty]: Start isEmpty. Operand 9182 states and 22376 transitions. [2021-08-21 12:57:07,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-21 12:57:07,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:07,031 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:07,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-21 12:57:07,244 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 12:57:07,244 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:57:07,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:07,244 INFO L82 PathProgramCache]: Analyzing trace with hash -2081800327, now seen corresponding path program 105 times [2021-08-21 12:57:07,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:07,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683669421] [2021-08-21 12:57:07,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:07,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:07,605 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:07,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:07,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683669421] [2021-08-21 12:57:07,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683669421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:07,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13648699] [2021-08-21 12:57:07,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:57:07,606 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:07,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:07,606 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 12:57:07,607 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 12:57:13,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-08-21 12:57:13,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:13,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 72 conjunts are in the unsatisfiable core [2021-08-21 12:57:13,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:14,434 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:14,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13648699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:14,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:14,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 30] total 47 [2021-08-21 12:57:14,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959679151] [2021-08-21 12:57:14,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-21 12:57:14,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:14,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-21 12:57:14,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2037, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 12:57:14,435 INFO L87 Difference]: Start difference. First operand 9182 states and 22376 transitions. Second operand has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:21,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:21,185 INFO L93 Difference]: Finished difference Result 12146 states and 28376 transitions. [2021-08-21 12:57:21,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-08-21 12:57:21,185 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-08-21 12:57:21,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:21,201 INFO L225 Difference]: With dead ends: 12146 [2021-08-21 12:57:21,201 INFO L226 Difference]: Without dead ends: 12142 [2021-08-21 12:57:21,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7543 ImplicationChecksByTransitivity, 3920.5ms TimeCoverageRelationStatistics Valid=1895, Invalid=22597, Unknown=0, NotChecked=0, Total=24492 [2021-08-21 12:57:21,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12142 states. [2021-08-21 12:57:21,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12142 to 8786. [2021-08-21 12:57:21,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8786 states, 8785 states have (on average 2.4334661354581675) internal successors, (21378), 8785 states have internal predecessors, (21378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:21,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8786 states to 8786 states and 21378 transitions. [2021-08-21 12:57:21,326 INFO L78 Accepts]: Start accepts. Automaton has 8786 states and 21378 transitions. Word has length 63 [2021-08-21 12:57:21,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:21,326 INFO L470 AbstractCegarLoop]: Abstraction has 8786 states and 21378 transitions. [2021-08-21 12:57:21,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:21,326 INFO L276 IsEmpty]: Start isEmpty. Operand 8786 states and 21378 transitions. [2021-08-21 12:57:21,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-21 12:57:21,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:21,333 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:21,366 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 12:57:21,534 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 12:57:21,534 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:57:21,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:21,534 INFO L82 PathProgramCache]: Analyzing trace with hash 2077265363, now seen corresponding path program 106 times [2021-08-21 12:57:21,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:21,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286655849] [2021-08-21 12:57:21,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:21,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 2 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:22,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:22,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286655849] [2021-08-21 12:57:22,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286655849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:22,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755646810] [2021-08-21 12:57:22,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:57:22,016 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:22,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:22,020 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 12:57:22,020 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 12:57:27,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:57:27,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:27,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-21 12:57:27,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 2 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:28,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755646810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:28,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:28,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 29] total 49 [2021-08-21 12:57:28,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689517960] [2021-08-21 12:57:28,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-21 12:57:28,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:28,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-21 12:57:28,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2215, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 12:57:28,817 INFO L87 Difference]: Start difference. First operand 8786 states and 21378 transitions. Second operand has 50 states, 50 states have (on average 2.42) internal successors, (121), 49 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:38,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:38,407 INFO L93 Difference]: Finished difference Result 18691 states and 42180 transitions. [2021-08-21 12:57:38,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-08-21 12:57:38,407 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.42) internal successors, (121), 49 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-08-21 12:57:38,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:38,433 INFO L225 Difference]: With dead ends: 18691 [2021-08-21 12:57:38,433 INFO L226 Difference]: Without dead ends: 18643 [2021-08-21 12:57:38,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21465 ImplicationChecksByTransitivity, 6405.2ms TimeCoverageRelationStatistics Valid=4907, Invalid=53899, Unknown=0, NotChecked=0, Total=58806 [2021-08-21 12:57:38,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18643 states. [2021-08-21 12:57:38,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18643 to 9246. [2021-08-21 12:57:38,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9246 states, 9245 states have (on average 2.4326663061114115) internal successors, (22490), 9245 states have internal predecessors, (22490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:38,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9246 states to 9246 states and 22490 transitions. [2021-08-21 12:57:38,588 INFO L78 Accepts]: Start accepts. Automaton has 9246 states and 22490 transitions. Word has length 63 [2021-08-21 12:57:38,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:38,588 INFO L470 AbstractCegarLoop]: Abstraction has 9246 states and 22490 transitions. [2021-08-21 12:57:38,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.42) internal successors, (121), 49 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:38,588 INFO L276 IsEmpty]: Start isEmpty. Operand 9246 states and 22490 transitions. [2021-08-21 12:57:38,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-21 12:57:38,596 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:38,596 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:38,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-21 12:57:38,796 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 12:57:38,797 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:57:38,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:38,797 INFO L82 PathProgramCache]: Analyzing trace with hash 196528471, now seen corresponding path program 107 times [2021-08-21 12:57:38,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:38,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321437357] [2021-08-21 12:57:38,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:38,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 6 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:39,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:39,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321437357] [2021-08-21 12:57:39,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321437357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:39,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366693080] [2021-08-21 12:57:39,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:57:39,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:39,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:39,183 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 12:57:39,183 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 12:57:44,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-08-21 12:57:44,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:44,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-21 12:57:44,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 6 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:46,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366693080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:46,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:46,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 30] total 51 [2021-08-21 12:57:46,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179447220] [2021-08-21 12:57:46,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-21 12:57:46,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:46,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-21 12:57:46,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=2388, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 12:57:46,102 INFO L87 Difference]: Start difference. First operand 9246 states and 22490 transitions. Second operand has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:57,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:57,719 INFO L93 Difference]: Finished difference Result 21396 states and 47967 transitions. [2021-08-21 12:57:57,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2021-08-21 12:57:57,720 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-08-21 12:57:57,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:57,747 INFO L225 Difference]: With dead ends: 21396 [2021-08-21 12:57:57,747 INFO L226 Difference]: Without dead ends: 21318 [2021-08-21 12:57:57,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29272 ImplicationChecksByTransitivity, 7272.6ms TimeCoverageRelationStatistics Valid=7203, Invalid=69249, Unknown=0, NotChecked=0, Total=76452 [2021-08-21 12:57:57,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21318 states. [2021-08-21 12:57:57,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21318 to 8896. [2021-08-21 12:57:57,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8896 states, 8895 states have (on average 2.4377740303541313) internal successors, (21684), 8895 states have internal predecessors, (21684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:57,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8896 states to 8896 states and 21684 transitions. [2021-08-21 12:57:57,911 INFO L78 Accepts]: Start accepts. Automaton has 8896 states and 21684 transitions. Word has length 63 [2021-08-21 12:57:57,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:57,911 INFO L470 AbstractCegarLoop]: Abstraction has 8896 states and 21684 transitions. [2021-08-21 12:57:57,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:57,911 INFO L276 IsEmpty]: Start isEmpty. Operand 8896 states and 21684 transitions. [2021-08-21 12:57:57,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-21 12:57:57,919 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:57,919 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:57,952 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 12:57:58,120 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 12:57:58,120 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:57:58,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:58,120 INFO L82 PathProgramCache]: Analyzing trace with hash -779144741, now seen corresponding path program 108 times [2021-08-21 12:57:58,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:58,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889077928] [2021-08-21 12:57:58,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:58,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:58,520 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 12 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:58,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:58,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889077928] [2021-08-21 12:57:58,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889077928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:58,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897454987] [2021-08-21 12:57:58,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:57:58,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:58,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:58,521 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 12:57:58,522 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 12:58:04,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-08-21 12:58:04,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:04,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-21 12:58:04,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 12 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:05,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897454987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:05,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:05,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 29] total 51 [2021-08-21 12:58:05,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437749001] [2021-08-21 12:58:05,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-21 12:58:05,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:05,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-21 12:58:05,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2379, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 12:58:05,489 INFO L87 Difference]: Start difference. First operand 8896 states and 21684 transitions. Second operand has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:16,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:16,262 INFO L93 Difference]: Finished difference Result 24131 states and 53884 transitions. [2021-08-21 12:58:16,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2021-08-21 12:58:16,262 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-08-21 12:58:16,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:16,296 INFO L225 Difference]: With dead ends: 24131 [2021-08-21 12:58:16,296 INFO L226 Difference]: Without dead ends: 24017 [2021-08-21 12:58:16,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30983 ImplicationChecksByTransitivity, 6887.5ms TimeCoverageRelationStatistics Valid=8486, Invalid=71886, Unknown=0, NotChecked=0, Total=80372 [2021-08-21 12:58:16,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24017 states. [2021-08-21 12:58:16,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24017 to 8822. [2021-08-21 12:58:16,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8822 states, 8821 states have (on average 2.4384990363904318) internal successors, (21510), 8821 states have internal predecessors, (21510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:16,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8822 states to 8822 states and 21510 transitions. [2021-08-21 12:58:16,513 INFO L78 Accepts]: Start accepts. Automaton has 8822 states and 21510 transitions. Word has length 63 [2021-08-21 12:58:16,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:16,513 INFO L470 AbstractCegarLoop]: Abstraction has 8822 states and 21510 transitions. [2021-08-21 12:58:16,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:16,513 INFO L276 IsEmpty]: Start isEmpty. Operand 8822 states and 21510 transitions. [2021-08-21 12:58:16,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-21 12:58:16,520 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:16,520 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:16,552 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 12:58:16,721 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 12:58:16,721 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:58:16,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:16,721 INFO L82 PathProgramCache]: Analyzing trace with hash 2077460319, now seen corresponding path program 109 times [2021-08-21 12:58:16,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:16,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59554909] [2021-08-21 12:58:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:16,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 20 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:17,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:17,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59554909] [2021-08-21 12:58:17,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59554909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:17,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009829761] [2021-08-21 12:58:17,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:58:17,096 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:17,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:17,097 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 12:58:17,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 12:58:17,871 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 12:58:17,898 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 12:58:18,901 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 12:58:18,923 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 12:58:18,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-21 12:58:19,101 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 12:58:19,102 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 64 with TraceHistMax 12,while executing Executor. [2021-08-21 12:58:19,103 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 12:58:19,103 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 12:58:19,106 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 12:58:19,106 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 12:58:19,107 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 12:58:19 BasicIcfg [2021-08-21 12:58:19,107 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 12:58:19,108 INFO L168 Benchmark]: Toolchain (without parser) took 748567.37 ms. Allocated memory was 204.5 MB in the beginning and 2.2 GB in the end (delta: 2.0 GB). Free memory was 185.2 MB in the beginning and 698.8 MB in the end (delta: -513.6 MB). Peak memory consumption was 1.5 GB. Max. memory is 8.0 GB. [2021-08-21 12:58:19,108 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 204.5 MB. Free memory is still 186.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 12:58:19,109 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.90 ms. Allocated memory is still 204.5 MB. Free memory was 185.2 MB in the beginning and 183.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:58:19,109 INFO L168 Benchmark]: Boogie Preprocessor took 14.15 ms. Allocated memory is still 204.5 MB. Free memory was 183.8 MB in the beginning and 182.8 MB in the end (delta: 949.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:58:19,109 INFO L168 Benchmark]: RCFGBuilder took 197.74 ms. Allocated memory is still 204.5 MB. Free memory was 182.7 MB in the beginning and 171.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-08-21 12:58:19,109 INFO L168 Benchmark]: TraceAbstraction took 748331.99 ms. Allocated memory was 204.5 MB in the beginning and 2.2 GB in the end (delta: 2.0 GB). Free memory was 170.7 MB in the beginning and 698.8 MB in the end (delta: -528.1 MB). Peak memory consumption was 1.5 GB. Max. memory is 8.0 GB. [2021-08-21 12:58:19,110 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 0.10 ms. Allocated memory is still 204.5 MB. Free memory is still 186.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 18.90 ms. Allocated memory is still 204.5 MB. Free memory was 185.2 MB in the beginning and 183.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.15 ms. Allocated memory is still 204.5 MB. Free memory was 183.8 MB in the beginning and 182.8 MB in the end (delta: 949.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 197.74 ms. Allocated memory is still 204.5 MB. Free memory was 182.7 MB in the beginning and 171.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 748331.99 ms. Allocated memory was 204.5 MB in the beginning and 2.2 GB in the end (delta: 2.0 GB). Free memory was 170.7 MB in the beginning and 698.8 MB in the end (delta: -528.1 MB). Peak memory consumption was 1.5 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: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 64 with TraceHistMax 12,while executing Executor. - TimeoutResultAtElement [Line: 45]: 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 64 with TraceHistMax 12,while executing Executor. - TimeoutResultAtElement [Line: 45]: 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 64 with TraceHistMax 12,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 748250.3ms, OverallIterations: 111, TraceHistogramMax: 12, EmptinessCheckTime: 327.8ms, AutomataDifference: 364725.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6007 SDtfs, 46832 SDslu, 89300 SDs, 0 SdLazy, 258980 SolverSat, 14313 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 90539.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16883 GetRequests, 3421 SyntacticMatches, 32 SemanticMatches, 13430 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895221 ImplicationChecksByTransitivity, 283693.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9246occurred in iteration=108, InterpolantAutomatonStates: 10598, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5790.2ms AutomataMinimizationTime, 110 MinimizatonAttempts, 437388 StatesRemovedByMinimization, 110 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 400.3ms SsaConstructionTime, 2467.1ms SatisfiabilityAnalysisTime, 102326.7ms InterpolantComputationTime, 9712 NumberOfCodeBlocks, 9712 NumberOfCodeBlocksAsserted, 728 NumberOfCheckSat, 9494 ConstructedInterpolants, 0 QuantifiedInterpolants, 85025 SizeOfPredicates, 400 NumberOfNonLiveVariables, 11182 ConjunctsInSsa, 4032 ConjunctsInUnsatCore, 218 InterpolantComputations, 2 PerfectInterpolantSequences, 4933/28001 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