/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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 20:44:03,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 20:44:03,702 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 20:44:03,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-06 20:44:03,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-06 20:44:03,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-06 20:44:03,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-06 20:44:03,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-06 20:44:03,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-06 20:44:03,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-06 20:44:03,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-06 20:44:03,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-08-06 20:44:03,798 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-Delay.epf [2021-08-06 20:44:03,832 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 20:44:03,833 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 20:44:03,836 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 20:44:03,836 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 20:44:03,836 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 20:44:03,836 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 20:44:03,837 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 20:44:03,837 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 20:44:03,837 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 20:44:03,837 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 20:44:03,838 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 20:44:03,838 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 20:44:03,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 20:44:03,850 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 20:44:03,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 20:44:03,850 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 20:44:03,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 20:44:03,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 20:44:03,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 20:44:03,851 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 20:44:03,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 20:44:03,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:44:03,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 20:44:03,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 20:44:03,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 20:44:03,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 20:44:03,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 20:44:03,853 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 20:44:03,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 20:44:03,853 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 20:44:03,853 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 20:44:04,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 20:44:04,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 20:44:04,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 20:44:04,179 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 20:44:04,180 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 20:44:04,181 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun.wvr.bpl [2021-08-06 20:44:04,181 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun.wvr.bpl' [2021-08-06 20:44:04,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 20:44:04,230 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 20:44:04,230 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 20:44:04,230 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 20:44:04,231 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 20:44:04,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:44:04" (1/1) ... [2021-08-06 20:44:04,249 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:44:04" (1/1) ... [2021-08-06 20:44:04,256 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 20:44:04,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 20:44:04,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 20:44:04,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 20:44:04,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:44:04" (1/1) ... [2021-08-06 20:44:04,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:44:04" (1/1) ... [2021-08-06 20:44:04,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:44:04" (1/1) ... [2021-08-06 20:44:04,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:44:04" (1/1) ... [2021-08-06 20:44:04,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:44:04" (1/1) ... [2021-08-06 20:44:04,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:44:04" (1/1) ... [2021-08-06 20:44:04,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:44:04" (1/1) ... [2021-08-06 20:44:04,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 20:44:04,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 20:44:04,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 20:44:04,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 20:44:04,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:44:04" (1/1) ... [2021-08-06 20:44:04,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:44:04,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:04,306 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) [2021-08-06 20:44:04,325 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 [2021-08-06 20:44:04,354 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 20:44:04,355 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 20:44:04,355 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 20:44:04,355 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 20:44:04,355 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 20:44:04,355 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 20:44:04,355 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 20:44:04,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 20:44:04,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 20:44:04,356 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 20:44:04,356 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 20:44:04,356 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 20:44:04,357 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 20:44:04,536 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 20:44:04,536 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 20:44:04,538 INFO L202 PluginConnector]: Adding new model sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:44:04 BoogieIcfgContainer [2021-08-06 20:44:04,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 20:44:04,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 20:44:04,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 20:44:04,542 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 20:44:04,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:44:04" (1/2) ... [2021-08-06 20:44:04,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21680fea and model type sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 08:44:04, skipping insertion in model container [2021-08-06 20:44:04,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:44:04" (2/2) ... [2021-08-06 20:44:04,544 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-fun.wvr.bpl [2021-08-06 20:44:04,549 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 20:44:04,549 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 20:44:04,549 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 20:44:04,550 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 20:44:04,583 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 20:44:04,620 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 20:44:04,626 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 [2021-08-06 20:44:04,626 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 20:44:04,779 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 79 states have (on average 1.7468354430379747) internal successors, (138), 111 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:04,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 20:44:04,791 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:04,792 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:04,793 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:04,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:04,801 INFO L82 PathProgramCache]: Analyzing trace with hash -234537446, now seen corresponding path program 1 times [2021-08-06 20:44:04,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:04,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135031316] [2021-08-06 20:44:04,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:04,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:05,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:05,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:05,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135031316] [2021-08-06 20:44:05,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135031316] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:44:05,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:44:05,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 20:44:05,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191390830] [2021-08-06 20:44:05,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:44:05,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:05,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:44:05,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:44:05,068 INFO L87 Difference]: Start difference. First operand has 112 states, 79 states have (on average 1.7468354430379747) internal successors, (138), 111 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:05,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:05,143 INFO L93 Difference]: Finished difference Result 154 states and 194 transitions. [2021-08-06 20:44:05,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:44:05,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 20:44:05,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:05,154 INFO L225 Difference]: With dead ends: 154 [2021-08-06 20:44:05,154 INFO L226 Difference]: Without dead ends: 52 [2021-08-06 20:44:05,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:44:05,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-06 20:44:05,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2021-08-06 20:44:05,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 44 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) [2021-08-06 20:44:05,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 69 transitions. [2021-08-06 20:44:05,195 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 69 transitions. Word has length 18 [2021-08-06 20:44:05,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:05,196 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 69 transitions. [2021-08-06 20:44:05,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:05,196 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 69 transitions. [2021-08-06 20:44:05,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 20:44:05,198 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:05,198 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:05,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 20:44:05,199 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:05,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:05,202 INFO L82 PathProgramCache]: Analyzing trace with hash -518877060, now seen corresponding path program 1 times [2021-08-06 20:44:05,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:05,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102146346] [2021-08-06 20:44:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:05,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:44:05,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:05,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102146346] [2021-08-06 20:44:05,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102146346] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:44:05,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:44:05,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 20:44:05,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684822648] [2021-08-06 20:44:05,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 20:44:05,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:05,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 20:44:05,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 20:44:05,293 INFO L87 Difference]: Start difference. First operand 45 states and 69 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:05,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:05,334 INFO L93 Difference]: Finished difference Result 57 states and 98 transitions. [2021-08-06 20:44:05,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 20:44:05,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 20:44:05,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:05,336 INFO L225 Difference]: With dead ends: 57 [2021-08-06 20:44:05,336 INFO L226 Difference]: Without dead ends: 57 [2021-08-06 20:44:05,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:44:05,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-06 20:44:05,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-08-06 20:44:05,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.75) internal successors, (98), 56 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) [2021-08-06 20:44:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 98 transitions. [2021-08-06 20:44:05,351 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 98 transitions. Word has length 20 [2021-08-06 20:44:05,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:05,352 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 98 transitions. [2021-08-06 20:44:05,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:05,352 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 98 transitions. [2021-08-06 20:44:05,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:44:05,354 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:05,354 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:05,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 20:44:05,355 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:05,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:05,356 INFO L82 PathProgramCache]: Analyzing trace with hash 12486490, now seen corresponding path program 1 times [2021-08-06 20:44:05,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:05,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282670926] [2021-08-06 20:44:05,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:05,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:05,625 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 78.8 percent of original size [2021-08-06 20:44:05,656 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 78.8 percent of original size [2021-08-06 20:44:05,723 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 84.1 percent of original size [2021-08-06 20:44:05,733 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 84.1 percent of original size [2021-08-06 20:44:05,787 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 81.6 percent of original size [2021-08-06 20:44:05,794 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 81.6 percent of original size [2021-08-06 20:44:05,837 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 72.7 percent of original size [2021-08-06 20:44:05,843 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 72.7 percent of original size [2021-08-06 20:44:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:05,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:05,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282670926] [2021-08-06 20:44:05,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282670926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:05,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301392605] [2021-08-06 20:44:05,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:05,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:05,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:05,882 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) [2021-08-06 20:44:05,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 20:44:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:05,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 20:44:05,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:06,485 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 20:44:06,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2021-08-06 20:44:06,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:06,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301392605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:06,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:06,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 20:44:06,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459457385] [2021-08-06 20:44:06,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:44:06,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:06,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:44:06,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:44:06,650 INFO L87 Difference]: Start difference. First operand 57 states and 98 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-06 20:44:06,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:06,881 INFO L93 Difference]: Finished difference Result 121 states and 202 transitions. [2021-08-06 20:44:06,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:44:06,881 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 22 [2021-08-06 20:44:06,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:06,883 INFO L225 Difference]: With dead ends: 121 [2021-08-06 20:44:06,883 INFO L226 Difference]: Without dead ends: 116 [2021-08-06 20:44:06,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 281.3ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:44:06,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-06 20:44:06,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2021-08-06 20:44:06,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.864864864864865) internal successors, (138), 74 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:06,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 138 transitions. [2021-08-06 20:44:06,890 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 138 transitions. Word has length 22 [2021-08-06 20:44:06,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:06,890 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 138 transitions. [2021-08-06 20:44:06,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-06 20:44:06,890 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 138 transitions. [2021-08-06 20:44:06,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:44:06,891 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:06,891 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:06,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:07,114 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 [2021-08-06 20:44:07,115 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:07,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:07,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1559898278, now seen corresponding path program 2 times [2021-08-06 20:44:07,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:07,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701625346] [2021-08-06 20:44:07,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:07,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:07,248 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 78.8 percent of original size [2021-08-06 20:44:07,257 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 78.8 percent of original size [2021-08-06 20:44:07,312 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 84.1 percent of original size [2021-08-06 20:44:07,317 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 84.1 percent of original size [2021-08-06 20:44:07,358 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 76.9 percent of original size [2021-08-06 20:44:07,362 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 76.9 percent of original size [2021-08-06 20:44:07,395 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 72.7 percent of original size [2021-08-06 20:44:07,398 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 72.7 percent of original size [2021-08-06 20:44:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:07,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:07,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701625346] [2021-08-06 20:44:07,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701625346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:07,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438407673] [2021-08-06 20:44:07,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:44:07,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:07,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:07,429 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) [2021-08-06 20:44:07,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 20:44:07,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:44:07,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:07,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 20:44:07,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:07,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:44:07,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-08-06 20:44:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:08,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438407673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:08,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:08,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-06 20:44:08,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052545207] [2021-08-06 20:44:08,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:44:08,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:08,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:44:08,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:44:08,162 INFO L87 Difference]: Start difference. First operand 75 states and 138 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:08,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:08,686 INFO L93 Difference]: Finished difference Result 159 states and 270 transitions. [2021-08-06 20:44:08,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:44:08,687 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 20:44:08,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:08,688 INFO L225 Difference]: With dead ends: 159 [2021-08-06 20:44:08,688 INFO L226 Difference]: Without dead ends: 154 [2021-08-06 20:44:08,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 492.1ms TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:44:08,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-06 20:44:08,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 77. [2021-08-06 20:44:08,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.881578947368421) internal successors, (143), 76 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:08,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 143 transitions. [2021-08-06 20:44:08,695 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 143 transitions. Word has length 22 [2021-08-06 20:44:08,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:08,695 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 143 transitions. [2021-08-06 20:44:08,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:08,695 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 143 transitions. [2021-08-06 20:44:08,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:44:08,696 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:08,696 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:08,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:08,916 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 [2021-08-06 20:44:08,917 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:08,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:08,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1733588454, now seen corresponding path program 3 times [2021-08-06 20:44:08,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:08,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57853530] [2021-08-06 20:44:08,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:08,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:09,007 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 78.8 percent of original size [2021-08-06 20:44:09,014 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 78.8 percent of original size [2021-08-06 20:44:09,101 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 76.3 percent of original size [2021-08-06 20:44:09,105 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 76.3 percent of original size [2021-08-06 20:44:09,135 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 71.9 percent of original size [2021-08-06 20:44:09,139 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 71.9 percent of original size [2021-08-06 20:44:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:09,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:09,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57853530] [2021-08-06 20:44:09,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57853530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:09,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103973663] [2021-08-06 20:44:09,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:44:09,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:09,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:09,173 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) [2021-08-06 20:44:09,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 20:44:09,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 20:44:09,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:09,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 20:44:09,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:09,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:44:09,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-08-06 20:44:09,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:09,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103973663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:09,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:09,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-06 20:44:09,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945519067] [2021-08-06 20:44:09,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:44:09,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:09,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:44:09,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:44:09,877 INFO L87 Difference]: Start difference. First operand 77 states and 143 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:10,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:10,215 INFO L93 Difference]: Finished difference Result 134 states and 237 transitions. [2021-08-06 20:44:10,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:44:10,215 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 20:44:10,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:10,217 INFO L225 Difference]: With dead ends: 134 [2021-08-06 20:44:10,217 INFO L226 Difference]: Without dead ends: 129 [2021-08-06 20:44:10,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 350.1ms TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:44:10,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-08-06 20:44:10,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2021-08-06 20:44:10,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.8875) internal successors, (151), 80 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:10,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 151 transitions. [2021-08-06 20:44:10,234 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 151 transitions. Word has length 22 [2021-08-06 20:44:10,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:10,234 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 151 transitions. [2021-08-06 20:44:10,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:10,234 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 151 transitions. [2021-08-06 20:44:10,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:44:10,235 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:10,235 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:10,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:10,444 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 [2021-08-06 20:44:10,445 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:10,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:10,445 INFO L82 PathProgramCache]: Analyzing trace with hash 708303036, now seen corresponding path program 4 times [2021-08-06 20:44:10,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:10,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711428597] [2021-08-06 20:44:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:10,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:10,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:10,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711428597] [2021-08-06 20:44:10,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711428597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:10,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022265982] [2021-08-06 20:44:10,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:44:10,531 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:10,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:10,531 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) [2021-08-06 20:44:10,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 20:44:10,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:44:10,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:10,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:44:10,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:10,896 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:10,897 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:10,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022265982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:10,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:10,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 20:44:10,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306007063] [2021-08-06 20:44:10,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:44:10,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:10,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:44:10,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:44:10,922 INFO L87 Difference]: Start difference. First operand 81 states and 151 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:11,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:11,100 INFO L93 Difference]: Finished difference Result 192 states and 333 transitions. [2021-08-06 20:44:11,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:44:11,100 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:44:11,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:11,101 INFO L225 Difference]: With dead ends: 192 [2021-08-06 20:44:11,101 INFO L226 Difference]: Without dead ends: 192 [2021-08-06 20:44:11,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 137.9ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:44:11,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-06 20:44:11,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 97. [2021-08-06 20:44:11,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:11,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-08-06 20:44:11,107 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 24 [2021-08-06 20:44:11,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:11,108 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-08-06 20:44:11,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:11,108 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-08-06 20:44:11,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:44:11,109 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:11,109 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:11,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-06 20:44:11,325 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 [2021-08-06 20:44:11,325 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:11,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:11,325 INFO L82 PathProgramCache]: Analyzing trace with hash -783191876, now seen corresponding path program 5 times [2021-08-06 20:44:11,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:11,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708402418] [2021-08-06 20:44:11,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:11,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:11,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:11,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708402418] [2021-08-06 20:44:11,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708402418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:11,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87845849] [2021-08-06 20:44:11,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:44:11,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:11,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:11,389 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) [2021-08-06 20:44:11,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 20:44:11,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:44:11,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:11,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:44:11,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:11,802 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:11,803 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:11,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:11,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87845849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:11,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:11,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 20:44:11,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874627142] [2021-08-06 20:44:11,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:44:11,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:11,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:44:11,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:44:11,829 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:12,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:12,174 INFO L93 Difference]: Finished difference Result 254 states and 436 transitions. [2021-08-06 20:44:12,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:44:12,174 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:44:12,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:12,176 INFO L225 Difference]: With dead ends: 254 [2021-08-06 20:44:12,176 INFO L226 Difference]: Without dead ends: 254 [2021-08-06 20:44:12,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:44:12,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-08-06 20:44:12,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 99. [2021-08-06 20:44:12,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.010204081632653) internal successors, (197), 98 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 197 transitions. [2021-08-06 20:44:12,182 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 197 transitions. Word has length 24 [2021-08-06 20:44:12,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:12,182 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 197 transitions. [2021-08-06 20:44:12,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:12,182 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 197 transitions. [2021-08-06 20:44:12,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:44:12,183 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:12,183 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:12,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:12,396 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 [2021-08-06 20:44:12,397 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:12,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:12,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1401497400, now seen corresponding path program 1 times [2021-08-06 20:44:12,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:12,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898456257] [2021-08-06 20:44:12,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:12,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:12,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:44:12,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:12,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898456257] [2021-08-06 20:44:12,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898456257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:12,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578595032] [2021-08-06 20:44:12,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:12,441 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:12,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:12,457 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) [2021-08-06 20:44:12,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 20:44:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:12,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:44:12,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:12,781 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:44:12,782 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:44:12,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:44:12,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578595032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:12,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:12,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 20:44:12,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534718182] [2021-08-06 20:44:12,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:44:12,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:12,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:44:12,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:44:12,841 INFO L87 Difference]: Start difference. First operand 99 states and 197 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:12,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:12,953 INFO L93 Difference]: Finished difference Result 206 states and 383 transitions. [2021-08-06 20:44:12,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:44:12,953 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:44:12,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:12,954 INFO L225 Difference]: With dead ends: 206 [2021-08-06 20:44:12,954 INFO L226 Difference]: Without dead ends: 206 [2021-08-06 20:44:12,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:44:12,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-06 20:44:12,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2021-08-06 20:44:12,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 146 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:12,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 301 transitions. [2021-08-06 20:44:12,960 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 301 transitions. Word has length 24 [2021-08-06 20:44:12,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:12,960 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 301 transitions. [2021-08-06 20:44:12,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:12,960 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 301 transitions. [2021-08-06 20:44:12,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:44:12,961 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:12,961 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:12,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:13,181 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 [2021-08-06 20:44:13,182 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:13,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:13,182 INFO L82 PathProgramCache]: Analyzing trace with hash -448250184, now seen corresponding path program 6 times [2021-08-06 20:44:13,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:13,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539415910] [2021-08-06 20:44:13,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:13,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:13,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:13,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539415910] [2021-08-06 20:44:13,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539415910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:13,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908476008] [2021-08-06 20:44:13,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:44:13,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:13,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:13,247 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) [2021-08-06 20:44:13,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 20:44:13,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:44:13,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:13,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:44:13,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:13,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:13,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908476008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:13,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:13,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 20:44:13,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091305987] [2021-08-06 20:44:13,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:44:13,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:13,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:44:13,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:44:13,673 INFO L87 Difference]: Start difference. First operand 147 states and 301 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:13,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:13,808 INFO L93 Difference]: Finished difference Result 230 states and 441 transitions. [2021-08-06 20:44:13,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:44:13,808 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:44:13,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:13,810 INFO L225 Difference]: With dead ends: 230 [2021-08-06 20:44:13,810 INFO L226 Difference]: Without dead ends: 218 [2021-08-06 20:44:13,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:44:13,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-08-06 20:44:13,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 183. [2021-08-06 20:44:13,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.043956043956044) internal successors, (372), 182 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:13,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 372 transitions. [2021-08-06 20:44:13,816 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 372 transitions. Word has length 24 [2021-08-06 20:44:13,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:13,816 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 372 transitions. [2021-08-06 20:44:13,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:13,816 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 372 transitions. [2021-08-06 20:44:13,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:44:13,817 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:13,817 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:13,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:14,039 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 [2021-08-06 20:44:14,039 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:14,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:14,039 INFO L82 PathProgramCache]: Analyzing trace with hash 605470520, now seen corresponding path program 2 times [2021-08-06 20:44:14,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:14,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108845413] [2021-08-06 20:44:14,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:14,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:44:14,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:14,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108845413] [2021-08-06 20:44:14,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108845413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:14,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711859685] [2021-08-06 20:44:14,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:44:14,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:14,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:14,092 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) [2021-08-06 20:44:14,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 20:44:14,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:44:14,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:14,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:44:14,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:14,418 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:14,418 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:44:14,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711859685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:14,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:14,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 20:44:14,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112987077] [2021-08-06 20:44:14,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:44:14,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:14,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:44:14,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:44:14,477 INFO L87 Difference]: Start difference. First operand 183 states and 372 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:14,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:14,580 INFO L93 Difference]: Finished difference Result 221 states and 420 transitions. [2021-08-06 20:44:14,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:44:14,580 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:44:14,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:14,582 INFO L225 Difference]: With dead ends: 221 [2021-08-06 20:44:14,599 INFO L226 Difference]: Without dead ends: 221 [2021-08-06 20:44:14,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:44:14,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-08-06 20:44:14,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 171. [2021-08-06 20:44:14,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.0058823529411764) internal successors, (341), 170 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:14,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 341 transitions. [2021-08-06 20:44:14,606 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 341 transitions. Word has length 24 [2021-08-06 20:44:14,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:14,607 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 341 transitions. [2021-08-06 20:44:14,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:14,607 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 341 transitions. [2021-08-06 20:44:14,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:44:14,608 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:14,608 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:14,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:14,832 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 [2021-08-06 20:44:14,832 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:14,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:14,832 INFO L82 PathProgramCache]: Analyzing trace with hash 60653496, now seen corresponding path program 7 times [2021-08-06 20:44:14,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:14,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508485849] [2021-08-06 20:44:14,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:14,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:14,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:14,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:14,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508485849] [2021-08-06 20:44:14,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508485849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:14,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783083116] [2021-08-06 20:44:14,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:44:14,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:14,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:14,899 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) [2021-08-06 20:44:14,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 20:44:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:15,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:44:15,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:15,359 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:15,360 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:15,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783083116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:15,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:15,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 20:44:15,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352425098] [2021-08-06 20:44:15,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:44:15,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:15,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:44:15,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:44:15,384 INFO L87 Difference]: Start difference. First operand 171 states and 341 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:16,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:16,020 INFO L93 Difference]: Finished difference Result 577 states and 984 transitions. [2021-08-06 20:44:16,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 20:44:16,021 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:44:16,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:16,023 INFO L225 Difference]: With dead ends: 577 [2021-08-06 20:44:16,023 INFO L226 Difference]: Without dead ends: 577 [2021-08-06 20:44:16,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 454.9ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:44:16,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-08-06 20:44:16,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 183. [2021-08-06 20:44:16,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.0549450549450547) internal successors, (374), 182 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) [2021-08-06 20:44:16,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 374 transitions. [2021-08-06 20:44:16,033 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 374 transitions. Word has length 24 [2021-08-06 20:44:16,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:16,033 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 374 transitions. [2021-08-06 20:44:16,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:16,033 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 374 transitions. [2021-08-06 20:44:16,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:44:16,034 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:16,034 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:16,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-08-06 20:44:16,252 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 [2021-08-06 20:44:16,253 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:16,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:16,253 INFO L82 PathProgramCache]: Analyzing trace with hash 318475960, now seen corresponding path program 8 times [2021-08-06 20:44:16,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:16,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503034093] [2021-08-06 20:44:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:16,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:16,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:16,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503034093] [2021-08-06 20:44:16,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503034093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:16,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635753101] [2021-08-06 20:44:16,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:44:16,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:16,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:16,333 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) [2021-08-06 20:44:16,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 20:44:16,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:44:16,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:16,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:44:16,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:16,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635753101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:16,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:16,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 20:44:16,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139593139] [2021-08-06 20:44:16,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:44:16,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:16,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:44:16,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:44:16,776 INFO L87 Difference]: Start difference. First operand 183 states and 374 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:16,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:16,953 INFO L93 Difference]: Finished difference Result 355 states and 658 transitions. [2021-08-06 20:44:16,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:44:16,953 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:44:16,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:16,955 INFO L225 Difference]: With dead ends: 355 [2021-08-06 20:44:16,955 INFO L226 Difference]: Without dead ends: 351 [2021-08-06 20:44:16,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 155.4ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:44:16,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-08-06 20:44:16,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 240. [2021-08-06 20:44:16,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.1171548117154813) internal successors, (506), 239 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:16,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 506 transitions. [2021-08-06 20:44:16,963 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 506 transitions. Word has length 24 [2021-08-06 20:44:16,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:16,963 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 506 transitions. [2021-08-06 20:44:16,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:16,963 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 506 transitions. [2021-08-06 20:44:16,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:44:16,964 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:16,964 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:16,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-08-06 20:44:17,183 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 [2021-08-06 20:44:17,183 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:17,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:17,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1253908808, now seen corresponding path program 9 times [2021-08-06 20:44:17,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:17,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637120101] [2021-08-06 20:44:17,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:17,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:17,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:17,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:17,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637120101] [2021-08-06 20:44:17,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637120101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:17,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445345562] [2021-08-06 20:44:17,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:44:17,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:17,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:17,247 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) [2021-08-06 20:44:17,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 20:44:17,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:44:17,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:17,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:44:17,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:17,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445345562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:17,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:17,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 20:44:17,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704344218] [2021-08-06 20:44:17,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:44:17,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:17,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:44:17,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:44:17,719 INFO L87 Difference]: Start difference. First operand 240 states and 506 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:18,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:18,035 INFO L93 Difference]: Finished difference Result 370 states and 706 transitions. [2021-08-06 20:44:18,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:44:18,036 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:44:18,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:18,038 INFO L225 Difference]: With dead ends: 370 [2021-08-06 20:44:18,038 INFO L226 Difference]: Without dead ends: 370 [2021-08-06 20:44:18,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 227.2ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:44:18,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-08-06 20:44:18,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 253. [2021-08-06 20:44:18,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.0952380952380953) internal successors, (528), 252 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:18,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 528 transitions. [2021-08-06 20:44:18,046 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 528 transitions. Word has length 24 [2021-08-06 20:44:18,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:18,046 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 528 transitions. [2021-08-06 20:44:18,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:18,046 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 528 transitions. [2021-08-06 20:44:18,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:44:18,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:18,047 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:18,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:18,260 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 [2021-08-06 20:44:18,261 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:18,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:18,261 INFO L82 PathProgramCache]: Analyzing trace with hash 351717368, now seen corresponding path program 3 times [2021-08-06 20:44:18,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:18,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330534648] [2021-08-06 20:44:18,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:18,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:44:18,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:18,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330534648] [2021-08-06 20:44:18,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330534648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:18,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251555652] [2021-08-06 20:44:18,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:44:18,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:18,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:18,322 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) [2021-08-06 20:44:18,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 20:44:18,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 20:44:18,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:18,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:44:18,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:18,682 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:18,682 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:18,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:44:18,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251555652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:18,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:18,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-08-06 20:44:18,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919668738] [2021-08-06 20:44:18,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:44:18,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:18,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:44:18,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:44:18,731 INFO L87 Difference]: Start difference. First operand 253 states and 528 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:18,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:18,830 INFO L93 Difference]: Finished difference Result 273 states and 566 transitions. [2021-08-06 20:44:18,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 20:44:18,830 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:44:18,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:18,832 INFO L225 Difference]: With dead ends: 273 [2021-08-06 20:44:18,833 INFO L226 Difference]: Without dead ends: 273 [2021-08-06 20:44:18,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:44:18,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-08-06 20:44:18,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 233. [2021-08-06 20:44:18,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.1293103448275863) internal successors, (494), 232 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:18,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 494 transitions. [2021-08-06 20:44:18,840 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 494 transitions. Word has length 24 [2021-08-06 20:44:18,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:18,840 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 494 transitions. [2021-08-06 20:44:18,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:18,840 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 494 transitions. [2021-08-06 20:44:18,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:44:18,841 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:18,841 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:18,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:19,056 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 [2021-08-06 20:44:19,057 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:19,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:19,057 INFO L82 PathProgramCache]: Analyzing trace with hash 648118904, now seen corresponding path program 10 times [2021-08-06 20:44:19,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:19,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923277627] [2021-08-06 20:44:19,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:19,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:19,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:19,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923277627] [2021-08-06 20:44:19,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923277627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:19,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168948782] [2021-08-06 20:44:19,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:44:19,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:19,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:19,136 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) [2021-08-06 20:44:19,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 20:44:19,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:44:19,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:19,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:44:19,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:19,605 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:19,605 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:44:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:19,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168948782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:19,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:19,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 20:44:19,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226897888] [2021-08-06 20:44:19,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:44:19,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:19,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:44:19,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:44:19,629 INFO L87 Difference]: Start difference. First operand 233 states and 494 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:19,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:19,965 INFO L93 Difference]: Finished difference Result 604 states and 1149 transitions. [2021-08-06 20:44:19,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:44:19,966 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:44:19,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:19,968 INFO L225 Difference]: With dead ends: 604 [2021-08-06 20:44:19,968 INFO L226 Difference]: Without dead ends: 604 [2021-08-06 20:44:19,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 231.9ms TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:44:19,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-08-06 20:44:19,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 283. [2021-08-06 20:44:19,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.1702127659574466) internal successors, (612), 282 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:19,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 612 transitions. [2021-08-06 20:44:19,981 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 612 transitions. Word has length 24 [2021-08-06 20:44:19,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:19,981 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 612 transitions. [2021-08-06 20:44:19,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:19,981 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 612 transitions. [2021-08-06 20:44:19,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:19,982 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:19,982 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:20,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:20,200 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 [2021-08-06 20:44:20,201 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:20,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:20,201 INFO L82 PathProgramCache]: Analyzing trace with hash 66299930, now seen corresponding path program 4 times [2021-08-06 20:44:20,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:20,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223460] [2021-08-06 20:44:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:20,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:20,341 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 68, result has 51.4 percent of original size [2021-08-06 20:44:20,353 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 68, result has 51.4 percent of original size [2021-08-06 20:44:20,413 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 79.2 percent of original size [2021-08-06 20:44:20,416 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 79.2 percent of original size [2021-08-06 20:44:20,467 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 76.6 percent of original size [2021-08-06 20:44:20,470 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 76.6 percent of original size [2021-08-06 20:44:20,504 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 54.9 percent of original size [2021-08-06 20:44:20,507 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 54.9 percent of original size [2021-08-06 20:44:20,553 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:44:20,554 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:44:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:20,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:20,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223460] [2021-08-06 20:44:20,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223460] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:20,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698056177] [2021-08-06 20:44:20,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:44:20,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:20,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:20,573 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) [2021-08-06 20:44:20,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 20:44:20,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:44:20,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:20,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:44:20,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:21,482 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:44:21,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2021-08-06 20:44:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:21,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698056177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:21,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:21,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 20:44:21,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051135689] [2021-08-06 20:44:21,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:44:21,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:21,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:44:21,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:44:21,559 INFO L87 Difference]: Start difference. First operand 283 states and 612 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:22,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:22,014 INFO L93 Difference]: Finished difference Result 420 states and 858 transitions. [2021-08-06 20:44:22,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:44:22,015 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:22,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:22,017 INFO L225 Difference]: With dead ends: 420 [2021-08-06 20:44:22,017 INFO L226 Difference]: Without dead ends: 415 [2021-08-06 20:44:22,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 443.4ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:44:22,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-06 20:44:22,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 292. [2021-08-06 20:44:22,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.178694158075601) internal successors, (634), 291 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:22,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 634 transitions. [2021-08-06 20:44:22,026 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 634 transitions. Word has length 26 [2021-08-06 20:44:22,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:22,027 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 634 transitions. [2021-08-06 20:44:22,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:22,027 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 634 transitions. [2021-08-06 20:44:22,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:22,029 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:22,029 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:22,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:22,229 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 [2021-08-06 20:44:22,229 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:22,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:22,230 INFO L82 PathProgramCache]: Analyzing trace with hash 320089054, now seen corresponding path program 5 times [2021-08-06 20:44:22,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:22,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991465499] [2021-08-06 20:44:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:22,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:22,358 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 62, result has 53.7 percent of original size [2021-08-06 20:44:22,371 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 62, result has 53.7 percent of original size [2021-08-06 20:44:22,517 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 63.6 percent of original size [2021-08-06 20:44:22,520 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 63.6 percent of original size [2021-08-06 20:44:22,544 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 20:44:22,546 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 20:44:22,567 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:44:22,568 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:44:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:22,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:22,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991465499] [2021-08-06 20:44:22,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991465499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:22,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382992457] [2021-08-06 20:44:22,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:44:22,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:22,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:22,589 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) [2021-08-06 20:44:22,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 20:44:22,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:44:22,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:22,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:44:22,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:23,701 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-06 20:44:23,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 46 [2021-08-06 20:44:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:23,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382992457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:23,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:23,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 20:44:23,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600477789] [2021-08-06 20:44:23,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:44:23,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:23,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:44:23,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:44:23,806 INFO L87 Difference]: Start difference. First operand 292 states and 634 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:24,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:24,561 INFO L93 Difference]: Finished difference Result 415 states and 845 transitions. [2021-08-06 20:44:24,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:44:24,561 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:24,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:24,563 INFO L225 Difference]: With dead ends: 415 [2021-08-06 20:44:24,563 INFO L226 Difference]: Without dead ends: 410 [2021-08-06 20:44:24,563 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 741.2ms TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:44:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-06 20:44:24,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 296. [2021-08-06 20:44:24,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.169491525423729) internal successors, (640), 295 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:24,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 640 transitions. [2021-08-06 20:44:24,571 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 640 transitions. Word has length 26 [2021-08-06 20:44:24,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:24,571 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 640 transitions. [2021-08-06 20:44:24,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:24,571 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 640 transitions. [2021-08-06 20:44:24,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:24,572 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:24,572 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:24,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:24,796 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 [2021-08-06 20:44:24,797 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:24,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:24,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1783447654, now seen corresponding path program 11 times [2021-08-06 20:44:24,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:24,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473467119] [2021-08-06 20:44:24,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:24,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:24,874 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 55, result has 36.8 percent of original size [2021-08-06 20:44:24,879 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 55, result has 36.8 percent of original size [2021-08-06 20:44:24,909 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 69.0 percent of original size [2021-08-06 20:44:24,918 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 69.0 percent of original size [2021-08-06 20:44:24,978 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 69.2 percent of original size [2021-08-06 20:44:24,988 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 69.2 percent of original size [2021-08-06 20:44:25,057 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 34, result has 69.9 percent of original size [2021-08-06 20:44:25,071 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 34, result has 69.9 percent of original size [2021-08-06 20:44:25,146 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 69.6 percent of original size [2021-08-06 20:44:25,154 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 69.6 percent of original size [2021-08-06 20:44:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:25,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:25,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473467119] [2021-08-06 20:44:25,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473467119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:25,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197425204] [2021-08-06 20:44:25,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:44:25,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:25,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:25,319 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) [2021-08-06 20:44:25,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 20:44:25,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:44:25,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:25,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:44:25,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:26,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:44:26,195 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-06 20:44:26,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 27 [2021-08-06 20:44:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:26,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197425204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:26,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:26,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 20:44:26,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225313595] [2021-08-06 20:44:26,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:44:26,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:26,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:44:26,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:44:26,281 INFO L87 Difference]: Start difference. First operand 296 states and 640 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:27,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:27,453 INFO L93 Difference]: Finished difference Result 351 states and 718 transitions. [2021-08-06 20:44:27,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:44:27,453 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:27,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:27,454 INFO L225 Difference]: With dead ends: 351 [2021-08-06 20:44:27,454 INFO L226 Difference]: Without dead ends: 346 [2021-08-06 20:44:27,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1175.6ms TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:44:27,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-08-06 20:44:27,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 304. [2021-08-06 20:44:27,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.155115511551155) internal successors, (653), 303 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:27,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 653 transitions. [2021-08-06 20:44:27,460 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 653 transitions. Word has length 26 [2021-08-06 20:44:27,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:27,460 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 653 transitions. [2021-08-06 20:44:27,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:27,460 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 653 transitions. [2021-08-06 20:44:27,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:27,460 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:27,460 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:27,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:27,661 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 [2021-08-06 20:44:27,661 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:27,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:27,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1596416026, now seen corresponding path program 6 times [2021-08-06 20:44:27,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:27,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457644901] [2021-08-06 20:44:27,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:27,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:27,756 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 62, result has 53.7 percent of original size [2021-08-06 20:44:27,766 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 62, result has 53.7 percent of original size [2021-08-06 20:44:27,949 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 20:44:27,951 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 20:44:27,973 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:44:27,974 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:44:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:27,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:27,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457644901] [2021-08-06 20:44:27,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457644901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:27,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418248944] [2021-08-06 20:44:27,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:44:27,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:27,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:27,993 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) [2021-08-06 20:44:27,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 20:44:28,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:44:28,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:28,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 20:44:28,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:28,979 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:44:28,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2021-08-06 20:44:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:29,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418248944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:29,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:29,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 20:44:29,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910672741] [2021-08-06 20:44:29,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:44:29,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:29,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:44:29,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:44:29,064 INFO L87 Difference]: Start difference. First operand 304 states and 653 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:29,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:29,611 INFO L93 Difference]: Finished difference Result 435 states and 874 transitions. [2021-08-06 20:44:29,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:44:29,612 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:29,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:29,613 INFO L225 Difference]: With dead ends: 435 [2021-08-06 20:44:29,613 INFO L226 Difference]: Without dead ends: 430 [2021-08-06 20:44:29,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 535.7ms TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:44:29,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-08-06 20:44:29,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 304. [2021-08-06 20:44:29,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.155115511551155) internal successors, (653), 303 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:29,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 653 transitions. [2021-08-06 20:44:29,620 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 653 transitions. Word has length 26 [2021-08-06 20:44:29,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:29,620 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 653 transitions. [2021-08-06 20:44:29,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:29,620 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 653 transitions. [2021-08-06 20:44:29,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:29,621 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:29,621 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:29,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:29,836 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 [2021-08-06 20:44:29,837 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:29,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:29,837 INFO L82 PathProgramCache]: Analyzing trace with hash -729726950, now seen corresponding path program 7 times [2021-08-06 20:44:29,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:29,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022434146] [2021-08-06 20:44:29,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:29,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:29,941 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 83.1 percent of original size [2021-08-06 20:44:29,955 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 83.1 percent of original size [2021-08-06 20:44:30,038 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 77.5 percent of original size [2021-08-06 20:44:30,040 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 77.5 percent of original size [2021-08-06 20:44:30,105 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:44:30,106 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:44:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:30,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:30,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022434146] [2021-08-06 20:44:30,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022434146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:30,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770775443] [2021-08-06 20:44:30,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:44:30,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:30,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:30,121 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) [2021-08-06 20:44:30,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 20:44:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:30,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:44:30,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:31,138 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:44:31,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2021-08-06 20:44:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:31,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770775443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:31,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:31,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 20:44:31,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072500640] [2021-08-06 20:44:31,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:44:31,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:31,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:44:31,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:44:31,209 INFO L87 Difference]: Start difference. First operand 304 states and 653 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:32,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:32,079 INFO L93 Difference]: Finished difference Result 527 states and 1054 transitions. [2021-08-06 20:44:32,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:44:32,080 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:32,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:32,082 INFO L225 Difference]: With dead ends: 527 [2021-08-06 20:44:32,082 INFO L226 Difference]: Without dead ends: 522 [2021-08-06 20:44:32,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 713.9ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:44:32,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-08-06 20:44:32,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 308. [2021-08-06 20:44:32,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.1596091205211727) internal successors, (663), 307 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:32,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 663 transitions. [2021-08-06 20:44:32,091 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 663 transitions. Word has length 26 [2021-08-06 20:44:32,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:32,091 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 663 transitions. [2021-08-06 20:44:32,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:32,092 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 663 transitions. [2021-08-06 20:44:32,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:32,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:32,093 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:32,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:32,308 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 [2021-08-06 20:44:32,309 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:32,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:32,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1992855578, now seen corresponding path program 8 times [2021-08-06 20:44:32,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:32,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049067430] [2021-08-06 20:44:32,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:32,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:32,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:32,412 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 83.1 percent of original size [2021-08-06 20:44:32,420 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 83.1 percent of original size [2021-08-06 20:44:32,504 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 77.5 percent of original size [2021-08-06 20:44:32,506 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 77.5 percent of original size [2021-08-06 20:44:32,547 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:44:32,549 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:44:32,565 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:44:32,566 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:44:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:32,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:32,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049067430] [2021-08-06 20:44:32,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049067430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:32,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438697270] [2021-08-06 20:44:32,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:44:32,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:32,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:32,582 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) [2021-08-06 20:44:32,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 20:44:33,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:44:33,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:33,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:44:33,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:33,619 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:44:33,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 44 [2021-08-06 20:44:33,762 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 68.1 percent of original size [2021-08-06 20:44:33,765 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 68.1 percent of original size [2021-08-06 20:44:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:33,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438697270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:33,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:33,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 20:44:33,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984511647] [2021-08-06 20:44:33,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:44:33,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:33,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:44:33,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:44:33,932 INFO L87 Difference]: Start difference. First operand 308 states and 663 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-08-06 20:44:35,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:35,074 INFO L93 Difference]: Finished difference Result 591 states and 1175 transitions. [2021-08-06 20:44:35,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:44:35,074 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-08-06 20:44:35,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:35,076 INFO L225 Difference]: With dead ends: 591 [2021-08-06 20:44:35,077 INFO L226 Difference]: Without dead ends: 586 [2021-08-06 20:44:35,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1024.3ms TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:44:35,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-08-06 20:44:35,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 310. [2021-08-06 20:44:35,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.161812297734628) internal successors, (668), 309 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:35,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 668 transitions. [2021-08-06 20:44:35,085 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 668 transitions. Word has length 26 [2021-08-06 20:44:35,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:35,086 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 668 transitions. [2021-08-06 20:44:35,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-08-06 20:44:35,086 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 668 transitions. [2021-08-06 20:44:35,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:35,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:35,087 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:35,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:35,308 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 [2021-08-06 20:44:35,309 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:35,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:35,309 INFO L82 PathProgramCache]: Analyzing trace with hash -121398562, now seen corresponding path program 9 times [2021-08-06 20:44:35,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:35,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277170239] [2021-08-06 20:44:35,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:35,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:35,406 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 83.1 percent of original size [2021-08-06 20:44:35,414 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 83.1 percent of original size [2021-08-06 20:44:35,508 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 77.5 percent of original size [2021-08-06 20:44:35,509 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 77.5 percent of original size [2021-08-06 20:44:35,531 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 72.7 percent of original size [2021-08-06 20:44:35,533 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 72.7 percent of original size [2021-08-06 20:44:35,552 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:44:35,553 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:44:35,587 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:44:35,588 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:44:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:35,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:35,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277170239] [2021-08-06 20:44:35,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277170239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:35,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479583297] [2021-08-06 20:44:35,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:44:35,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:35,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:35,604 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) [2021-08-06 20:44:35,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 20:44:36,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:44:36,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:36,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:44:36,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:36,635 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:44:36,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-08-06 20:44:36,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:36,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479583297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:36,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:36,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 20:44:36,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438682164] [2021-08-06 20:44:36,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:44:36,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:36,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:44:36,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:44:36,770 INFO L87 Difference]: Start difference. First operand 310 states and 668 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-08-06 20:44:37,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:37,791 INFO L93 Difference]: Finished difference Result 556 states and 1118 transitions. [2021-08-06 20:44:37,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:44:37,793 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-08-06 20:44:37,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:37,795 INFO L225 Difference]: With dead ends: 556 [2021-08-06 20:44:37,795 INFO L226 Difference]: Without dead ends: 551 [2021-08-06 20:44:37,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 936.8ms TimeCoverageRelationStatistics Valid=290, Invalid=1042, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:44:37,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-08-06 20:44:37,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 312. [2021-08-06 20:44:37,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.157556270096463) internal successors, (671), 311 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:37,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 671 transitions. [2021-08-06 20:44:37,803 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 671 transitions. Word has length 26 [2021-08-06 20:44:37,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:37,803 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 671 transitions. [2021-08-06 20:44:37,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-08-06 20:44:37,804 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 671 transitions. [2021-08-06 20:44:37,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:37,804 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:37,804 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:37,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:38,029 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 [2021-08-06 20:44:38,029 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:38,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:38,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1170675738, now seen corresponding path program 10 times [2021-08-06 20:44:38,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:38,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377734490] [2021-08-06 20:44:38,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:38,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:38,133 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 62, result has 53.7 percent of original size [2021-08-06 20:44:38,142 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 62, result has 53.7 percent of original size [2021-08-06 20:44:38,321 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 20:44:38,322 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 20:44:38,340 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:44:38,341 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:44:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:38,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:38,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377734490] [2021-08-06 20:44:38,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377734490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:38,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919888958] [2021-08-06 20:44:38,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:44:38,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:38,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:38,356 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) [2021-08-06 20:44:38,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 20:44:38,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:44:38,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:38,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:44:38,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:39,498 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:44:39,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2021-08-06 20:44:39,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:39,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919888958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:39,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:39,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 20:44:39,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554959472] [2021-08-06 20:44:39,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:44:39,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:39,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:44:39,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:44:39,589 INFO L87 Difference]: Start difference. First operand 312 states and 671 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:40,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:40,255 INFO L93 Difference]: Finished difference Result 505 states and 1002 transitions. [2021-08-06 20:44:40,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:44:40,255 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:40,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:40,257 INFO L225 Difference]: With dead ends: 505 [2021-08-06 20:44:40,257 INFO L226 Difference]: Without dead ends: 500 [2021-08-06 20:44:40,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 685.8ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:44:40,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-08-06 20:44:40,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 316. [2021-08-06 20:44:40,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.165079365079365) internal successors, (682), 315 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:40,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 682 transitions. [2021-08-06 20:44:40,264 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 682 transitions. Word has length 26 [2021-08-06 20:44:40,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:40,265 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 682 transitions. [2021-08-06 20:44:40,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:40,265 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 682 transitions. [2021-08-06 20:44:40,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:40,266 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:40,266 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:40,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:40,490 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 [2021-08-06 20:44:40,490 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:40,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:40,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1016721510, now seen corresponding path program 12 times [2021-08-06 20:44:40,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:40,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067216992] [2021-08-06 20:44:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:40,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:40,555 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 55, result has 36.8 percent of original size [2021-08-06 20:44:40,560 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 55, result has 36.8 percent of original size [2021-08-06 20:44:40,590 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 69.0 percent of original size [2021-08-06 20:44:40,598 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 69.0 percent of original size [2021-08-06 20:44:40,651 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 69.2 percent of original size [2021-08-06 20:44:40,661 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 69.2 percent of original size [2021-08-06 20:44:40,722 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 35, result has 69.3 percent of original size [2021-08-06 20:44:40,732 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 35, result has 69.3 percent of original size [2021-08-06 20:44:40,786 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 81.6 percent of original size [2021-08-06 20:44:40,789 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 81.6 percent of original size [2021-08-06 20:44:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:40,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:40,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067216992] [2021-08-06 20:44:40,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067216992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:40,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216279128] [2021-08-06 20:44:40,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:44:40,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:40,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:40,897 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) [2021-08-06 20:44:40,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 20:44:41,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:44:41,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:41,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:44:41,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:42,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:44:42,382 INFO L354 Elim1Store]: treesize reduction 23, result has 48.9 percent of original size [2021-08-06 20:44:42,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 48 [2021-08-06 20:44:42,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:42,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216279128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:42,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:42,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-08-06 20:44:42,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127649518] [2021-08-06 20:44:42,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:44:42,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:42,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:44:42,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:44:42,791 INFO L87 Difference]: Start difference. First operand 316 states and 682 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:44,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:44,844 INFO L93 Difference]: Finished difference Result 404 states and 809 transitions. [2021-08-06 20:44:44,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 20:44:44,844 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:44,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:44,845 INFO L225 Difference]: With dead ends: 404 [2021-08-06 20:44:44,845 INFO L226 Difference]: Without dead ends: 399 [2021-08-06 20:44:44,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 2012.9ms TimeCoverageRelationStatistics Valid=401, Invalid=2251, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 20:44:44,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-08-06 20:44:44,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 316. [2021-08-06 20:44:44,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.165079365079365) internal successors, (682), 315 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:44,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 682 transitions. [2021-08-06 20:44:44,852 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 682 transitions. Word has length 26 [2021-08-06 20:44:44,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:44,852 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 682 transitions. [2021-08-06 20:44:44,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:44,853 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 682 transitions. [2021-08-06 20:44:44,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:44,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:44,853 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:44,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:45,068 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 [2021-08-06 20:44:45,069 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:45,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:45,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1786750874, now seen corresponding path program 13 times [2021-08-06 20:44:45,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:45,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947810311] [2021-08-06 20:44:45,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:45,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:45,118 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 79.5 percent of original size [2021-08-06 20:44:45,121 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 79.5 percent of original size [2021-08-06 20:44:45,152 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 79.5 percent of original size [2021-08-06 20:44:45,155 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 79.5 percent of original size [2021-08-06 20:44:45,187 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 81.6 percent of original size [2021-08-06 20:44:45,191 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 81.6 percent of original size [2021-08-06 20:44:45,237 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 85.9 percent of original size [2021-08-06 20:44:45,242 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 85.9 percent of original size [2021-08-06 20:44:45,364 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 81.1 percent of original size [2021-08-06 20:44:45,366 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 81.1 percent of original size [2021-08-06 20:44:45,392 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 77.4 percent of original size [2021-08-06 20:44:45,394 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 77.4 percent of original size [2021-08-06 20:44:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:45,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:45,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947810311] [2021-08-06 20:44:45,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947810311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:45,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50295113] [2021-08-06 20:44:45,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:44:45,416 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:45,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:45,417 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) [2021-08-06 20:44:45,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 20:44:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:46,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:44:46,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:46,537 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 20:44:46,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 23 [2021-08-06 20:44:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:46,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50295113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:46,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:46,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-08-06 20:44:46,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331827687] [2021-08-06 20:44:46,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:44:46,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:46,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:44:46,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:44:46,649 INFO L87 Difference]: Start difference. First operand 316 states and 682 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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) [2021-08-06 20:44:48,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:48,292 INFO L93 Difference]: Finished difference Result 639 states and 1228 transitions. [2021-08-06 20:44:48,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 20:44:48,292 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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 26 [2021-08-06 20:44:48,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:48,294 INFO L225 Difference]: With dead ends: 639 [2021-08-06 20:44:48,294 INFO L226 Difference]: Without dead ends: 624 [2021-08-06 20:44:48,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1533.6ms TimeCoverageRelationStatistics Valid=445, Invalid=2105, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 20:44:48,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-08-06 20:44:48,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 331. [2021-08-06 20:44:48,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.1818181818181817) internal successors, (720), 330 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:48,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 720 transitions. [2021-08-06 20:44:48,303 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 720 transitions. Word has length 26 [2021-08-06 20:44:48,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:48,303 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 720 transitions. [2021-08-06 20:44:48,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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) [2021-08-06 20:44:48,303 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 720 transitions. [2021-08-06 20:44:48,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:48,304 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:48,304 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:48,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:48,518 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 [2021-08-06 20:44:48,518 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:48,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:48,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1931825126, now seen corresponding path program 11 times [2021-08-06 20:44:48,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:48,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071506994] [2021-08-06 20:44:48,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:48,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:48,617 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 83.1 percent of original size [2021-08-06 20:44:48,626 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 83.1 percent of original size [2021-08-06 20:44:48,741 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 72.7 percent of original size [2021-08-06 20:44:48,743 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 72.7 percent of original size [2021-08-06 20:44:48,762 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:44:48,763 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:44:48,779 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:44:48,779 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:44:48,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:48,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:48,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071506994] [2021-08-06 20:44:48,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071506994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:48,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251593088] [2021-08-06 20:44:48,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:44:48,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:48,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:48,795 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) [2021-08-06 20:44:48,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 20:44:49,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:44:49,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:49,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 20:44:49,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:49,998 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:44:49,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 26 [2021-08-06 20:44:50,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:50,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251593088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:50,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:50,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 20:44:50,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890278275] [2021-08-06 20:44:50,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:44:50,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:50,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:44:50,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:44:50,137 INFO L87 Difference]: Start difference. First operand 331 states and 720 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-08-06 20:44:51,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:51,594 INFO L93 Difference]: Finished difference Result 632 states and 1248 transitions. [2021-08-06 20:44:51,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:44:51,595 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 26 [2021-08-06 20:44:51,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:51,596 INFO L225 Difference]: With dead ends: 632 [2021-08-06 20:44:51,596 INFO L226 Difference]: Without dead ends: 627 [2021-08-06 20:44:51,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1316.8ms TimeCoverageRelationStatistics Valid=371, Invalid=1521, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:44:51,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-08-06 20:44:51,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 329. [2021-08-06 20:44:51,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.176829268292683) internal successors, (714), 328 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:51,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 714 transitions. [2021-08-06 20:44:51,604 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 714 transitions. Word has length 26 [2021-08-06 20:44:51,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:51,604 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 714 transitions. [2021-08-06 20:44:51,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-08-06 20:44:51,604 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 714 transitions. [2021-08-06 20:44:51,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:51,605 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:51,605 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:51,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-06 20:44:51,816 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 [2021-08-06 20:44:51,817 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:51,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:51,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1705861018, now seen corresponding path program 14 times [2021-08-06 20:44:51,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:51,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543721149] [2021-08-06 20:44:51,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:51,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:51,864 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 79.5 percent of original size [2021-08-06 20:44:51,868 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 79.5 percent of original size [2021-08-06 20:44:51,899 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 79.5 percent of original size [2021-08-06 20:44:51,903 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 79.5 percent of original size [2021-08-06 20:44:51,932 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 81.6 percent of original size [2021-08-06 20:44:51,935 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 81.6 percent of original size [2021-08-06 20:44:51,982 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 85.9 percent of original size [2021-08-06 20:44:51,987 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 85.9 percent of original size [2021-08-06 20:44:52,090 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 83.3 percent of original size [2021-08-06 20:44:52,092 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 83.3 percent of original size [2021-08-06 20:44:52,119 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 81.1 percent of original size [2021-08-06 20:44:52,122 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 81.1 percent of original size [2021-08-06 20:44:52,146 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 77.4 percent of original size [2021-08-06 20:44:52,147 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 77.4 percent of original size [2021-08-06 20:44:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:52,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:52,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543721149] [2021-08-06 20:44:52,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543721149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:52,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227946175] [2021-08-06 20:44:52,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:44:52,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:52,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:52,170 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) [2021-08-06 20:44:52,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 20:44:52,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:44:52,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:52,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:44:52,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:53,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:44:53,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:44:53,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:44:53,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:44:53,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-08-06 20:44:53,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:53,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227946175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:53,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:53,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-08-06 20:44:53,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541663753] [2021-08-06 20:44:53,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:44:53,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:53,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:44:53,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:44:53,768 INFO L87 Difference]: Start difference. First operand 329 states and 714 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:56,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:56,361 INFO L93 Difference]: Finished difference Result 657 states and 1307 transitions. [2021-08-06 20:44:56,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 20:44:56,361 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:56,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:56,363 INFO L225 Difference]: With dead ends: 657 [2021-08-06 20:44:56,363 INFO L226 Difference]: Without dead ends: 652 [2021-08-06 20:44:56,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 2292.0ms TimeCoverageRelationStatistics Valid=625, Invalid=2681, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 20:44:56,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-08-06 20:44:56,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 329. [2021-08-06 20:44:56,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.176829268292683) internal successors, (714), 328 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:56,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 714 transitions. [2021-08-06 20:44:56,369 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 714 transitions. Word has length 26 [2021-08-06 20:44:56,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:56,370 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 714 transitions. [2021-08-06 20:44:56,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:56,370 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 714 transitions. [2021-08-06 20:44:56,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:56,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:56,371 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:56,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:56,584 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 [2021-08-06 20:44:56,585 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:56,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:56,585 INFO L82 PathProgramCache]: Analyzing trace with hash -983480102, now seen corresponding path program 12 times [2021-08-06 20:44:56,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:56,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630137299] [2021-08-06 20:44:56,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:56,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:56,671 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 83.3 percent of original size [2021-08-06 20:44:56,677 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 83.3 percent of original size [2021-08-06 20:44:56,725 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 82.9 percent of original size [2021-08-06 20:44:56,731 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 82.9 percent of original size [2021-08-06 20:44:56,768 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 68.7 percent of original size [2021-08-06 20:44:56,772 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 68.7 percent of original size [2021-08-06 20:44:56,844 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:44:56,847 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:44:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:56,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:56,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630137299] [2021-08-06 20:44:56,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630137299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:56,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418950556] [2021-08-06 20:44:56,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:44:56,862 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:56,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:56,863 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) [2021-08-06 20:44:56,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 20:44:57,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:44:57,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:57,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 20:44:57,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:58,287 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:44:58,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2021-08-06 20:44:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:58,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418950556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:58,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:58,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 20:44:58,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251678964] [2021-08-06 20:44:58,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:44:58,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:58,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:44:58,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:44:58,367 INFO L87 Difference]: Start difference. First operand 329 states and 714 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:58,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:58,785 INFO L93 Difference]: Finished difference Result 451 states and 938 transitions. [2021-08-06 20:44:58,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:44:58,786 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:44:58,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:58,787 INFO L225 Difference]: With dead ends: 451 [2021-08-06 20:44:58,787 INFO L226 Difference]: Without dead ends: 446 [2021-08-06 20:44:58,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 468.2ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:44:58,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-08-06 20:44:58,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 337. [2021-08-06 20:44:58,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.1726190476190474) internal successors, (730), 336 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 730 transitions. [2021-08-06 20:44:58,792 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 730 transitions. Word has length 26 [2021-08-06 20:44:58,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:58,793 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 730 transitions. [2021-08-06 20:44:58,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:58,793 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 730 transitions. [2021-08-06 20:44:58,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:44:58,793 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:58,793 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:58,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:59,001 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 [2021-08-06 20:44:59,001 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:59,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:59,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1739102426, now seen corresponding path program 13 times [2021-08-06 20:44:59,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:59,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757038709] [2021-08-06 20:44:59,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:59,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:59,094 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 83.3 percent of original size [2021-08-06 20:44:59,099 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 83.3 percent of original size [2021-08-06 20:44:59,148 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 82.9 percent of original size [2021-08-06 20:44:59,153 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 82.9 percent of original size [2021-08-06 20:44:59,195 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 68.7 percent of original size [2021-08-06 20:44:59,198 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 68.7 percent of original size [2021-08-06 20:44:59,254 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:44:59,255 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:44:59,272 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:44:59,273 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:44:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:59,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:59,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757038709] [2021-08-06 20:44:59,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757038709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:59,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409702752] [2021-08-06 20:44:59,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:44:59,288 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:59,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:59,289 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) [2021-08-06 20:44:59,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 20:45:00,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:00,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:45:00,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:00,755 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:45:00,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 44 [2021-08-06 20:45:00,892 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 72.7 percent of original size [2021-08-06 20:45:00,897 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 72.7 percent of original size [2021-08-06 20:45:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:01,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409702752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:01,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:01,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 20:45:01,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146034048] [2021-08-06 20:45:01,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:45:01,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:01,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:45:01,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:45:01,013 INFO L87 Difference]: Start difference. First operand 337 states and 730 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-08-06 20:45:01,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:01,634 INFO L93 Difference]: Finished difference Result 514 states and 1051 transitions. [2021-08-06 20:45:01,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:45:01,634 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-08-06 20:45:01,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:01,636 INFO L225 Difference]: With dead ends: 514 [2021-08-06 20:45:01,636 INFO L226 Difference]: Without dead ends: 509 [2021-08-06 20:45:01,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 608.5ms TimeCoverageRelationStatistics Valid=172, Invalid=640, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:45:01,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-08-06 20:45:01,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 339. [2021-08-06 20:45:01,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.1745562130177514) internal successors, (735), 338 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:01,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 735 transitions. [2021-08-06 20:45:01,643 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 735 transitions. Word has length 26 [2021-08-06 20:45:01,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:01,643 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 735 transitions. [2021-08-06 20:45:01,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-08-06 20:45:01,643 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 735 transitions. [2021-08-06 20:45:01,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:01,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:01,644 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:01,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-06 20:45:01,869 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 [2021-08-06 20:45:01,869 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:01,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:01,870 INFO L82 PathProgramCache]: Analyzing trace with hash -2052596322, now seen corresponding path program 14 times [2021-08-06 20:45:01,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:01,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897286762] [2021-08-06 20:45:01,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:01,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:01,963 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 83.3 percent of original size [2021-08-06 20:45:01,968 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 83.3 percent of original size [2021-08-06 20:45:02,016 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 82.9 percent of original size [2021-08-06 20:45:02,022 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 82.9 percent of original size [2021-08-06 20:45:02,059 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 68.7 percent of original size [2021-08-06 20:45:02,063 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 68.7 percent of original size [2021-08-06 20:45:02,115 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:45:02,116 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:45:02,132 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:45:02,133 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:45:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:02,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:02,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897286762] [2021-08-06 20:45:02,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897286762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:02,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297132989] [2021-08-06 20:45:02,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:45:02,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:02,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:02,148 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) [2021-08-06 20:45:02,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 20:45:03,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:45:03,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:03,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:45:03,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:03,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:45:03,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:45:03,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-08-06 20:45:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:03,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297132989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:03,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:03,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 20:45:03,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010408669] [2021-08-06 20:45:03,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:45:03,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:03,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:45:03,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:45:03,679 INFO L87 Difference]: Start difference. First operand 339 states and 735 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:04,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:04,229 INFO L93 Difference]: Finished difference Result 466 states and 973 transitions. [2021-08-06 20:45:04,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:45:04,230 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:45:04,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:04,231 INFO L225 Difference]: With dead ends: 466 [2021-08-06 20:45:04,231 INFO L226 Difference]: Without dead ends: 461 [2021-08-06 20:45:04,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 589.1ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:45:04,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-08-06 20:45:04,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 342. [2021-08-06 20:45:04,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.1847507331378297) internal successors, (745), 341 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:04,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 745 transitions. [2021-08-06 20:45:04,236 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 745 transitions. Word has length 26 [2021-08-06 20:45:04,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:04,236 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 745 transitions. [2021-08-06 20:45:04,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:04,236 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 745 transitions. [2021-08-06 20:45:04,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:04,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:04,237 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:04,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:04,437 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 [2021-08-06 20:45:04,437 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:04,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:04,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1125002074, now seen corresponding path program 15 times [2021-08-06 20:45:04,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:04,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076524003] [2021-08-06 20:45:04,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:04,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:04,524 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 83.1 percent of original size [2021-08-06 20:45:04,531 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 83.1 percent of original size [2021-08-06 20:45:04,593 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 82.7 percent of original size [2021-08-06 20:45:04,600 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 82.7 percent of original size [2021-08-06 20:45:04,646 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 78.0 percent of original size [2021-08-06 20:45:04,647 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 78.0 percent of original size [2021-08-06 20:45:04,688 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:45:04,690 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:45:04,708 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:45:04,710 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:45:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:04,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:04,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076524003] [2021-08-06 20:45:04,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076524003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:04,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640968383] [2021-08-06 20:45:04,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:45:04,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:04,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:04,727 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) [2021-08-06 20:45:04,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 20:45:05,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:45:05,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:05,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:45:05,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:06,171 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:45:06,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 44 [2021-08-06 20:45:06,290 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 68.1 percent of original size [2021-08-06 20:45:06,293 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 68.1 percent of original size [2021-08-06 20:45:06,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:06,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640968383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:06,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:06,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 20:45:06,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841782707] [2021-08-06 20:45:06,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:45:06,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:06,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:45:06,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:45:06,409 INFO L87 Difference]: Start difference. First operand 342 states and 745 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-08-06 20:45:06,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:06,864 INFO L93 Difference]: Finished difference Result 488 states and 1018 transitions. [2021-08-06 20:45:06,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:45:06,865 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-08-06 20:45:06,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:06,866 INFO L225 Difference]: With dead ends: 488 [2021-08-06 20:45:06,866 INFO L226 Difference]: Without dead ends: 483 [2021-08-06 20:45:06,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 513.1ms TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:45:06,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-08-06 20:45:06,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 344. [2021-08-06 20:45:06,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.183673469387755) internal successors, (749), 343 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:06,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 749 transitions. [2021-08-06 20:45:06,872 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 749 transitions. Word has length 26 [2021-08-06 20:45:06,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:06,872 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 749 transitions. [2021-08-06 20:45:06,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-08-06 20:45:06,872 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 749 transitions. [2021-08-06 20:45:06,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:06,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:06,873 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:06,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-06 20:45:07,083 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 [2021-08-06 20:45:07,084 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:07,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:07,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1758141146, now seen corresponding path program 16 times [2021-08-06 20:45:07,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:07,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126731836] [2021-08-06 20:45:07,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:07,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:07,172 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 65, result has 52.6 percent of original size [2021-08-06 20:45:07,181 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 65, result has 52.6 percent of original size [2021-08-06 20:45:07,392 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 20:45:07,394 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 20:45:07,416 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:45:07,418 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:45:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:07,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:07,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126731836] [2021-08-06 20:45:07,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126731836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:07,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969979687] [2021-08-06 20:45:07,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:45:07,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:07,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:07,437 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) [2021-08-06 20:45:07,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 20:45:08,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:45:08,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:08,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:45:08,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:08,975 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:45:08,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2021-08-06 20:45:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:09,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969979687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:09,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:09,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 20:45:09,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132594564] [2021-08-06 20:45:09,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:45:09,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:09,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:45:09,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:45:09,065 INFO L87 Difference]: Start difference. First operand 344 states and 749 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:09,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:09,477 INFO L93 Difference]: Finished difference Result 473 states and 978 transitions. [2021-08-06 20:45:09,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:45:09,477 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:45:09,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:09,478 INFO L225 Difference]: With dead ends: 473 [2021-08-06 20:45:09,479 INFO L226 Difference]: Without dead ends: 468 [2021-08-06 20:45:09,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 481.0ms TimeCoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:45:09,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-08-06 20:45:09,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 347. [2021-08-06 20:45:09,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.19364161849711) internal successors, (759), 346 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:09,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 759 transitions. [2021-08-06 20:45:09,485 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 759 transitions. Word has length 26 [2021-08-06 20:45:09,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:09,485 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 759 transitions. [2021-08-06 20:45:09,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:09,485 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 759 transitions. [2021-08-06 20:45:09,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:09,486 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:09,486 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:09,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:09,709 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 [2021-08-06 20:45:09,709 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:09,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:09,709 INFO L82 PathProgramCache]: Analyzing trace with hash -429256102, now seen corresponding path program 15 times [2021-08-06 20:45:09,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:09,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415303077] [2021-08-06 20:45:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:09,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:09,769 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 55, result has 36.8 percent of original size [2021-08-06 20:45:09,773 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 55, result has 36.8 percent of original size [2021-08-06 20:45:09,800 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 69.0 percent of original size [2021-08-06 20:45:09,806 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 69.0 percent of original size [2021-08-06 20:45:09,858 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 69.2 percent of original size [2021-08-06 20:45:09,866 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 69.2 percent of original size [2021-08-06 20:45:09,918 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 51, result has 59.2 percent of original size [2021-08-06 20:45:09,927 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 51, result has 59.2 percent of original size [2021-08-06 20:45:09,972 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 81.6 percent of original size [2021-08-06 20:45:09,974 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 81.6 percent of original size [2021-08-06 20:45:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:10,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:10,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415303077] [2021-08-06 20:45:10,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415303077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:10,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885784991] [2021-08-06 20:45:10,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:45:10,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:10,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:10,090 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) [2021-08-06 20:45:10,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 20:45:11,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:45:11,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:11,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:45:11,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:11,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:45:11,897 INFO L354 Elim1Store]: treesize reduction 23, result has 48.9 percent of original size [2021-08-06 20:45:11,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 48 [2021-08-06 20:45:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:12,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885784991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:12,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:12,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-08-06 20:45:12,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821650225] [2021-08-06 20:45:12,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:45:12,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:12,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:45:12,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:45:12,197 INFO L87 Difference]: Start difference. First operand 347 states and 759 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:13,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:13,972 INFO L93 Difference]: Finished difference Result 435 states and 885 transitions. [2021-08-06 20:45:13,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 20:45:13,972 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:45:13,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:13,974 INFO L225 Difference]: With dead ends: 435 [2021-08-06 20:45:13,974 INFO L226 Difference]: Without dead ends: 425 [2021-08-06 20:45:13,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1758.8ms TimeCoverageRelationStatistics Valid=399, Invalid=2253, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 20:45:13,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-08-06 20:45:13,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 347. [2021-08-06 20:45:13,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.19364161849711) internal successors, (759), 346 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:13,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 759 transitions. [2021-08-06 20:45:13,979 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 759 transitions. Word has length 26 [2021-08-06 20:45:13,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:13,979 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 759 transitions. [2021-08-06 20:45:13,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:13,980 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 759 transitions. [2021-08-06 20:45:13,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:13,980 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:13,980 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:14,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-06 20:45:14,190 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 [2021-08-06 20:45:14,190 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:14,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:14,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1920751014, now seen corresponding path program 16 times [2021-08-06 20:45:14,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:14,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145529031] [2021-08-06 20:45:14,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:14,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:14,236 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 79.5 percent of original size [2021-08-06 20:45:14,239 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 79.5 percent of original size [2021-08-06 20:45:14,271 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 79.5 percent of original size [2021-08-06 20:45:14,275 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 79.5 percent of original size [2021-08-06 20:45:14,308 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 81.6 percent of original size [2021-08-06 20:45:14,311 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 81.6 percent of original size [2021-08-06 20:45:14,350 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 68.9 percent of original size [2021-08-06 20:45:14,355 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 68.9 percent of original size [2021-08-06 20:45:14,476 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 81.1 percent of original size [2021-08-06 20:45:14,478 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 81.1 percent of original size [2021-08-06 20:45:14,508 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 77.4 percent of original size [2021-08-06 20:45:14,510 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 77.4 percent of original size [2021-08-06 20:45:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:14,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:14,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145529031] [2021-08-06 20:45:14,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145529031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:14,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710091370] [2021-08-06 20:45:14,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:45:14,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:14,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:14,538 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) [2021-08-06 20:45:14,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 20:45:15,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:45:15,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:15,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:45:15,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:16,142 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 20:45:16,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 23 [2021-08-06 20:45:16,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:16,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710091370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:16,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:16,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-08-06 20:45:16,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295410207] [2021-08-06 20:45:16,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:45:16,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:16,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:45:16,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:45:16,253 INFO L87 Difference]: Start difference. First operand 347 states and 759 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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) [2021-08-06 20:45:17,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:17,402 INFO L93 Difference]: Finished difference Result 584 states and 1174 transitions. [2021-08-06 20:45:17,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:45:17,402 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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 26 [2021-08-06 20:45:17,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:17,414 INFO L225 Difference]: With dead ends: 584 [2021-08-06 20:45:17,414 INFO L226 Difference]: Without dead ends: 574 [2021-08-06 20:45:17,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1148.6ms TimeCoverageRelationStatistics Valid=346, Invalid=1634, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 20:45:17,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-08-06 20:45:17,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 375. [2021-08-06 20:45:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 2.213903743315508) internal successors, (828), 374 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:17,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 828 transitions. [2021-08-06 20:45:17,423 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 828 transitions. Word has length 26 [2021-08-06 20:45:17,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:17,423 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 828 transitions. [2021-08-06 20:45:17,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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) [2021-08-06 20:45:17,423 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 828 transitions. [2021-08-06 20:45:17,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:17,424 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:17,424 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:17,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:17,636 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 [2021-08-06 20:45:17,637 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:17,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:17,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1344359718, now seen corresponding path program 17 times [2021-08-06 20:45:17,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:17,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206323168] [2021-08-06 20:45:17,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:17,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:17,715 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 83.1 percent of original size [2021-08-06 20:45:17,722 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 83.1 percent of original size [2021-08-06 20:45:17,828 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 72.7 percent of original size [2021-08-06 20:45:17,830 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 72.7 percent of original size [2021-08-06 20:45:17,848 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:45:17,849 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:45:17,865 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:45:17,866 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:45:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:17,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:17,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206323168] [2021-08-06 20:45:17,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206323168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:17,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652060910] [2021-08-06 20:45:17,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:45:17,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:17,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:17,881 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) [2021-08-06 20:45:17,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 20:45:19,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:45:19,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:19,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 20:45:19,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:19,523 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-08-06 20:45:19,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 57 [2021-08-06 20:45:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:19,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652060910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:19,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:19,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 20:45:19,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033499190] [2021-08-06 20:45:19,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:45:19,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:19,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:45:19,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:45:19,654 INFO L87 Difference]: Start difference. First operand 375 states and 828 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-08-06 20:45:20,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:20,676 INFO L93 Difference]: Finished difference Result 614 states and 1266 transitions. [2021-08-06 20:45:20,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:45:20,676 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 26 [2021-08-06 20:45:20,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:20,678 INFO L225 Difference]: With dead ends: 614 [2021-08-06 20:45:20,678 INFO L226 Difference]: Without dead ends: 609 [2021-08-06 20:45:20,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 829.3ms TimeCoverageRelationStatistics Valid=300, Invalid=1182, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:45:20,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-08-06 20:45:20,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 377. [2021-08-06 20:45:20,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.2180851063829787) internal successors, (834), 376 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:20,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 834 transitions. [2021-08-06 20:45:20,686 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 834 transitions. Word has length 26 [2021-08-06 20:45:20,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:20,686 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 834 transitions. [2021-08-06 20:45:20,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-08-06 20:45:20,686 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 834 transitions. [2021-08-06 20:45:20,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:20,687 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:20,687 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:20,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-06 20:45:20,892 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 [2021-08-06 20:45:20,893 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:20,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:20,893 INFO L82 PathProgramCache]: Analyzing trace with hash -2001640870, now seen corresponding path program 17 times [2021-08-06 20:45:20,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:20,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39657959] [2021-08-06 20:45:20,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:20,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:20,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:20,944 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 79.5 percent of original size [2021-08-06 20:45:20,947 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 79.5 percent of original size [2021-08-06 20:45:20,979 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 79.5 percent of original size [2021-08-06 20:45:20,982 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 79.5 percent of original size [2021-08-06 20:45:21,014 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 81.6 percent of original size [2021-08-06 20:45:21,017 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 81.6 percent of original size [2021-08-06 20:45:21,050 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 68.9 percent of original size [2021-08-06 20:45:21,054 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 68.9 percent of original size [2021-08-06 20:45:21,134 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 83.3 percent of original size [2021-08-06 20:45:21,137 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 83.3 percent of original size [2021-08-06 20:45:21,164 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 81.1 percent of original size [2021-08-06 20:45:21,166 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 81.1 percent of original size [2021-08-06 20:45:21,191 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 77.4 percent of original size [2021-08-06 20:45:21,193 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 77.4 percent of original size [2021-08-06 20:45:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:21,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:21,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39657959] [2021-08-06 20:45:21,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39657959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:21,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529916857] [2021-08-06 20:45:21,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:45:21,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:21,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:21,219 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) [2021-08-06 20:45:21,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 20:45:22,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:45:22,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:22,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:45:22,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:22,771 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 20:45:22,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 41 [2021-08-06 20:45:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:22,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529916857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:22,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:22,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-08-06 20:45:22,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686406908] [2021-08-06 20:45:22,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:45:22,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:22,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:45:22,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:45:22,937 INFO L87 Difference]: Start difference. First operand 377 states and 834 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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) [2021-08-06 20:45:24,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:24,861 INFO L93 Difference]: Finished difference Result 635 states and 1308 transitions. [2021-08-06 20:45:24,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:45:24,861 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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 26 [2021-08-06 20:45:24,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:24,863 INFO L225 Difference]: With dead ends: 635 [2021-08-06 20:45:24,863 INFO L226 Difference]: Without dead ends: 619 [2021-08-06 20:45:24,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1753.0ms TimeCoverageRelationStatistics Valid=477, Invalid=1875, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 20:45:24,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-08-06 20:45:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 383. [2021-08-06 20:45:24,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.217277486910995) internal successors, (847), 382 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:24,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 847 transitions. [2021-08-06 20:45:24,870 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 847 transitions. Word has length 26 [2021-08-06 20:45:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:24,870 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 847 transitions. [2021-08-06 20:45:24,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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) [2021-08-06 20:45:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 847 transitions. [2021-08-06 20:45:24,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:24,871 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:24,871 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:24,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-06 20:45:25,080 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 [2021-08-06 20:45:25,080 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:25,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:25,080 INFO L82 PathProgramCache]: Analyzing trace with hash 836353438, now seen corresponding path program 18 times [2021-08-06 20:45:25,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:25,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251684172] [2021-08-06 20:45:25,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:25,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:25,182 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 83.1 percent of original size [2021-08-06 20:45:25,189 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 83.1 percent of original size [2021-08-06 20:45:25,269 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 78.0 percent of original size [2021-08-06 20:45:25,270 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 78.0 percent of original size [2021-08-06 20:45:25,305 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:45:25,307 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:45:25,323 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:45:25,324 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:45:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:25,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:25,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251684172] [2021-08-06 20:45:25,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251684172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:25,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207786640] [2021-08-06 20:45:25,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:45:25,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:25,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:25,339 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) [2021-08-06 20:45:25,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 20:45:26,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:45:26,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:26,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:45:26,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:27,059 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:45:27,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 67 [2021-08-06 20:45:27,633 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:45:27,636 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:45:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:27,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207786640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:27,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:27,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 20:45:27,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843868583] [2021-08-06 20:45:27,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:45:27,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:27,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:45:27,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:45:27,711 INFO L87 Difference]: Start difference. First operand 383 states and 847 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) 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) [2021-08-06 20:45:29,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:29,008 INFO L93 Difference]: Finished difference Result 599 states and 1225 transitions. [2021-08-06 20:45:29,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:45:29,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) 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 26 [2021-08-06 20:45:29,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:29,010 INFO L225 Difference]: With dead ends: 599 [2021-08-06 20:45:29,010 INFO L226 Difference]: Without dead ends: 589 [2021-08-06 20:45:29,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1174.5ms TimeCoverageRelationStatistics Valid=285, Invalid=1437, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:45:29,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-08-06 20:45:29,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 379. [2021-08-06 20:45:29,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.2142857142857144) internal successors, (837), 378 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:29,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 837 transitions. [2021-08-06 20:45:29,016 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 837 transitions. Word has length 26 [2021-08-06 20:45:29,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:29,016 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 837 transitions. [2021-08-06 20:45:29,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) 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) [2021-08-06 20:45:29,016 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 837 transitions. [2021-08-06 20:45:29,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:29,017 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:29,017 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:29,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:29,219 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 [2021-08-06 20:45:29,219 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:29,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:29,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1935474206, now seen corresponding path program 18 times [2021-08-06 20:45:29,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:29,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588576318] [2021-08-06 20:45:29,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:29,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:29,264 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 79.5 percent of original size [2021-08-06 20:45:29,267 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 79.5 percent of original size [2021-08-06 20:45:29,298 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 80.0 percent of original size [2021-08-06 20:45:29,302 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 80.0 percent of original size [2021-08-06 20:45:29,351 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 82.0 percent of original size [2021-08-06 20:45:29,355 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 82.0 percent of original size [2021-08-06 20:45:29,393 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 69.4 percent of original size [2021-08-06 20:45:29,397 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 69.4 percent of original size [2021-08-06 20:45:29,437 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 77.6 percent of original size [2021-08-06 20:45:29,443 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 77.6 percent of original size [2021-08-06 20:45:29,493 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 80.6 percent of original size [2021-08-06 20:45:29,495 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 80.6 percent of original size [2021-08-06 20:45:29,520 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 72.3 percent of original size [2021-08-06 20:45:29,523 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 72.3 percent of original size [2021-08-06 20:45:29,551 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 82.9 percent of original size [2021-08-06 20:45:29,553 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 82.9 percent of original size [2021-08-06 20:45:29,578 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 79.3 percent of original size [2021-08-06 20:45:29,580 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 79.3 percent of original size [2021-08-06 20:45:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:29,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:29,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588576318] [2021-08-06 20:45:29,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588576318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:29,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588661884] [2021-08-06 20:45:29,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:45:29,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:29,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:29,605 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) [2021-08-06 20:45:29,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 20:45:30,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:45:30,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:30,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:45:30,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:31,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:45:31,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:45:31,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:45:31,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:45:31,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-08-06 20:45:31,367 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 46.2 percent of original size [2021-08-06 20:45:31,369 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 46.2 percent of original size [2021-08-06 20:45:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:31,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588661884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:31,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:31,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-08-06 20:45:31,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687499015] [2021-08-06 20:45:31,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:45:31,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:31,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:45:31,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:45:31,533 INFO L87 Difference]: Start difference. First operand 379 states and 837 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:32,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:32,811 INFO L93 Difference]: Finished difference Result 492 states and 1063 transitions. [2021-08-06 20:45:32,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:45:32,812 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:45:32,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:32,814 INFO L225 Difference]: With dead ends: 492 [2021-08-06 20:45:32,814 INFO L226 Difference]: Without dead ends: 482 [2021-08-06 20:45:32,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1281.0ms TimeCoverageRelationStatistics Valid=329, Invalid=1231, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:45:32,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-08-06 20:45:32,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 379. [2021-08-06 20:45:32,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.2142857142857144) internal successors, (837), 378 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 837 transitions. [2021-08-06 20:45:32,821 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 837 transitions. Word has length 26 [2021-08-06 20:45:32,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:32,821 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 837 transitions. [2021-08-06 20:45:32,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:32,821 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 837 transitions. [2021-08-06 20:45:32,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:32,822 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:32,822 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:32,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:33,049 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 [2021-08-06 20:45:33,049 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:33,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:33,050 INFO L82 PathProgramCache]: Analyzing trace with hash 291662298, now seen corresponding path program 19 times [2021-08-06 20:45:33,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:33,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311302776] [2021-08-06 20:45:33,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:33,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:33,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:33,161 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 68.7 percent of original size [2021-08-06 20:45:33,164 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 68.7 percent of original size [2021-08-06 20:45:33,236 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:45:33,237 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:45:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:33,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:33,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311302776] [2021-08-06 20:45:33,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311302776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:33,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907765596] [2021-08-06 20:45:33,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:45:33,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:33,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:33,252 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) [2021-08-06 20:45:33,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 20:45:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:34,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:45:34,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:35,277 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-06 20:45:35,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 24 [2021-08-06 20:45:35,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:35,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907765596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:35,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:35,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:45:35,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561167226] [2021-08-06 20:45:35,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:45:35,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:35,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:45:35,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:45:35,345 INFO L87 Difference]: Start difference. First operand 379 states and 837 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:35,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:35,653 INFO L93 Difference]: Finished difference Result 538 states and 1136 transitions. [2021-08-06 20:45:35,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:45:35,653 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:45:35,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:35,655 INFO L225 Difference]: With dead ends: 538 [2021-08-06 20:45:35,655 INFO L226 Difference]: Without dead ends: 533 [2021-08-06 20:45:35,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 395.6ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:45:35,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-08-06 20:45:35,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 393. [2021-08-06 20:45:35,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.2244897959183674) internal successors, (872), 392 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:35,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 872 transitions. [2021-08-06 20:45:35,660 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 872 transitions. Word has length 26 [2021-08-06 20:45:35,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:35,660 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 872 transitions. [2021-08-06 20:45:35,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:35,660 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 872 transitions. [2021-08-06 20:45:35,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:35,661 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:35,661 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:35,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:35,861 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 [2021-08-06 20:45:35,862 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:35,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:35,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1280722470, now seen corresponding path program 20 times [2021-08-06 20:45:35,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:35,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555358091] [2021-08-06 20:45:35,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:35,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:35,989 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 68.7 percent of original size [2021-08-06 20:45:35,994 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 68.7 percent of original size [2021-08-06 20:45:36,055 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:45:36,057 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:45:36,074 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:45:36,075 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:45:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:36,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:36,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555358091] [2021-08-06 20:45:36,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555358091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:36,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543071046] [2021-08-06 20:45:36,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:45:36,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:36,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:36,092 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) [2021-08-06 20:45:36,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 20:45:37,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:45:37,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:37,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:45:37,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:37,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:45:37,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:45:37,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-08-06 20:45:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:38,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543071046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:38,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:38,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 20:45:38,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084871822] [2021-08-06 20:45:38,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:45:38,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:38,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:45:38,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:45:38,048 INFO L87 Difference]: Start difference. First operand 393 states and 872 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:38,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:38,658 INFO L93 Difference]: Finished difference Result 606 states and 1263 transitions. [2021-08-06 20:45:38,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:45:38,658 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:45:38,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:38,660 INFO L225 Difference]: With dead ends: 606 [2021-08-06 20:45:38,660 INFO L226 Difference]: Without dead ends: 601 [2021-08-06 20:45:38,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 600.8ms TimeCoverageRelationStatistics Valid=188, Invalid=742, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:45:38,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-08-06 20:45:38,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 395. [2021-08-06 20:45:38,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.2258883248730963) internal successors, (877), 394 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:38,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 877 transitions. [2021-08-06 20:45:38,667 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 877 transitions. Word has length 26 [2021-08-06 20:45:38,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:38,667 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 877 transitions. [2021-08-06 20:45:38,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:38,667 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 877 transitions. [2021-08-06 20:45:38,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:38,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:38,668 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:38,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-06 20:45:38,880 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 [2021-08-06 20:45:38,881 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:38,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:38,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1454412646, now seen corresponding path program 21 times [2021-08-06 20:45:38,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:38,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572501910] [2021-08-06 20:45:38,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:38,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:38,993 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 68.7 percent of original size [2021-08-06 20:45:38,997 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 68.7 percent of original size [2021-08-06 20:45:39,049 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:45:39,051 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:45:39,067 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:45:39,068 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:45:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:39,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:39,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572501910] [2021-08-06 20:45:39,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572501910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:39,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282817964] [2021-08-06 20:45:39,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:45:39,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:39,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:39,083 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) [2021-08-06 20:45:39,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 20:45:40,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:45:40,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:40,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:45:40,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:40,968 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:45:40,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 44 [2021-08-06 20:45:41,075 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 72.7 percent of original size [2021-08-06 20:45:41,079 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 72.7 percent of original size [2021-08-06 20:45:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:41,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282817964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:41,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:41,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:45:41,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189417003] [2021-08-06 20:45:41,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:45:41,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:41,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:45:41,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:45:41,207 INFO L87 Difference]: Start difference. First operand 395 states and 877 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:41,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:41,569 INFO L93 Difference]: Finished difference Result 545 states and 1160 transitions. [2021-08-06 20:45:41,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:45:41,569 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:45:41,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:41,571 INFO L225 Difference]: With dead ends: 545 [2021-08-06 20:45:41,571 INFO L226 Difference]: Without dead ends: 540 [2021-08-06 20:45:41,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 397.9ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:45:41,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-08-06 20:45:41,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 400. [2021-08-06 20:45:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.2280701754385963) internal successors, (889), 399 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:41,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 889 transitions. [2021-08-06 20:45:41,579 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 889 transitions. Word has length 26 [2021-08-06 20:45:41,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:41,579 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 889 transitions. [2021-08-06 20:45:41,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:41,579 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 889 transitions. [2021-08-06 20:45:41,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:41,580 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:41,580 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:41,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:41,796 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 [2021-08-06 20:45:41,797 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:41,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:41,797 INFO L82 PathProgramCache]: Analyzing trace with hash -2046217062, now seen corresponding path program 22 times [2021-08-06 20:45:41,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:41,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517046967] [2021-08-06 20:45:41,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:41,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:42,003 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:45:42,004 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:45:42,044 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:45:42,045 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:45:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:42,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:42,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517046967] [2021-08-06 20:45:42,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517046967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:42,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029558248] [2021-08-06 20:45:42,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:45:42,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:42,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:42,059 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) [2021-08-06 20:45:42,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 20:45:43,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:45:43,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:43,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:45:43,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:43,987 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:45:43,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-08-06 20:45:44,184 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 58.7 percent of original size [2021-08-06 20:45:44,187 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 58.7 percent of original size [2021-08-06 20:45:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:44,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029558248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:44,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:44,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-06 20:45:44,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907644623] [2021-08-06 20:45:44,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:45:44,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:44,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:45:44,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:45:44,300 INFO L87 Difference]: Start difference. First operand 400 states and 889 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) 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) [2021-08-06 20:45:44,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:44,690 INFO L93 Difference]: Finished difference Result 555 states and 1181 transitions. [2021-08-06 20:45:44,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:45:44,690 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) 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 26 [2021-08-06 20:45:44,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:44,692 INFO L225 Difference]: With dead ends: 555 [2021-08-06 20:45:44,692 INFO L226 Difference]: Without dead ends: 550 [2021-08-06 20:45:44,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 417.4ms TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:45:44,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-08-06 20:45:44,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 404. [2021-08-06 20:45:44,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.225806451612903) internal successors, (897), 403 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:44,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 897 transitions. [2021-08-06 20:45:44,697 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 897 transitions. Word has length 26 [2021-08-06 20:45:44,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:44,697 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 897 transitions. [2021-08-06 20:45:44,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) 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) [2021-08-06 20:45:44,698 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 897 transitions. [2021-08-06 20:45:44,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:44,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:44,699 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:44,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:44,909 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 [2021-08-06 20:45:44,910 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:44,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:44,910 INFO L82 PathProgramCache]: Analyzing trace with hash -2095905962, now seen corresponding path program 23 times [2021-08-06 20:45:44,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:44,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92566310] [2021-08-06 20:45:44,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:44,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:45,005 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 66.7 percent of original size [2021-08-06 20:45:45,009 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 66.7 percent of original size [2021-08-06 20:45:45,090 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:45:45,092 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:45:45,108 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:45:45,109 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:45:45,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:45,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:45,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92566310] [2021-08-06 20:45:45,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92566310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:45,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660281582] [2021-08-06 20:45:45,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:45:45,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:45,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:45,124 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) [2021-08-06 20:45:45,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 20:45:46,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:45:46,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:46,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:45:46,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:47,139 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:45:47,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 62 [2021-08-06 20:45:47,265 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 72.7 percent of original size [2021-08-06 20:45:47,269 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 72.7 percent of original size [2021-08-06 20:45:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:47,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660281582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:47,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:47,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 20:45:47,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464277860] [2021-08-06 20:45:47,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:45:47,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:47,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:45:47,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:45:47,393 INFO L87 Difference]: Start difference. First operand 404 states and 897 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-08-06 20:45:47,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:47,830 INFO L93 Difference]: Finished difference Result 544 states and 1163 transitions. [2021-08-06 20:45:47,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:45:47,830 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 26 [2021-08-06 20:45:47,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:47,832 INFO L225 Difference]: With dead ends: 544 [2021-08-06 20:45:47,832 INFO L226 Difference]: Without dead ends: 539 [2021-08-06 20:45:47,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 478.8ms TimeCoverageRelationStatistics Valid=172, Invalid=640, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:45:47,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-08-06 20:45:47,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 408. [2021-08-06 20:45:47,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.2186732186732185) internal successors, (903), 407 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:47,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 903 transitions. [2021-08-06 20:45:47,839 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 903 transitions. Word has length 26 [2021-08-06 20:45:47,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:47,839 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 903 transitions. [2021-08-06 20:45:47,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-08-06 20:45:47,839 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 903 transitions. [2021-08-06 20:45:47,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:47,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:47,840 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:47,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-06 20:45:48,056 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 [2021-08-06 20:45:48,057 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:48,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:48,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1598426410, now seen corresponding path program 24 times [2021-08-06 20:45:48,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:48,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108724242] [2021-08-06 20:45:48,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:48,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:48,143 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 72.3 percent of original size [2021-08-06 20:45:48,149 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 72.3 percent of original size [2021-08-06 20:45:48,308 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 20:45:48,309 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 20:45:48,329 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:45:48,330 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:45:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:48,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:48,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108724242] [2021-08-06 20:45:48,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108724242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:48,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406657682] [2021-08-06 20:45:48,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:45:48,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:48,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:48,349 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) [2021-08-06 20:45:48,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 20:45:49,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:45:49,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:49,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:45:49,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:50,530 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:45:50,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 42 [2021-08-06 20:45:50,864 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:45:50,867 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:45:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:50,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406657682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:50,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:50,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 20:45:50,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273027891] [2021-08-06 20:45:50,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:45:50,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:50,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:45:50,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:45:50,963 INFO L87 Difference]: Start difference. First operand 408 states and 903 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) 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) [2021-08-06 20:45:52,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:52,430 INFO L93 Difference]: Finished difference Result 570 states and 1187 transitions. [2021-08-06 20:45:52,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:45:52,431 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) 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 26 [2021-08-06 20:45:52,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:52,432 INFO L225 Difference]: With dead ends: 570 [2021-08-06 20:45:52,436 INFO L226 Difference]: Without dead ends: 565 [2021-08-06 20:45:52,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1243.6ms TimeCoverageRelationStatistics Valid=227, Invalid=1179, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:45:52,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-08-06 20:45:52,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 410. [2021-08-06 20:45:52,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.2224938875305624) internal successors, (909), 409 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 909 transitions. [2021-08-06 20:45:52,442 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 909 transitions. Word has length 26 [2021-08-06 20:45:52,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:52,442 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 909 transitions. [2021-08-06 20:45:52,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) 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) [2021-08-06 20:45:52,442 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 909 transitions. [2021-08-06 20:45:52,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:52,443 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:52,443 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:52,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-06 20:45:52,643 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 [2021-08-06 20:45:52,644 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:52,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:52,644 INFO L82 PathProgramCache]: Analyzing trace with hash 509143638, now seen corresponding path program 19 times [2021-08-06 20:45:52,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:52,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402865555] [2021-08-06 20:45:52,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:52,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:52,688 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 57.1 percent of original size [2021-08-06 20:45:52,691 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 57.1 percent of original size [2021-08-06 20:45:52,745 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 50.0 percent of original size [2021-08-06 20:45:52,748 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 50.0 percent of original size [2021-08-06 20:45:52,835 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 77.4 percent of original size [2021-08-06 20:45:52,837 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 77.4 percent of original size [2021-08-06 20:45:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:52,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:52,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402865555] [2021-08-06 20:45:52,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402865555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:52,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384408682] [2021-08-06 20:45:52,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:45:52,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:52,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:52,873 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) [2021-08-06 20:45:52,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 20:45:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:54,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:45:54,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:55,161 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 20:45:55,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 23 [2021-08-06 20:45:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:55,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384408682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:55,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:55,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 20:45:55,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874184077] [2021-08-06 20:45:55,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:45:55,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:55,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:45:55,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:45:55,239 INFO L87 Difference]: Start difference. First operand 410 states and 909 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:55,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:55,686 INFO L93 Difference]: Finished difference Result 530 states and 1099 transitions. [2021-08-06 20:45:55,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:45:55,686 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:45:55,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:55,688 INFO L225 Difference]: With dead ends: 530 [2021-08-06 20:45:55,688 INFO L226 Difference]: Without dead ends: 525 [2021-08-06 20:45:55,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 478.0ms TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:45:55,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-08-06 20:45:55,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 417. [2021-08-06 20:45:55,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.21875) internal successors, (923), 416 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:55,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 923 transitions. [2021-08-06 20:45:55,693 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 923 transitions. Word has length 26 [2021-08-06 20:45:55,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:55,693 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 923 transitions. [2021-08-06 20:45:55,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:55,694 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 923 transitions. [2021-08-06 20:45:55,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:55,694 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:55,694 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:55,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-06 20:45:55,894 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 [2021-08-06 20:45:55,895 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:55,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:55,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1063241130, now seen corresponding path program 20 times [2021-08-06 20:45:55,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:55,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383830466] [2021-08-06 20:45:55,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:55,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:55,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:55,940 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 57.1 percent of original size [2021-08-06 20:45:55,942 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 57.1 percent of original size [2021-08-06 20:45:55,989 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 50.0 percent of original size [2021-08-06 20:45:55,991 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 50.0 percent of original size [2021-08-06 20:45:56,065 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 81.1 percent of original size [2021-08-06 20:45:56,068 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 81.1 percent of original size [2021-08-06 20:45:56,091 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 77.4 percent of original size [2021-08-06 20:45:56,092 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 77.4 percent of original size [2021-08-06 20:45:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:56,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:56,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383830466] [2021-08-06 20:45:56,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383830466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:56,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171521016] [2021-08-06 20:45:56,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:45:56,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:56,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:56,114 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) [2021-08-06 20:45:56,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 20:45:57,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:45:57,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:57,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:45:57,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:58,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:45:58,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:45:58,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:45:58,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:45:58,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-08-06 20:45:58,330 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 57.1 percent of original size [2021-08-06 20:45:58,332 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 57.1 percent of original size [2021-08-06 20:45:58,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:58,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171521016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:58,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:58,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-08-06 20:45:58,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679178541] [2021-08-06 20:45:58,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:45:58,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:58,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:45:58,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:45:58,517 INFO L87 Difference]: Start difference. First operand 417 states and 923 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:59,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:59,883 INFO L93 Difference]: Finished difference Result 806 states and 1624 transitions. [2021-08-06 20:45:59,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 20:45:59,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:45:59,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:59,886 INFO L225 Difference]: With dead ends: 806 [2021-08-06 20:45:59,886 INFO L226 Difference]: Without dead ends: 792 [2021-08-06 20:45:59,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1214.5ms TimeCoverageRelationStatistics Valid=416, Invalid=1476, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:45:59,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-08-06 20:45:59,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 434. [2021-08-06 20:45:59,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.2170900692840645) internal successors, (960), 433 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:59,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 960 transitions. [2021-08-06 20:45:59,896 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 960 transitions. Word has length 26 [2021-08-06 20:45:59,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:59,897 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 960 transitions. [2021-08-06 20:45:59,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:59,897 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 960 transitions. [2021-08-06 20:45:59,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:45:59,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:59,898 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:59,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:00,120 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 [2021-08-06 20:46:00,121 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:00,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:00,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1774753178, now seen corresponding path program 25 times [2021-08-06 20:46:00,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:00,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974466881] [2021-08-06 20:46:00,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:00,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:00,207 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 87.0 percent of original size [2021-08-06 20:46:00,213 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 87.0 percent of original size [2021-08-06 20:46:00,285 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 78.0 percent of original size [2021-08-06 20:46:00,287 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 78.0 percent of original size [2021-08-06 20:46:00,326 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:46:00,328 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:46:00,346 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:46:00,347 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:46:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:00,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:00,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974466881] [2021-08-06 20:46:00,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974466881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:00,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526431736] [2021-08-06 20:46:00,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:46:00,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:00,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:00,364 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) [2021-08-06 20:46:00,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 20:46:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:02,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:46:02,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:02,565 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:46:02,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 44 [2021-08-06 20:46:02,671 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 72.7 percent of original size [2021-08-06 20:46:02,674 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 72.7 percent of original size [2021-08-06 20:46:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:02,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526431736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:02,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:02,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 20:46:02,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115085280] [2021-08-06 20:46:02,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:46:02,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:02,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:46:02,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:46:02,780 INFO L87 Difference]: Start difference. First operand 434 states and 960 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-08-06 20:46:03,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:03,495 INFO L93 Difference]: Finished difference Result 620 states and 1306 transitions. [2021-08-06 20:46:03,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:46:03,495 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-08-06 20:46:03,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:03,497 INFO L225 Difference]: With dead ends: 620 [2021-08-06 20:46:03,498 INFO L226 Difference]: Without dead ends: 615 [2021-08-06 20:46:03,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 655.5ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:46:03,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-08-06 20:46:03,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 431. [2021-08-06 20:46:03,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.2093023255813953) internal successors, (950), 430 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:03,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 950 transitions. [2021-08-06 20:46:03,506 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 950 transitions. Word has length 26 [2021-08-06 20:46:03,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:03,506 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 950 transitions. [2021-08-06 20:46:03,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-08-06 20:46:03,506 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 950 transitions. [2021-08-06 20:46:03,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:46:03,507 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:03,507 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:03,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:03,720 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 [2021-08-06 20:46:03,720 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:03,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:03,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1421093350, now seen corresponding path program 21 times [2021-08-06 20:46:03,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:03,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158638149] [2021-08-06 20:46:03,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:03,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:03,763 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 57.1 percent of original size [2021-08-06 20:46:03,766 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 57.1 percent of original size [2021-08-06 20:46:03,817 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 50.0 percent of original size [2021-08-06 20:46:03,821 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 50.0 percent of original size [2021-08-06 20:46:03,848 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 69.6 percent of original size [2021-08-06 20:46:03,854 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 69.6 percent of original size [2021-08-06 20:46:03,917 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 82.9 percent of original size [2021-08-06 20:46:03,920 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 82.9 percent of original size [2021-08-06 20:46:03,943 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 79.3 percent of original size [2021-08-06 20:46:03,945 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 79.3 percent of original size [2021-08-06 20:46:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:03,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:03,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158638149] [2021-08-06 20:46:03,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158638149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:03,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399911010] [2021-08-06 20:46:03,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:46:03,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:03,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:03,967 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) [2021-08-06 20:46:03,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 20:46:05,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:46:05,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:05,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:46:05,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:06,126 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 20:46:06,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 41 [2021-08-06 20:46:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:06,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399911010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:06,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:06,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-06 20:46:06,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30867026] [2021-08-06 20:46:06,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:46:06,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:06,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:46:06,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:46:06,323 INFO L87 Difference]: Start difference. First operand 431 states and 950 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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) [2021-08-06 20:46:07,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:07,366 INFO L93 Difference]: Finished difference Result 641 states and 1347 transitions. [2021-08-06 20:46:07,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:46:07,366 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 26 [2021-08-06 20:46:07,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:07,368 INFO L225 Difference]: With dead ends: 641 [2021-08-06 20:46:07,368 INFO L226 Difference]: Without dead ends: 631 [2021-08-06 20:46:07,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1020.3ms TimeCoverageRelationStatistics Valid=323, Invalid=1237, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:46:07,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-08-06 20:46:07,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 433. [2021-08-06 20:46:07,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.212962962962963) internal successors, (956), 432 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:07,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 956 transitions. [2021-08-06 20:46:07,375 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 956 transitions. Word has length 26 [2021-08-06 20:46:07,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:07,375 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 956 transitions. [2021-08-06 20:46:07,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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) [2021-08-06 20:46:07,376 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 956 transitions. [2021-08-06 20:46:07,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:46:07,376 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:07,376 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:07,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-06 20:46:07,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:07,577 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:07,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:07,577 INFO L82 PathProgramCache]: Analyzing trace with hash -314370918, now seen corresponding path program 26 times [2021-08-06 20:46:07,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:07,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500782430] [2021-08-06 20:46:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:07,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:07,646 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 66.7 percent of original size [2021-08-06 20:46:07,650 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 66.7 percent of original size [2021-08-06 20:46:07,683 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 66.7 percent of original size [2021-08-06 20:46:07,686 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 66.7 percent of original size [2021-08-06 20:46:07,763 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:46:07,765 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:46:07,781 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:46:07,782 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:46:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:07,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:07,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500782430] [2021-08-06 20:46:07,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500782430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:07,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66347237] [2021-08-06 20:46:07,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:46:07,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:07,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:07,796 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) [2021-08-06 20:46:07,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 20:46:09,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:46:09,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:09,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:46:09,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:10,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:46:10,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:46:10,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-08-06 20:46:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:10,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66347237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:10,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:10,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 20:46:10,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413121861] [2021-08-06 20:46:10,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:46:10,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:10,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:46:10,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:46:10,148 INFO L87 Difference]: Start difference. First operand 433 states and 956 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:10,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:10,770 INFO L93 Difference]: Finished difference Result 601 states and 1278 transitions. [2021-08-06 20:46:10,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:46:10,771 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:46:10,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:10,772 INFO L225 Difference]: With dead ends: 601 [2021-08-06 20:46:10,772 INFO L226 Difference]: Without dead ends: 596 [2021-08-06 20:46:10,772 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 528.6ms TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:46:10,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-08-06 20:46:10,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 438. [2021-08-06 20:46:10,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.2242562929061784) internal successors, (972), 437 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:10,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 972 transitions. [2021-08-06 20:46:10,779 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 972 transitions. Word has length 26 [2021-08-06 20:46:10,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:10,779 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 972 transitions. [2021-08-06 20:46:10,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:10,780 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 972 transitions. [2021-08-06 20:46:10,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:46:10,780 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:10,780 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:10,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-06 20:46:10,981 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 [2021-08-06 20:46:10,981 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:10,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:10,981 INFO L82 PathProgramCache]: Analyzing trace with hash -621267686, now seen corresponding path program 22 times [2021-08-06 20:46:10,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:10,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190413954] [2021-08-06 20:46:10,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:10,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:11,034 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 57.1 percent of original size [2021-08-06 20:46:11,038 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 57.1 percent of original size [2021-08-06 20:46:11,125 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 93.0 percent of original size [2021-08-06 20:46:11,127 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 93.0 percent of original size [2021-08-06 20:46:11,181 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 82.9 percent of original size [2021-08-06 20:46:11,184 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 82.9 percent of original size [2021-08-06 20:46:11,210 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 79.3 percent of original size [2021-08-06 20:46:11,212 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 79.3 percent of original size [2021-08-06 20:46:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:11,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:11,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190413954] [2021-08-06 20:46:11,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190413954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:11,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356265127] [2021-08-06 20:46:11,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:46:11,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:11,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:11,236 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) [2021-08-06 20:46:11,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 20:46:13,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:46:13,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:13,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:46:13,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:13,492 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 20:46:13,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 41 [2021-08-06 20:46:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:13,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356265127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:13,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:13,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-06 20:46:13,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667465600] [2021-08-06 20:46:13,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:46:13,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:13,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:46:13,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:46:13,675 INFO L87 Difference]: Start difference. First operand 438 states and 972 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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) [2021-08-06 20:46:14,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:14,310 INFO L93 Difference]: Finished difference Result 614 states and 1295 transitions. [2021-08-06 20:46:14,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:46:14,310 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 26 [2021-08-06 20:46:14,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:14,312 INFO L225 Difference]: With dead ends: 614 [2021-08-06 20:46:14,312 INFO L226 Difference]: Without dead ends: 604 [2021-08-06 20:46:14,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 568.9ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:46:14,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-08-06 20:46:14,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 435. [2021-08-06 20:46:14,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.216589861751152) internal successors, (962), 434 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:14,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 962 transitions. [2021-08-06 20:46:14,322 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 962 transitions. Word has length 26 [2021-08-06 20:46:14,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:14,322 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 962 transitions. [2021-08-06 20:46:14,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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) [2021-08-06 20:46:14,323 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 962 transitions. [2021-08-06 20:46:14,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:14,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:14,323 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:14,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:14,524 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 [2021-08-06 20:46:14,524 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:14,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:14,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1136752764, now seen corresponding path program 27 times [2021-08-06 20:46:14,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:14,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763873482] [2021-08-06 20:46:14,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:14,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:14,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:14,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763873482] [2021-08-06 20:46:14,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763873482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:14,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924319762] [2021-08-06 20:46:14,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:46:14,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:14,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:14,595 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) [2021-08-06 20:46:14,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 20:46:16,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:46:16,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:16,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:46:16,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:16,725 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:16,726 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:16,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924319762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:16,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:16,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 20:46:16,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065312173] [2021-08-06 20:46:16,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:46:16,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:16,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:46:16,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:46:16,749 INFO L87 Difference]: Start difference. First operand 435 states and 962 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:17,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:17,355 INFO L93 Difference]: Finished difference Result 992 states and 1980 transitions. [2021-08-06 20:46:17,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 20:46:17,355 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:17,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:17,357 INFO L225 Difference]: With dead ends: 992 [2021-08-06 20:46:17,357 INFO L226 Difference]: Without dead ends: 992 [2021-08-06 20:46:17,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 433.8ms TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 20:46:17,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-08-06 20:46:17,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 495. [2021-08-06 20:46:17,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 2.2550607287449393) internal successors, (1114), 494 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:17,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1114 transitions. [2021-08-06 20:46:17,365 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1114 transitions. Word has length 28 [2021-08-06 20:46:17,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:17,365 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 1114 transitions. [2021-08-06 20:46:17,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:17,365 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1114 transitions. [2021-08-06 20:46:17,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:17,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:17,366 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:17,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-06 20:46:17,566 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 [2021-08-06 20:46:17,566 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:17,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:17,567 INFO L82 PathProgramCache]: Analyzing trace with hash -354742148, now seen corresponding path program 28 times [2021-08-06 20:46:17,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:17,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721320456] [2021-08-06 20:46:17,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:17,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:17,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:17,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721320456] [2021-08-06 20:46:17,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721320456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:17,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453621836] [2021-08-06 20:46:17,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:46:17,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:17,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:17,645 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) [2021-08-06 20:46:17,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 20:46:19,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:46:19,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:19,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:46:19,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:19,952 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:19,952 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:19,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:19,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453621836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:19,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:19,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 20:46:19,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711966425] [2021-08-06 20:46:19,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:46:19,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:19,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:46:19,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:46:19,975 INFO L87 Difference]: Start difference. First operand 495 states and 1114 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:20,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:20,805 INFO L93 Difference]: Finished difference Result 1142 states and 2221 transitions. [2021-08-06 20:46:20,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 20:46:20,805 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:20,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:20,807 INFO L225 Difference]: With dead ends: 1142 [2021-08-06 20:46:20,807 INFO L226 Difference]: Without dead ends: 1142 [2021-08-06 20:46:20,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 610.9ms TimeCoverageRelationStatistics Valid=826, Invalid=3206, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 20:46:20,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-08-06 20:46:20,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 497. [2021-08-06 20:46:20,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.2419354838709675) internal successors, (1112), 496 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:20,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1112 transitions. [2021-08-06 20:46:20,816 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1112 transitions. Word has length 28 [2021-08-06 20:46:20,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:20,816 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1112 transitions. [2021-08-06 20:46:20,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:20,816 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1112 transitions. [2021-08-06 20:46:20,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:20,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:20,817 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:20,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-06 20:46:21,017 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 [2021-08-06 20:46:21,017 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:21,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:21,017 INFO L82 PathProgramCache]: Analyzing trace with hash -712994820, now seen corresponding path program 23 times [2021-08-06 20:46:21,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:21,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432841999] [2021-08-06 20:46:21,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:21,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:21,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:21,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432841999] [2021-08-06 20:46:21,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432841999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:21,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498119081] [2021-08-06 20:46:21,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:46:21,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:21,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:21,087 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) [2021-08-06 20:46:21,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 20:46:23,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:46:23,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:23,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:46:23,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:23,302 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:23,302 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:23,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498119081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:23,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:23,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-06 20:46:23,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037704203] [2021-08-06 20:46:23,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:46:23,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:23,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:46:23,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:46:23,325 INFO L87 Difference]: Start difference. First operand 497 states and 1112 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:23,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:23,713 INFO L93 Difference]: Finished difference Result 873 states and 1765 transitions. [2021-08-06 20:46:23,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 20:46:23,713 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:23,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:23,715 INFO L225 Difference]: With dead ends: 873 [2021-08-06 20:46:23,715 INFO L226 Difference]: Without dead ends: 873 [2021-08-06 20:46:23,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 300.5ms TimeCoverageRelationStatistics Valid=310, Invalid=1096, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:46:23,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-08-06 20:46:23,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 495. [2021-08-06 20:46:23,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 2.2388663967611335) internal successors, (1106), 494 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:23,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1106 transitions. [2021-08-06 20:46:23,722 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1106 transitions. Word has length 28 [2021-08-06 20:46:23,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:23,722 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 1106 transitions. [2021-08-06 20:46:23,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:23,722 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1106 transitions. [2021-08-06 20:46:23,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:23,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:23,723 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:23,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-06 20:46:23,923 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 [2021-08-06 20:46:23,923 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:23,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:23,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1576605688, now seen corresponding path program 29 times [2021-08-06 20:46:23,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:23,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248780557] [2021-08-06 20:46:23,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:23,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:46:23,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:23,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248780557] [2021-08-06 20:46:23,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248780557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:23,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658274622] [2021-08-06 20:46:23,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:46:23,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:23,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:23,975 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) [2021-08-06 20:46:23,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 20:46:26,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:46:26,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:26,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:46:26,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:26,145 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:26,146 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:26,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:46:26,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658274622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:26,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:26,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 20:46:26,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921911249] [2021-08-06 20:46:26,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:46:26,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:26,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:46:26,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:46:26,189 INFO L87 Difference]: Start difference. First operand 495 states and 1106 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:26,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:26,291 INFO L93 Difference]: Finished difference Result 819 states and 1734 transitions. [2021-08-06 20:46:26,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:46:26,291 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:26,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:26,293 INFO L225 Difference]: With dead ends: 819 [2021-08-06 20:46:26,293 INFO L226 Difference]: Without dead ends: 819 [2021-08-06 20:46:26,293 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:46:26,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-08-06 20:46:26,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 692. [2021-08-06 20:46:26,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 2.247467438494935) internal successors, (1553), 691 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:26,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1553 transitions. [2021-08-06 20:46:26,301 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1553 transitions. Word has length 28 [2021-08-06 20:46:26,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:26,301 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 1553 transitions. [2021-08-06 20:46:26,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:26,301 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1553 transitions. [2021-08-06 20:46:26,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:26,302 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:26,302 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:26,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-06 20:46:26,502 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 [2021-08-06 20:46:26,503 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:26,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:26,503 INFO L82 PathProgramCache]: Analyzing trace with hash -273141896, now seen corresponding path program 30 times [2021-08-06 20:46:26,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:26,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075107774] [2021-08-06 20:46:26,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:26,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:26,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:26,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075107774] [2021-08-06 20:46:26,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075107774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:26,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939728649] [2021-08-06 20:46:26,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:46:26,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:26,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:26,576 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) [2021-08-06 20:46:26,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 20:46:28,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:46:28,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:28,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:28,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:28,881 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:28,881 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:28,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939728649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:28,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:28,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 20:46:28,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122903584] [2021-08-06 20:46:28,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:46:28,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:28,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:46:28,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:46:28,911 INFO L87 Difference]: Start difference. First operand 692 states and 1553 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:29,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:29,250 INFO L93 Difference]: Finished difference Result 1017 states and 2067 transitions. [2021-08-06 20:46:29,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:46:29,251 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:29,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:29,252 INFO L225 Difference]: With dead ends: 1017 [2021-08-06 20:46:29,252 INFO L226 Difference]: Without dead ends: 999 [2021-08-06 20:46:29,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 235.7ms TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:46:29,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-08-06 20:46:29,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 761. [2021-08-06 20:46:29,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 2.25) internal successors, (1710), 760 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:29,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1710 transitions. [2021-08-06 20:46:29,266 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1710 transitions. Word has length 28 [2021-08-06 20:46:29,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:29,266 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 1710 transitions. [2021-08-06 20:46:29,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:29,266 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1710 transitions. [2021-08-06 20:46:29,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:29,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:29,268 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:29,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-06 20:46:29,472 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 [2021-08-06 20:46:29,473 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:29,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:29,473 INFO L82 PathProgramCache]: Analyzing trace with hash 235890424, now seen corresponding path program 24 times [2021-08-06 20:46:29,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:29,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193717542] [2021-08-06 20:46:29,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:29,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:29,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:29,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193717542] [2021-08-06 20:46:29,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193717542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:29,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213650996] [2021-08-06 20:46:29,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:46:29,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:29,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:29,548 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) [2021-08-06 20:46:29,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 20:46:31,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:46:31,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:31,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:46:31,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:31,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213650996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:31,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:31,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 20:46:31,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406568446] [2021-08-06 20:46:31,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:46:31,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:31,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:46:31,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:46:31,802 INFO L87 Difference]: Start difference. First operand 761 states and 1710 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:32,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:32,116 INFO L93 Difference]: Finished difference Result 1519 states and 3049 transitions. [2021-08-06 20:46:32,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:46:32,116 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:32,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:32,119 INFO L225 Difference]: With dead ends: 1519 [2021-08-06 20:46:32,119 INFO L226 Difference]: Without dead ends: 1493 [2021-08-06 20:46:32,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 290.6ms TimeCoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:46:32,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-08-06 20:46:32,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 991. [2021-08-06 20:46:32,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 2.271717171717172) internal successors, (2249), 990 states have internal predecessors, (2249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:32,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 2249 transitions. [2021-08-06 20:46:32,152 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 2249 transitions. Word has length 28 [2021-08-06 20:46:32,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:32,152 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 2249 transitions. [2021-08-06 20:46:32,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:32,152 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 2249 transitions. [2021-08-06 20:46:32,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:32,154 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:32,154 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:32,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:32,368 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 [2021-08-06 20:46:32,369 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:32,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:32,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1289611128, now seen corresponding path program 31 times [2021-08-06 20:46:32,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:32,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307187246] [2021-08-06 20:46:32,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:32,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:32,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:32,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307187246] [2021-08-06 20:46:32,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307187246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:32,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440394932] [2021-08-06 20:46:32,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:46:32,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:32,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:32,440 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) [2021-08-06 20:46:32,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 20:46:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:34,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:34,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:34,792 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:34,793 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:34,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:34,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440394932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:34,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:34,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 20:46:34,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371843263] [2021-08-06 20:46:34,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:46:34,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:34,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:46:34,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:46:34,822 INFO L87 Difference]: Start difference. First operand 991 states and 2249 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:35,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:35,192 INFO L93 Difference]: Finished difference Result 1407 states and 2828 transitions. [2021-08-06 20:46:35,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:46:35,193 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:35,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:35,195 INFO L225 Difference]: With dead ends: 1407 [2021-08-06 20:46:35,195 INFO L226 Difference]: Without dead ends: 1395 [2021-08-06 20:46:35,195 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 292.0ms TimeCoverageRelationStatistics Valid=334, Invalid=788, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:46:35,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-08-06 20:46:35,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1003. [2021-08-06 20:46:35,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 2.2784431137724552) internal successors, (2283), 1002 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:35,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 2283 transitions. [2021-08-06 20:46:35,210 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 2283 transitions. Word has length 28 [2021-08-06 20:46:35,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:35,210 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 2283 transitions. [2021-08-06 20:46:35,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:35,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 2283 transitions. [2021-08-06 20:46:35,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:35,211 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:35,212 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:35,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:35,423 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 [2021-08-06 20:46:35,424 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:35,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:35,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1475240072, now seen corresponding path program 32 times [2021-08-06 20:46:35,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:35,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985022176] [2021-08-06 20:46:35,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:35,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:35,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:35,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985022176] [2021-08-06 20:46:35,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985022176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:35,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828978922] [2021-08-06 20:46:35,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:46:35,493 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:35,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:35,494 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) [2021-08-06 20:46:35,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 20:46:37,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:46:37,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:37,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:37,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:37,683 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:37,683 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:37,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828978922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:37,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:37,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 20:46:37,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631383225] [2021-08-06 20:46:37,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:46:37,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:37,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:46:37,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:46:37,720 INFO L87 Difference]: Start difference. First operand 1003 states and 2283 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:38,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:38,121 INFO L93 Difference]: Finished difference Result 1371 states and 2788 transitions. [2021-08-06 20:46:38,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:46:38,121 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:38,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:38,123 INFO L225 Difference]: With dead ends: 1371 [2021-08-06 20:46:38,123 INFO L226 Difference]: Without dead ends: 1357 [2021-08-06 20:46:38,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 313.9ms TimeCoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:46:38,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2021-08-06 20:46:38,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 987. [2021-08-06 20:46:38,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 2.288032454361055) internal successors, (2256), 986 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:38,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 2256 transitions. [2021-08-06 20:46:38,137 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 2256 transitions. Word has length 28 [2021-08-06 20:46:38,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:38,137 INFO L470 AbstractCegarLoop]: Abstraction has 987 states and 2256 transitions. [2021-08-06 20:46:38,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:38,138 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 2256 transitions. [2021-08-06 20:46:38,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:38,139 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:38,139 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:38,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-06 20:46:38,339 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 [2021-08-06 20:46:38,339 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:38,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:38,340 INFO L82 PathProgramCache]: Analyzing trace with hash -750794888, now seen corresponding path program 33 times [2021-08-06 20:46:38,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:38,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463924935] [2021-08-06 20:46:38,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:38,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:38,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:38,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463924935] [2021-08-06 20:46:38,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463924935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:38,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067577021] [2021-08-06 20:46:38,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:46:38,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:38,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:38,405 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) [2021-08-06 20:46:38,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 20:46:40,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:46:40,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:40,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:40,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:40,581 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:40,581 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:40,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067577021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:40,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:40,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:46:40,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014024572] [2021-08-06 20:46:40,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:46:40,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:40,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:46:40,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:46:40,611 INFO L87 Difference]: Start difference. First operand 987 states and 2256 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:40,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:40,921 INFO L93 Difference]: Finished difference Result 1466 states and 2967 transitions. [2021-08-06 20:46:40,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:46:40,921 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:40,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:40,924 INFO L225 Difference]: With dead ends: 1466 [2021-08-06 20:46:40,924 INFO L226 Difference]: Without dead ends: 1454 [2021-08-06 20:46:40,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:46:40,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-08-06 20:46:40,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 995. [2021-08-06 20:46:40,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 2.2967806841046277) internal successors, (2283), 994 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 2283 transitions. [2021-08-06 20:46:40,945 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 2283 transitions. Word has length 28 [2021-08-06 20:46:40,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:40,946 INFO L470 AbstractCegarLoop]: Abstraction has 995 states and 2283 transitions. [2021-08-06 20:46:40,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:40,946 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 2283 transitions. [2021-08-06 20:46:40,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:40,947 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:40,948 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:40,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:41,173 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 [2021-08-06 20:46:41,173 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:41,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:41,173 INFO L82 PathProgramCache]: Analyzing trace with hash 302925816, now seen corresponding path program 34 times [2021-08-06 20:46:41,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:41,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826050148] [2021-08-06 20:46:41,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:41,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:46:41,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:41,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826050148] [2021-08-06 20:46:41,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826050148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:41,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697379290] [2021-08-06 20:46:41,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:46:41,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:41,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:41,226 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) [2021-08-06 20:46:41,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 20:46:43,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:46:43,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:43,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:46:43,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:43,598 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:43,599 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:46:43,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697379290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:43,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:43,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 20:46:43,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762438750] [2021-08-06 20:46:43,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:46:43,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:43,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:46:43,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:46:43,642 INFO L87 Difference]: Start difference. First operand 995 states and 2283 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:43,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:43,733 INFO L93 Difference]: Finished difference Result 1136 states and 2473 transitions. [2021-08-06 20:46:43,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:46:43,733 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:43,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:43,735 INFO L225 Difference]: With dead ends: 1136 [2021-08-06 20:46:43,736 INFO L226 Difference]: Without dead ends: 1136 [2021-08-06 20:46:43,736 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:46:43,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-08-06 20:46:43,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 922. [2021-08-06 20:46:43,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.2953311617806733) internal successors, (2114), 921 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:43,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2114 transitions. [2021-08-06 20:46:43,752 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2114 transitions. Word has length 28 [2021-08-06 20:46:43,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:43,752 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 2114 transitions. [2021-08-06 20:46:43,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:43,752 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2114 transitions. [2021-08-06 20:46:43,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:43,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:43,754 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:43,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:43,968 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 [2021-08-06 20:46:43,969 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:43,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:43,969 INFO L82 PathProgramCache]: Analyzing trace with hash -241891208, now seen corresponding path program 35 times [2021-08-06 20:46:43,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:43,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206874683] [2021-08-06 20:46:43,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:43,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:44,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:44,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206874683] [2021-08-06 20:46:44,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206874683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:44,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611178955] [2021-08-06 20:46:44,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:46:44,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:44,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:44,029 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) [2021-08-06 20:46:44,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 20:46:46,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:46:46,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:46,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:46:46,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:46,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:46,311 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:46,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611178955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:46,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:46,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 20:46:46,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166858748] [2021-08-06 20:46:46,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:46:46,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:46,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:46:46,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:46:46,334 INFO L87 Difference]: Start difference. First operand 922 states and 2114 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:47,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:47,068 INFO L93 Difference]: Finished difference Result 2880 states and 5780 transitions. [2021-08-06 20:46:47,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 20:46:47,068 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:47,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:47,074 INFO L225 Difference]: With dead ends: 2880 [2021-08-06 20:46:47,074 INFO L226 Difference]: Without dead ends: 2880 [2021-08-06 20:46:47,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 554.5ms TimeCoverageRelationStatistics Valid=827, Invalid=2955, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 20:46:47,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2021-08-06 20:46:47,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 863. [2021-08-06 20:46:47,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 2.2679814385150814) internal successors, (1955), 862 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:47,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1955 transitions. [2021-08-06 20:46:47,099 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1955 transitions. Word has length 28 [2021-08-06 20:46:47,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:47,099 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1955 transitions. [2021-08-06 20:46:47,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:47,099 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1955 transitions. [2021-08-06 20:46:47,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:47,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:47,101 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:47,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:47,329 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 [2021-08-06 20:46:47,329 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:47,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:47,330 INFO L82 PathProgramCache]: Analyzing trace with hash 15931256, now seen corresponding path program 36 times [2021-08-06 20:46:47,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:47,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137376594] [2021-08-06 20:46:47,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:47,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:47,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:47,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137376594] [2021-08-06 20:46:47,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137376594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:47,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306301682] [2021-08-06 20:46:47,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:46:47,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:47,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:47,396 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) [2021-08-06 20:46:47,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 20:46:49,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:46:49,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:49,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:49,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:49,615 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:49,616 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:49,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306301682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:49,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:49,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:46:49,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152457702] [2021-08-06 20:46:49,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:46:49,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:49,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:46:49,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:46:49,645 INFO L87 Difference]: Start difference. First operand 863 states and 1955 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:49,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:49,986 INFO L93 Difference]: Finished difference Result 1387 states and 2813 transitions. [2021-08-06 20:46:49,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:46:49,986 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:49,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:49,988 INFO L225 Difference]: With dead ends: 1387 [2021-08-06 20:46:49,988 INFO L226 Difference]: Without dead ends: 1383 [2021-08-06 20:46:49,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 250.9ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:46:49,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2021-08-06 20:46:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 928. [2021-08-06 20:46:50,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 2.2998921251348436) internal successors, (2132), 927 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:50,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 2132 transitions. [2021-08-06 20:46:50,008 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 2132 transitions. Word has length 28 [2021-08-06 20:46:50,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:50,008 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 2132 transitions. [2021-08-06 20:46:50,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:50,008 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 2132 transitions. [2021-08-06 20:46:50,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:50,010 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:50,010 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:50,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:50,237 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 [2021-08-06 20:46:50,237 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:50,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:50,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1556453512, now seen corresponding path program 37 times [2021-08-06 20:46:50,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:50,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088782375] [2021-08-06 20:46:50,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:50,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:50,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:50,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088782375] [2021-08-06 20:46:50,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088782375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:50,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688565161] [2021-08-06 20:46:50,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:46:50,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:50,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:50,345 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) [2021-08-06 20:46:50,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 20:46:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:52,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:52,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:52,669 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:52,670 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:52,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688565161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:52,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:52,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:46:52,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439539651] [2021-08-06 20:46:52,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:46:52,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:52,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:46:52,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:46:52,706 INFO L87 Difference]: Start difference. First operand 928 states and 2132 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:53,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:53,139 INFO L93 Difference]: Finished difference Result 1409 states and 2865 transitions. [2021-08-06 20:46:53,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:46:53,139 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:53,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:53,141 INFO L225 Difference]: With dead ends: 1409 [2021-08-06 20:46:53,141 INFO L226 Difference]: Without dead ends: 1409 [2021-08-06 20:46:53,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 330.8ms TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:46:53,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2021-08-06 20:46:53,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 868. [2021-08-06 20:46:53,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 2.281430219146482) internal successors, (1978), 867 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:53,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1978 transitions. [2021-08-06 20:46:53,156 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1978 transitions. Word has length 28 [2021-08-06 20:46:53,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:53,156 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1978 transitions. [2021-08-06 20:46:53,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:53,156 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1978 transitions. [2021-08-06 20:46:53,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:53,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:53,158 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:53,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:53,376 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 [2021-08-06 20:46:53,377 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:53,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:53,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1279463288, now seen corresponding path program 38 times [2021-08-06 20:46:53,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:53,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088549919] [2021-08-06 20:46:53,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:53,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:53,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:53,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088549919] [2021-08-06 20:46:53,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088549919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:53,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709861098] [2021-08-06 20:46:53,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:46:53,439 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:53,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:53,440 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) [2021-08-06 20:46:53,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 20:46:55,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:46:55,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:55,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:55,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:55,732 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:55,732 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:46:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:55,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709861098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:55,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:55,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:46:55,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755949597] [2021-08-06 20:46:55,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:46:55,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:55,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:46:55,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:46:55,775 INFO L87 Difference]: Start difference. First operand 868 states and 1978 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:56,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:56,262 INFO L93 Difference]: Finished difference Result 1423 states and 2944 transitions. [2021-08-06 20:46:56,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:46:56,262 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:56,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:56,264 INFO L225 Difference]: With dead ends: 1423 [2021-08-06 20:46:56,264 INFO L226 Difference]: Without dead ends: 1421 [2021-08-06 20:46:56,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 317.9ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:46:56,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-08-06 20:46:56,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 999. [2021-08-06 20:46:56,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 998 states have (on average 2.284569138276553) internal successors, (2280), 998 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:56,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 2280 transitions. [2021-08-06 20:46:56,278 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 2280 transitions. Word has length 28 [2021-08-06 20:46:56,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:56,278 INFO L470 AbstractCegarLoop]: Abstraction has 999 states and 2280 transitions. [2021-08-06 20:46:56,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:56,278 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 2280 transitions. [2021-08-06 20:46:56,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:56,280 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:56,280 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:56,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-06 20:46:56,480 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 [2021-08-06 20:46:56,480 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:56,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:56,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1823037576, now seen corresponding path program 39 times [2021-08-06 20:46:56,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:56,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248063248] [2021-08-06 20:46:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:56,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:56,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:56,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248063248] [2021-08-06 20:46:56,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248063248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:56,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251369389] [2021-08-06 20:46:56,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:46:56,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:56,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:56,536 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) [2021-08-06 20:46:56,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 20:46:58,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:46:58,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:58,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:46:58,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:58,813 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:58,814 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:46:58,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:58,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251369389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:58,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:58,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:46:58,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366925818] [2021-08-06 20:46:58,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:46:58,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:58,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:46:58,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:46:58,851 INFO L87 Difference]: Start difference. First operand 999 states and 2280 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:59,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:59,490 INFO L93 Difference]: Finished difference Result 1471 states and 3036 transitions. [2021-08-06 20:46:59,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 20:46:59,490 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:46:59,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:59,492 INFO L225 Difference]: With dead ends: 1471 [2021-08-06 20:46:59,492 INFO L226 Difference]: Without dead ends: 1471 [2021-08-06 20:46:59,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 437.8ms TimeCoverageRelationStatistics Valid=597, Invalid=1565, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 20:46:59,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2021-08-06 20:46:59,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 997. [2021-08-06 20:46:59,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 2.282128514056225) internal successors, (2273), 996 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:59,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 2273 transitions. [2021-08-06 20:46:59,510 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 2273 transitions. Word has length 28 [2021-08-06 20:46:59,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:59,511 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 2273 transitions. [2021-08-06 20:46:59,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:59,511 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 2273 transitions. [2021-08-06 20:46:59,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:46:59,513 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:59,513 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:59,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:59,736 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 [2021-08-06 20:46:59,737 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:59,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:59,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1814648568, now seen corresponding path program 25 times [2021-08-06 20:46:59,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:59,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057186413] [2021-08-06 20:46:59,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:59,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:59,804 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:59,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:59,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057186413] [2021-08-06 20:46:59,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057186413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:59,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57496774] [2021-08-06 20:46:59,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:46:59,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:59,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:59,816 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) [2021-08-06 20:46:59,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 20:47:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:01,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:47:01,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:02,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57496774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:02,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:02,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-06 20:47:02,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551503513] [2021-08-06 20:47:02,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:47:02,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:02,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:47:02,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:47:02,179 INFO L87 Difference]: Start difference. First operand 997 states and 2273 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:02,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:02,644 INFO L93 Difference]: Finished difference Result 2015 states and 4320 transitions. [2021-08-06 20:47:02,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:47:02,644 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:02,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:02,647 INFO L225 Difference]: With dead ends: 2015 [2021-08-06 20:47:02,647 INFO L226 Difference]: Without dead ends: 2015 [2021-08-06 20:47:02,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 359.8ms TimeCoverageRelationStatistics Valid=508, Invalid=1214, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:47:02,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2021-08-06 20:47:02,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1471. [2021-08-06 20:47:02,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 2.321768707482993) internal successors, (3413), 1470 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:02,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 3413 transitions. [2021-08-06 20:47:02,669 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 3413 transitions. Word has length 28 [2021-08-06 20:47:02,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:02,669 INFO L470 AbstractCegarLoop]: Abstraction has 1471 states and 3413 transitions. [2021-08-06 20:47:02,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 3413 transitions. [2021-08-06 20:47:02,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:02,672 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:02,672 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:02,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-06 20:47:02,896 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 [2021-08-06 20:47:02,897 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:02,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:02,897 INFO L82 PathProgramCache]: Analyzing trace with hash 205561912, now seen corresponding path program 40 times [2021-08-06 20:47:02,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:02,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038054779] [2021-08-06 20:47:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:02,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:02,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:02,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038054779] [2021-08-06 20:47:02,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038054779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:02,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127417251] [2021-08-06 20:47:02,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:47:02,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:02,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:02,958 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) [2021-08-06 20:47:03,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 20:47:05,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:47:05,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:05,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:47:05,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:05,266 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:47:05,267 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:47:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:05,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127417251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:05,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:05,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 20:47:05,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404286995] [2021-08-06 20:47:05,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:47:05,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:05,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:47:05,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:47:05,296 INFO L87 Difference]: Start difference. First operand 1471 states and 3413 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:05,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:05,498 INFO L93 Difference]: Finished difference Result 2323 states and 5144 transitions. [2021-08-06 20:47:05,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:47:05,498 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:05,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:05,501 INFO L225 Difference]: With dead ends: 2323 [2021-08-06 20:47:05,501 INFO L226 Difference]: Without dead ends: 2311 [2021-08-06 20:47:05,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:47:05,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2021-08-06 20:47:05,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 1864. [2021-08-06 20:47:05,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1863 states have (on average 2.3317230273752014) internal successors, (4344), 1863 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:05,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 4344 transitions. [2021-08-06 20:47:05,522 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 4344 transitions. Word has length 28 [2021-08-06 20:47:05,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:05,522 INFO L470 AbstractCegarLoop]: Abstraction has 1864 states and 4344 transitions. [2021-08-06 20:47:05,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:05,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 4344 transitions. [2021-08-06 20:47:05,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:05,525 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:05,525 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:05,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-06 20:47:05,725 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 [2021-08-06 20:47:05,725 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:05,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:05,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1005529464, now seen corresponding path program 41 times [2021-08-06 20:47:05,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:05,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441921777] [2021-08-06 20:47:05,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:05,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:47:05,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:05,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441921777] [2021-08-06 20:47:05,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441921777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:05,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404513908] [2021-08-06 20:47:05,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:47:05,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:05,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:05,789 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) [2021-08-06 20:47:05,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 20:47:07,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:47:07,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:07,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:47:07,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:08,080 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:08,080 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:47:08,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404513908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:08,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:08,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-06 20:47:08,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256423226] [2021-08-06 20:47:08,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:47:08,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:08,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:47:08,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:47:08,123 INFO L87 Difference]: Start difference. First operand 1864 states and 4344 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:08,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:08,239 INFO L93 Difference]: Finished difference Result 2015 states and 4629 transitions. [2021-08-06 20:47:08,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:47:08,240 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:08,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:08,242 INFO L225 Difference]: With dead ends: 2015 [2021-08-06 20:47:08,242 INFO L226 Difference]: Without dead ends: 2015 [2021-08-06 20:47:08,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:47:08,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2021-08-06 20:47:08,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1958. [2021-08-06 20:47:08,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1957 states have (on average 2.3188553909044454) internal successors, (4538), 1957 states have internal predecessors, (4538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:08,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 4538 transitions. [2021-08-06 20:47:08,262 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 4538 transitions. Word has length 28 [2021-08-06 20:47:08,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:08,262 INFO L470 AbstractCegarLoop]: Abstraction has 1958 states and 4538 transitions. [2021-08-06 20:47:08,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:08,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 4538 transitions. [2021-08-06 20:47:08,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:08,264 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:08,264 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:08,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-06 20:47:08,465 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 [2021-08-06 20:47:08,465 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:08,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:08,465 INFO L82 PathProgramCache]: Analyzing trace with hash -717941764, now seen corresponding path program 42 times [2021-08-06 20:47:08,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:08,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77712732] [2021-08-06 20:47:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:08,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:08,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:08,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77712732] [2021-08-06 20:47:08,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77712732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:08,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953178424] [2021-08-06 20:47:08,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:47:08,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:08,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:08,521 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) [2021-08-06 20:47:08,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 20:47:10,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:47:10,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:10,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:47:10,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:10,814 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:47:10,815 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:47:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:10,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953178424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:10,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:10,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 20:47:10,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171257546] [2021-08-06 20:47:10,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:47:10,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:10,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:47:10,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:47:10,844 INFO L87 Difference]: Start difference. First operand 1958 states and 4538 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:11,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:11,037 INFO L93 Difference]: Finished difference Result 2411 states and 5417 transitions. [2021-08-06 20:47:11,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:47:11,038 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:11,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:11,040 INFO L225 Difference]: With dead ends: 2411 [2021-08-06 20:47:11,040 INFO L226 Difference]: Without dead ends: 2405 [2021-08-06 20:47:11,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:47:11,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-08-06 20:47:11,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 2235. [2021-08-06 20:47:11,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2235 states, 2234 states have (on average 2.3294538943598924) internal successors, (5204), 2234 states have internal predecessors, (5204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:11,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 5204 transitions. [2021-08-06 20:47:11,064 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 5204 transitions. Word has length 28 [2021-08-06 20:47:11,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:11,064 INFO L470 AbstractCegarLoop]: Abstraction has 2235 states and 5204 transitions. [2021-08-06 20:47:11,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:11,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 5204 transitions. [2021-08-06 20:47:11,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:11,067 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:11,067 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:11,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-06 20:47:11,267 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 [2021-08-06 20:47:11,267 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:11,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:11,268 INFO L82 PathProgramCache]: Analyzing trace with hash 2004640764, now seen corresponding path program 43 times [2021-08-06 20:47:11,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:11,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303430491] [2021-08-06 20:47:11,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:11,268 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:47:11,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:11,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303430491] [2021-08-06 20:47:11,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303430491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:11,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703251729] [2021-08-06 20:47:11,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:47:11,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:11,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:11,326 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) [2021-08-06 20:47:11,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 20:47:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:13,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:47:13,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:13,652 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:13,653 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:47:13,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703251729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:13,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:13,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 20:47:13,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813092930] [2021-08-06 20:47:13,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:47:13,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:13,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:47:13,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:47:13,689 INFO L87 Difference]: Start difference. First operand 2235 states and 5204 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:13,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:13,941 INFO L93 Difference]: Finished difference Result 2376 states and 5378 transitions. [2021-08-06 20:47:13,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:47:13,942 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:13,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:13,944 INFO L225 Difference]: With dead ends: 2376 [2021-08-06 20:47:13,944 INFO L226 Difference]: Without dead ends: 2376 [2021-08-06 20:47:13,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 156.8ms TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:47:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-08-06 20:47:13,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2195. [2021-08-06 20:47:13,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 2.331358249772106) internal successors, (5115), 2194 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:13,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 5115 transitions. [2021-08-06 20:47:13,967 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 5115 transitions. Word has length 28 [2021-08-06 20:47:13,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:13,967 INFO L470 AbstractCegarLoop]: Abstraction has 2195 states and 5115 transitions. [2021-08-06 20:47:13,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:13,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 5115 transitions. [2021-08-06 20:47:13,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:13,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:13,970 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:13,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-06 20:47:14,170 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 [2021-08-06 20:47:14,171 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:14,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:14,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1646788544, now seen corresponding path program 44 times [2021-08-06 20:47:14,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:14,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319520405] [2021-08-06 20:47:14,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:14,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:14,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:14,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319520405] [2021-08-06 20:47:14,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319520405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:14,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144009725] [2021-08-06 20:47:14,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:47:14,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:14,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:14,230 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) [2021-08-06 20:47:14,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 20:47:16,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:47:16,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:16,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:47:16,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:16,535 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:16,536 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:16,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:16,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144009725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:16,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:16,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 20:47:16,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260269580] [2021-08-06 20:47:16,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:47:16,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:16,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:47:16,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:47:16,572 INFO L87 Difference]: Start difference. First operand 2195 states and 5115 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:16,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:16,874 INFO L93 Difference]: Finished difference Result 2488 states and 5697 transitions. [2021-08-06 20:47:16,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:47:16,875 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:16,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:16,877 INFO L225 Difference]: With dead ends: 2488 [2021-08-06 20:47:16,878 INFO L226 Difference]: Without dead ends: 2488 [2021-08-06 20:47:16,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 195.6ms TimeCoverageRelationStatistics Valid=258, Invalid=612, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:47:16,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-08-06 20:47:16,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2271. [2021-08-06 20:47:16,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 2270 states have (on average 2.3185022026431716) internal successors, (5263), 2270 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) [2021-08-06 20:47:16,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 5263 transitions. [2021-08-06 20:47:16,902 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 5263 transitions. Word has length 28 [2021-08-06 20:47:16,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:16,902 INFO L470 AbstractCegarLoop]: Abstraction has 2271 states and 5263 transitions. [2021-08-06 20:47:16,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:16,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 5263 transitions. [2021-08-06 20:47:16,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:16,904 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:16,904 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:16,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-06 20:47:17,105 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 [2021-08-06 20:47:17,105 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:17,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:17,105 INFO L82 PathProgramCache]: Analyzing trace with hash -527973576, now seen corresponding path program 45 times [2021-08-06 20:47:17,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:17,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518852029] [2021-08-06 20:47:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:17,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:47:17,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:17,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518852029] [2021-08-06 20:47:17,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518852029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:17,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225124883] [2021-08-06 20:47:17,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:47:17,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:17,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:17,175 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) [2021-08-06 20:47:17,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 20:47:19,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:47:19,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:19,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:47:19,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:19,605 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:19,606 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:19,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225124883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:19,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:19,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 20:47:19,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570663336] [2021-08-06 20:47:19,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:47:19,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:19,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:47:19,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:47:19,628 INFO L87 Difference]: Start difference. First operand 2271 states and 5263 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:20,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:20,332 INFO L93 Difference]: Finished difference Result 4640 states and 9814 transitions. [2021-08-06 20:47:20,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 20:47:20,333 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:20,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:20,339 INFO L225 Difference]: With dead ends: 4640 [2021-08-06 20:47:20,339 INFO L226 Difference]: Without dead ends: 4640 [2021-08-06 20:47:20,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 507.9ms TimeCoverageRelationStatistics Valid=723, Invalid=2357, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 20:47:20,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4640 states. [2021-08-06 20:47:20,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4640 to 2341. [2021-08-06 20:47:20,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2341 states, 2340 states have (on average 2.3205128205128207) internal successors, (5430), 2340 states have internal predecessors, (5430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2341 states to 2341 states and 5430 transitions. [2021-08-06 20:47:20,380 INFO L78 Accepts]: Start accepts. Automaton has 2341 states and 5430 transitions. Word has length 28 [2021-08-06 20:47:20,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:20,380 INFO L470 AbstractCegarLoop]: Abstraction has 2341 states and 5430 transitions. [2021-08-06 20:47:20,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:20,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2341 states and 5430 transitions. [2021-08-06 20:47:20,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:20,383 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:20,383 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:20,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-06 20:47:20,584 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 [2021-08-06 20:47:20,584 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:20,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:20,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1579596472, now seen corresponding path program 26 times [2021-08-06 20:47:20,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:20,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100639112] [2021-08-06 20:47:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:20,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:47:20,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:20,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100639112] [2021-08-06 20:47:20,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100639112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:20,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107209811] [2021-08-06 20:47:20,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:47:20,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:20,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:20,656 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) [2021-08-06 20:47:20,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 20:47:22,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:47:22,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:22,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:47:22,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:23,090 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:23,090 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:23,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107209811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:23,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:23,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-08-06 20:47:23,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042956860] [2021-08-06 20:47:23,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:47:23,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:23,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:47:23,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:47:23,113 INFO L87 Difference]: Start difference. First operand 2341 states and 5430 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:23,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:23,679 INFO L93 Difference]: Finished difference Result 4358 states and 9214 transitions. [2021-08-06 20:47:23,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 20:47:23,679 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:23,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:23,685 INFO L225 Difference]: With dead ends: 4358 [2021-08-06 20:47:23,685 INFO L226 Difference]: Without dead ends: 4358 [2021-08-06 20:47:23,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 397.7ms TimeCoverageRelationStatistics Valid=547, Invalid=1523, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:47:23,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4358 states. [2021-08-06 20:47:23,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4358 to 2339. [2021-08-06 20:47:23,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 2.3199315654405477) internal successors, (5424), 2338 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:23,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 5424 transitions. [2021-08-06 20:47:23,720 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 5424 transitions. Word has length 28 [2021-08-06 20:47:23,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:23,720 INFO L470 AbstractCegarLoop]: Abstraction has 2339 states and 5424 transitions. [2021-08-06 20:47:23,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:23,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 5424 transitions. [2021-08-06 20:47:23,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:23,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:23,723 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:23,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-06 20:47:23,923 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 [2021-08-06 20:47:23,924 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:23,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:23,924 INFO L82 PathProgramCache]: Analyzing trace with hash 2088628792, now seen corresponding path program 46 times [2021-08-06 20:47:23,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:23,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053283892] [2021-08-06 20:47:23,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:23,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:47:23,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:23,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053283892] [2021-08-06 20:47:23,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053283892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:23,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424253532] [2021-08-06 20:47:23,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:47:23,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:23,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:23,979 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) [2021-08-06 20:47:23,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 20:47:26,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:47:26,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:26,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:47:26,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:26,395 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:47:26,396 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:47:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:26,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424253532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:26,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:26,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:47:26,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982384659] [2021-08-06 20:47:26,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:47:26,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:26,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:47:26,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:47:26,425 INFO L87 Difference]: Start difference. First operand 2339 states and 5424 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:26,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:26,758 INFO L93 Difference]: Finished difference Result 3076 states and 6770 transitions. [2021-08-06 20:47:26,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:47:26,759 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:26,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:26,762 INFO L225 Difference]: With dead ends: 3076 [2021-08-06 20:47:26,762 INFO L226 Difference]: Without dead ends: 3070 [2021-08-06 20:47:26,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 214.2ms TimeCoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:47:26,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-08-06 20:47:26,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 2664. [2021-08-06 20:47:26,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2664 states, 2663 states have (on average 2.3259481787457754) internal successors, (6194), 2663 states have internal predecessors, (6194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:26,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 6194 transitions. [2021-08-06 20:47:26,792 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 6194 transitions. Word has length 28 [2021-08-06 20:47:26,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:26,792 INFO L470 AbstractCegarLoop]: Abstraction has 2664 states and 6194 transitions. [2021-08-06 20:47:26,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:26,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 6194 transitions. [2021-08-06 20:47:26,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:26,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:26,795 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:26,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-06 20:47:26,996 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 [2021-08-06 20:47:26,996 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:26,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:26,996 INFO L82 PathProgramCache]: Analyzing trace with hash -676222408, now seen corresponding path program 47 times [2021-08-06 20:47:26,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:26,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214155257] [2021-08-06 20:47:26,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:26,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:47:27,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:27,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214155257] [2021-08-06 20:47:27,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214155257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:27,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045965394] [2021-08-06 20:47:27,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:47:27,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:27,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:27,061 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) [2021-08-06 20:47:27,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 20:47:29,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:47:29,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:29,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:47:29,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:29,473 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:47:29,474 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:47:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:29,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045965394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:29,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:29,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:47:29,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626518810] [2021-08-06 20:47:29,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:47:29,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:29,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:47:29,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:47:29,510 INFO L87 Difference]: Start difference. First operand 2664 states and 6194 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:29,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:29,834 INFO L93 Difference]: Finished difference Result 3068 states and 6755 transitions. [2021-08-06 20:47:29,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:47:29,834 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:29,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:29,838 INFO L225 Difference]: With dead ends: 3068 [2021-08-06 20:47:29,838 INFO L226 Difference]: Without dead ends: 3062 [2021-08-06 20:47:29,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 221.8ms TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:47:29,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2021-08-06 20:47:29,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 2638. [2021-08-06 20:47:29,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.3253697383390217) internal successors, (6132), 2637 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:29,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 6132 transitions. [2021-08-06 20:47:29,868 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 6132 transitions. Word has length 28 [2021-08-06 20:47:29,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:29,868 INFO L470 AbstractCegarLoop]: Abstraction has 2638 states and 6132 transitions. [2021-08-06 20:47:29,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:29,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 6132 transitions. [2021-08-06 20:47:29,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:29,871 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:29,871 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:29,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-06 20:47:30,072 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 [2021-08-06 20:47:30,072 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:30,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:30,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1292601912, now seen corresponding path program 48 times [2021-08-06 20:47:30,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:30,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264726810] [2021-08-06 20:47:30,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:30,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:30,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:30,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264726810] [2021-08-06 20:47:30,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264726810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:30,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260701894] [2021-08-06 20:47:30,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:47:30,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:30,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:30,145 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) [2021-08-06 20:47:30,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 20:47:32,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:47:32,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:32,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:47:32,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:32,605 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:47:32,605 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:47:32,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:32,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260701894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:32,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:32,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-06 20:47:32,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199850177] [2021-08-06 20:47:32,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:47:32,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:32,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:47:32,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:47:32,634 INFO L87 Difference]: Start difference. First operand 2638 states and 6132 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:32,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:32,962 INFO L93 Difference]: Finished difference Result 3170 states and 6990 transitions. [2021-08-06 20:47:32,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:47:32,962 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:32,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:32,966 INFO L225 Difference]: With dead ends: 3170 [2021-08-06 20:47:32,966 INFO L226 Difference]: Without dead ends: 3166 [2021-08-06 20:47:32,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 223.6ms TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:47:32,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2021-08-06 20:47:32,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 2638. [2021-08-06 20:47:32,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.3246113007205156) internal successors, (6130), 2637 states have internal predecessors, (6130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:32,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 6130 transitions. [2021-08-06 20:47:32,999 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 6130 transitions. Word has length 28 [2021-08-06 20:47:32,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:32,999 INFO L470 AbstractCegarLoop]: Abstraction has 2638 states and 6130 transitions. [2021-08-06 20:47:32,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:32,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 6130 transitions. [2021-08-06 20:47:33,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:33,002 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:33,002 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:33,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-06 20:47:33,202 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 [2021-08-06 20:47:33,202 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:33,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:33,203 INFO L82 PathProgramCache]: Analyzing trace with hash -279782856, now seen corresponding path program 49 times [2021-08-06 20:47:33,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:33,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294921429] [2021-08-06 20:47:33,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:33,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:33,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:33,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294921429] [2021-08-06 20:47:33,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294921429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:33,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410695456] [2021-08-06 20:47:33,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:47:33,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:33,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:33,258 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) [2021-08-06 20:47:33,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 20:47:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:35,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:47:35,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:35,715 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:35,715 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:35,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410695456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:35,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:35,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-06 20:47:35,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937678757] [2021-08-06 20:47:35,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:47:35,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:35,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:47:35,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:47:35,752 INFO L87 Difference]: Start difference. First operand 2638 states and 6130 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:36,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:36,253 INFO L93 Difference]: Finished difference Result 3279 states and 7273 transitions. [2021-08-06 20:47:36,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 20:47:36,253 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:36,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:36,257 INFO L225 Difference]: With dead ends: 3279 [2021-08-06 20:47:36,257 INFO L226 Difference]: Without dead ends: 3279 [2021-08-06 20:47:36,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 359.5ms TimeCoverageRelationStatistics Valid=455, Invalid=1351, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:47:36,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2021-08-06 20:47:36,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 2607. [2021-08-06 20:47:36,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2607 states, 2606 states have (on average 2.3303914044512664) internal successors, (6073), 2606 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:36,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2607 states to 2607 states and 6073 transitions. [2021-08-06 20:47:36,287 INFO L78 Accepts]: Start accepts. Automaton has 2607 states and 6073 transitions. Word has length 28 [2021-08-06 20:47:36,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:36,287 INFO L470 AbstractCegarLoop]: Abstraction has 2607 states and 6073 transitions. [2021-08-06 20:47:36,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:36,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2607 states and 6073 transitions. [2021-08-06 20:47:36,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:36,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:36,290 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:36,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-06 20:47:36,490 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 [2021-08-06 20:47:36,491 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:36,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:36,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1013904380, now seen corresponding path program 50 times [2021-08-06 20:47:36,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:36,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931669932] [2021-08-06 20:47:36,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:36,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:36,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:36,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931669932] [2021-08-06 20:47:36,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931669932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:36,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356743753] [2021-08-06 20:47:36,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:47:36,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:36,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:36,555 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) [2021-08-06 20:47:36,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 20:47:38,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:47:38,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:38,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:47:38,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:39,067 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:47:39,067 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:47:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:39,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356743753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:39,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:39,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:47:39,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187474138] [2021-08-06 20:47:39,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:47:39,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:39,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:47:39,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:47:39,096 INFO L87 Difference]: Start difference. First operand 2607 states and 6073 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:39,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:39,473 INFO L93 Difference]: Finished difference Result 3388 states and 7501 transitions. [2021-08-06 20:47:39,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:47:39,473 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:39,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:39,477 INFO L225 Difference]: With dead ends: 3388 [2021-08-06 20:47:39,478 INFO L226 Difference]: Without dead ends: 3384 [2021-08-06 20:47:39,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 228.3ms TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:47:39,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3384 states. [2021-08-06 20:47:39,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3384 to 2722. [2021-08-06 20:47:39,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2721 states have (on average 2.34215361999265) internal successors, (6373), 2721 states have internal predecessors, (6373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:39,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 6373 transitions. [2021-08-06 20:47:39,526 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 6373 transitions. Word has length 28 [2021-08-06 20:47:39,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:39,527 INFO L470 AbstractCegarLoop]: Abstraction has 2722 states and 6373 transitions. [2021-08-06 20:47:39,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:39,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 6373 transitions. [2021-08-06 20:47:39,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:39,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:39,530 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:39,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-06 20:47:39,730 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 [2021-08-06 20:47:39,730 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:39,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:39,731 INFO L82 PathProgramCache]: Analyzing trace with hash -558480388, now seen corresponding path program 51 times [2021-08-06 20:47:39,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:39,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997152283] [2021-08-06 20:47:39,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:39,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:39,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:39,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:39,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997152283] [2021-08-06 20:47:39,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997152283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:39,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649699245] [2021-08-06 20:47:39,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:47:39,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:39,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:39,814 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) [2021-08-06 20:47:39,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 20:47:42,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:47:42,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:42,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:47:42,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:42,292 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:42,293 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:42,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649699245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:42,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:42,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:47:42,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007686822] [2021-08-06 20:47:42,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:47:42,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:42,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:47:42,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:47:42,330 INFO L87 Difference]: Start difference. First operand 2722 states and 6373 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:42,853 INFO L93 Difference]: Finished difference Result 3050 states and 6845 transitions. [2021-08-06 20:47:42,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:47:42,854 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:42,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:42,857 INFO L225 Difference]: With dead ends: 3050 [2021-08-06 20:47:42,857 INFO L226 Difference]: Without dead ends: 3050 [2021-08-06 20:47:42,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 337.3ms TimeCoverageRelationStatistics Valid=467, Invalid=1255, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:47:42,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3050 states. [2021-08-06 20:47:42,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3050 to 2705. [2021-08-06 20:47:42,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2705 states, 2704 states have (on average 2.342085798816568) internal successors, (6333), 2704 states have internal predecessors, (6333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:42,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2705 states to 2705 states and 6333 transitions. [2021-08-06 20:47:42,891 INFO L78 Accepts]: Start accepts. Automaton has 2705 states and 6333 transitions. Word has length 28 [2021-08-06 20:47:42,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:42,891 INFO L470 AbstractCegarLoop]: Abstraction has 2705 states and 6333 transitions. [2021-08-06 20:47:42,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:42,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2705 states and 6333 transitions. [2021-08-06 20:47:42,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:42,894 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:42,894 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:42,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-06 20:47:43,094 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 [2021-08-06 20:47:43,095 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:43,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:43,095 INFO L82 PathProgramCache]: Analyzing trace with hash -916332608, now seen corresponding path program 52 times [2021-08-06 20:47:43,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:43,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491883924] [2021-08-06 20:47:43,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:43,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:43,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:43,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:43,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491883924] [2021-08-06 20:47:43,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491883924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:43,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284171649] [2021-08-06 20:47:43,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:47:43,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:43,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:43,159 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) [2021-08-06 20:47:43,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 20:47:45,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:47:45,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:45,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:47:45,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:45,653 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:45,654 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:45,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284171649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:45,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:45,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:47:45,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662351401] [2021-08-06 20:47:45,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:47:45,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:45,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:47:45,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:47:45,690 INFO L87 Difference]: Start difference. First operand 2705 states and 6333 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:46,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:46,251 INFO L93 Difference]: Finished difference Result 3600 states and 8092 transitions. [2021-08-06 20:47:46,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:47:46,252 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:46,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:46,256 INFO L225 Difference]: With dead ends: 3600 [2021-08-06 20:47:46,256 INFO L226 Difference]: Without dead ends: 3600 [2021-08-06 20:47:46,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 403.6ms TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:47:46,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2021-08-06 20:47:46,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 2827. [2021-08-06 20:47:46,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2827 states, 2826 states have (on average 2.33793347487615) internal successors, (6607), 2826 states have internal predecessors, (6607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:46,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 6607 transitions. [2021-08-06 20:47:46,292 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 6607 transitions. Word has length 28 [2021-08-06 20:47:46,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:46,292 INFO L470 AbstractCegarLoop]: Abstraction has 2827 states and 6607 transitions. [2021-08-06 20:47:46,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:46,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 6607 transitions. [2021-08-06 20:47:46,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:46,296 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:46,296 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:46,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-06 20:47:46,500 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 [2021-08-06 20:47:46,501 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:46,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:46,501 INFO L82 PathProgramCache]: Analyzing trace with hash 449185148, now seen corresponding path program 27 times [2021-08-06 20:47:46,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:46,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534497397] [2021-08-06 20:47:46,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:46,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:46,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:46,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534497397] [2021-08-06 20:47:46,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534497397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:46,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133736682] [2021-08-06 20:47:46,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:47:46,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:46,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:46,564 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) [2021-08-06 20:47:46,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 20:47:48,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 20:47:48,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:48,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:47:48,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:49,211 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:49,212 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:49,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133736682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:49,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:49,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 20:47:49,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010021442] [2021-08-06 20:47:49,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:47:49,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:49,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:47:49,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:47:49,234 INFO L87 Difference]: Start difference. First operand 2827 states and 6607 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:50,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:50,254 INFO L93 Difference]: Finished difference Result 9795 states and 20250 transitions. [2021-08-06 20:47:50,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-06 20:47:50,255 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:50,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:50,268 INFO L225 Difference]: With dead ends: 9795 [2021-08-06 20:47:50,268 INFO L226 Difference]: Without dead ends: 9795 [2021-08-06 20:47:50,269 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 764.3ms TimeCoverageRelationStatistics Valid=1259, Invalid=4291, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 20:47:50,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9795 states. [2021-08-06 20:47:50,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9795 to 3950. [2021-08-06 20:47:50,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3950 states, 3949 states have (on average 2.37680425424158) internal successors, (9386), 3949 states have internal predecessors, (9386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:50,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3950 states to 3950 states and 9386 transitions. [2021-08-06 20:47:50,349 INFO L78 Accepts]: Start accepts. Automaton has 3950 states and 9386 transitions. Word has length 28 [2021-08-06 20:47:50,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:50,349 INFO L470 AbstractCegarLoop]: Abstraction has 3950 states and 9386 transitions. [2021-08-06 20:47:50,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:50,350 INFO L276 IsEmpty]: Start isEmpty. Operand 3950 states and 9386 transitions. [2021-08-06 20:47:50,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:50,354 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:50,354 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:50,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-06 20:47:50,554 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 [2021-08-06 20:47:50,555 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:50,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:50,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1972617152, now seen corresponding path program 53 times [2021-08-06 20:47:50,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:50,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904656397] [2021-08-06 20:47:50,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:50,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:50,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:50,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904656397] [2021-08-06 20:47:50,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904656397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:50,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487390459] [2021-08-06 20:47:50,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:47:50,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:50,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:50,616 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) [2021-08-06 20:47:50,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 20:47:52,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:47:52,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:52,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:47:52,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:53,162 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:53,162 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:53,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487390459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:53,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:53,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 20:47:53,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947227403] [2021-08-06 20:47:53,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:47:53,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:53,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:47:53,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:47:53,199 INFO L87 Difference]: Start difference. First operand 3950 states and 9386 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-08-06 20:47:53,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:53,822 INFO L93 Difference]: Finished difference Result 4942 states and 11354 transitions. [2021-08-06 20:47:53,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 20:47:53,823 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-08-06 20:47:53,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:53,829 INFO L225 Difference]: With dead ends: 4942 [2021-08-06 20:47:53,829 INFO L226 Difference]: Without dead ends: 4942 [2021-08-06 20:47:53,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 411.9ms TimeCoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:47:53,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4942 states. [2021-08-06 20:47:53,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4942 to 4101. [2021-08-06 20:47:53,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4101 states, 4100 states have (on average 2.358780487804878) internal successors, (9671), 4100 states have internal predecessors, (9671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:53,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4101 states to 4101 states and 9671 transitions. [2021-08-06 20:47:53,899 INFO L78 Accepts]: Start accepts. Automaton has 4101 states and 9671 transitions. Word has length 28 [2021-08-06 20:47:53,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:53,899 INFO L470 AbstractCegarLoop]: Abstraction has 4101 states and 9671 transitions. [2021-08-06 20:47:53,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-08-06 20:47:53,900 INFO L276 IsEmpty]: Start isEmpty. Operand 4101 states and 9671 transitions. [2021-08-06 20:47:53,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:53,905 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:53,905 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:53,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-06 20:47:54,132 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 [2021-08-06 20:47:54,133 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:54,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:54,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1586685124, now seen corresponding path program 54 times [2021-08-06 20:47:54,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:54,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796765088] [2021-08-06 20:47:54,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:54,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:54,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:54,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796765088] [2021-08-06 20:47:54,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796765088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:54,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496289634] [2021-08-06 20:47:54,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:47:54,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:54,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:54,200 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) [2021-08-06 20:47:54,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 20:47:56,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:47:56,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:56,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:47:56,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:56,761 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:56,761 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:47:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:47:56,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496289634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:56,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:56,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 20:47:56,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583323941] [2021-08-06 20:47:56,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:47:56,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:56,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:47:56,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:47:56,784 INFO L87 Difference]: Start difference. First operand 4101 states and 9671 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:57,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:57,243 INFO L93 Difference]: Finished difference Result 7329 states and 15681 transitions. [2021-08-06 20:47:57,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:47:57,243 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:47:57,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:57,252 INFO L225 Difference]: With dead ends: 7329 [2021-08-06 20:47:57,252 INFO L226 Difference]: Without dead ends: 7329 [2021-08-06 20:47:57,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 323.2ms TimeCoverageRelationStatistics Valid=390, Invalid=1250, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:47:57,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7329 states. [2021-08-06 20:47:57,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7329 to 4378. [2021-08-06 20:47:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4378 states, 4377 states have (on average 2.368745716244003) internal successors, (10368), 4377 states have internal predecessors, (10368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:57,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 10368 transitions. [2021-08-06 20:47:57,347 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 10368 transitions. Word has length 28 [2021-08-06 20:47:57,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:57,347 INFO L470 AbstractCegarLoop]: Abstraction has 4378 states and 10368 transitions. [2021-08-06 20:47:57,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:57,348 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 10368 transitions. [2021-08-06 20:47:57,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:47:57,354 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:57,354 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:57,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-06 20:47:57,558 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 [2021-08-06 20:47:57,559 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:57,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:57,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1216787260, now seen corresponding path program 55 times [2021-08-06 20:47:57,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:57,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611754927] [2021-08-06 20:47:57,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:57,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:57,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:57,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:57,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611754927] [2021-08-06 20:47:57,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611754927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:57,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975737046] [2021-08-06 20:47:57,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:47:57,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:57,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:57,645 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) [2021-08-06 20:47:57,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 20:48:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:00,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:48:00,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:00,261 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:00,261 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:48:00,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975737046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:00,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:00,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 20:48:00,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149495131] [2021-08-06 20:48:00,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:48:00,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:00,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:48:00,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:48:00,285 INFO L87 Difference]: Start difference. First operand 4378 states and 10368 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:00,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:00,981 INFO L93 Difference]: Finished difference Result 7739 states and 16425 transitions. [2021-08-06 20:48:00,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 20:48:00,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:48:00,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:01,022 INFO L225 Difference]: With dead ends: 7739 [2021-08-06 20:48:01,022 INFO L226 Difference]: Without dead ends: 7739 [2021-08-06 20:48:01,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 505.7ms TimeCoverageRelationStatistics Valid=750, Invalid=2672, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 20:48:01,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7739 states. [2021-08-06 20:48:01,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7739 to 4275. [2021-08-06 20:48:01,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4275 states, 4274 states have (on average 2.3521291530182498) internal successors, (10053), 4274 states have internal predecessors, (10053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:01,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4275 states to 4275 states and 10053 transitions. [2021-08-06 20:48:01,083 INFO L78 Accepts]: Start accepts. Automaton has 4275 states and 10053 transitions. Word has length 28 [2021-08-06 20:48:01,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:01,083 INFO L470 AbstractCegarLoop]: Abstraction has 4275 states and 10053 transitions. [2021-08-06 20:48:01,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:01,083 INFO L276 IsEmpty]: Start isEmpty. Operand 4275 states and 10053 transitions. [2021-08-06 20:48:01,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:48:01,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:01,087 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:01,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-06 20:48:01,288 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 [2021-08-06 20:48:01,288 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:01,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:01,288 INFO L82 PathProgramCache]: Analyzing trace with hash -893490760, now seen corresponding path program 56 times [2021-08-06 20:48:01,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:01,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558961761] [2021-08-06 20:48:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:01,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:48:01,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:01,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558961761] [2021-08-06 20:48:01,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558961761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:01,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800643943] [2021-08-06 20:48:01,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:48:01,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:01,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:01,368 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) [2021-08-06 20:48:01,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 20:48:03,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:48:03,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:03,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:48:03,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:03,958 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:48:03,959 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:48:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:48:04,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800643943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:04,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:04,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-06 20:48:04,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015676759] [2021-08-06 20:48:04,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:48:04,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:04,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:48:04,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:48:04,002 INFO L87 Difference]: Start difference. First operand 4275 states and 10053 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-08-06 20:48:04,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:04,087 INFO L93 Difference]: Finished difference Result 5574 states and 12759 transitions. [2021-08-06 20:48:04,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:48:04,088 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 28 [2021-08-06 20:48:04,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:04,094 INFO L225 Difference]: With dead ends: 5574 [2021-08-06 20:48:04,094 INFO L226 Difference]: Without dead ends: 5572 [2021-08-06 20:48:04,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:48:04,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5572 states. [2021-08-06 20:48:04,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5572 to 4369. [2021-08-06 20:48:04,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4369 states, 4368 states have (on average 2.35485347985348) internal successors, (10286), 4368 states have internal predecessors, (10286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:04,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4369 states to 4369 states and 10286 transitions. [2021-08-06 20:48:04,149 INFO L78 Accepts]: Start accepts. Automaton has 4369 states and 10286 transitions. Word has length 28 [2021-08-06 20:48:04,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:04,150 INFO L470 AbstractCegarLoop]: Abstraction has 4369 states and 10286 transitions. [2021-08-06 20:48:04,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-08-06 20:48:04,150 INFO L276 IsEmpty]: Start isEmpty. Operand 4369 states and 10286 transitions. [2021-08-06 20:48:04,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:48:04,154 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:04,154 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:04,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-06 20:48:04,355 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 [2021-08-06 20:48:04,355 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:04,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:04,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1551728952, now seen corresponding path program 57 times [2021-08-06 20:48:04,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:04,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062616407] [2021-08-06 20:48:04,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:04,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:04,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:04,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062616407] [2021-08-06 20:48:04,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062616407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:04,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369379407] [2021-08-06 20:48:04,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:48:04,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:04,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:04,428 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) [2021-08-06 20:48:04,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 20:48:06,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:48:06,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:06,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:48:06,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:06,969 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:48:06,970 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:48:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:06,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369379407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:06,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:06,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-08-06 20:48:06,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704283779] [2021-08-06 20:48:06,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:48:06,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:07,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:48:07,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:48:07,000 INFO L87 Difference]: Start difference. First operand 4369 states and 10286 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:07,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:07,145 INFO L93 Difference]: Finished difference Result 6221 states and 14187 transitions. [2021-08-06 20:48:07,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:48:07,145 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:48:07,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:07,153 INFO L225 Difference]: With dead ends: 6221 [2021-08-06 20:48:07,153 INFO L226 Difference]: Without dead ends: 6209 [2021-08-06 20:48:07,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:48:07,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6209 states. [2021-08-06 20:48:07,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6209 to 5668. [2021-08-06 20:48:07,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5668 states, 5667 states have (on average 2.33315687312511) internal successors, (13222), 5667 states have internal predecessors, (13222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:07,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5668 states to 5668 states and 13222 transitions. [2021-08-06 20:48:07,222 INFO L78 Accepts]: Start accepts. Automaton has 5668 states and 13222 transitions. Word has length 28 [2021-08-06 20:48:07,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:07,222 INFO L470 AbstractCegarLoop]: Abstraction has 5668 states and 13222 transitions. [2021-08-06 20:48:07,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:07,222 INFO L276 IsEmpty]: Start isEmpty. Operand 5668 states and 13222 transitions. [2021-08-06 20:48:07,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:48:07,228 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:07,228 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:07,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-06 20:48:07,429 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 [2021-08-06 20:48:07,429 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:07,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:07,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1689517640, now seen corresponding path program 58 times [2021-08-06 20:48:07,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:07,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985901250] [2021-08-06 20:48:07,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:07,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:48:07,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:07,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985901250] [2021-08-06 20:48:07,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985901250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:07,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608977276] [2021-08-06 20:48:07,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:48:07,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:07,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:07,488 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) [2021-08-06 20:48:07,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 20:48:09,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:48:09,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:09,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:48:09,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:10,089 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:10,090 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:48:10,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608977276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:10,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:10,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-06 20:48:10,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241320158] [2021-08-06 20:48:10,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:48:10,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:10,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:48:10,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:48:10,134 INFO L87 Difference]: Start difference. First operand 5668 states and 13222 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-08-06 20:48:10,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:10,248 INFO L93 Difference]: Finished difference Result 6744 states and 15385 transitions. [2021-08-06 20:48:10,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:48:10,249 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 28 [2021-08-06 20:48:10,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:10,257 INFO L225 Difference]: With dead ends: 6744 [2021-08-06 20:48:10,257 INFO L226 Difference]: Without dead ends: 6744 [2021-08-06 20:48:10,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:48:10,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6744 states. [2021-08-06 20:48:10,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6744 to 5474. [2021-08-06 20:48:10,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5474 states, 5473 states have (on average 2.319020646811621) internal successors, (12692), 5473 states have internal predecessors, (12692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:10,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5474 states to 5474 states and 12692 transitions. [2021-08-06 20:48:10,325 INFO L78 Accepts]: Start accepts. Automaton has 5474 states and 12692 transitions. Word has length 28 [2021-08-06 20:48:10,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:10,325 INFO L470 AbstractCegarLoop]: Abstraction has 5474 states and 12692 transitions. [2021-08-06 20:48:10,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-08-06 20:48:10,325 INFO L276 IsEmpty]: Start isEmpty. Operand 5474 states and 12692 transitions. [2021-08-06 20:48:10,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:48:10,330 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:10,331 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:10,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-06 20:48:10,531 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 [2021-08-06 20:48:10,531 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:10,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:10,531 INFO L82 PathProgramCache]: Analyzing trace with hash 746070328, now seen corresponding path program 59 times [2021-08-06 20:48:10,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:10,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539369214] [2021-08-06 20:48:10,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:10,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:10,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:10,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539369214] [2021-08-06 20:48:10,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539369214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:10,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676698284] [2021-08-06 20:48:10,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:48:10,602 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:10,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:10,603 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) [2021-08-06 20:48:10,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 20:48:13,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:48:13,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:13,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:48:13,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:13,229 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:13,230 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:13,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:13,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676698284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:13,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:13,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-06 20:48:13,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498972260] [2021-08-06 20:48:13,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:48:13,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:13,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:48:13,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:48:13,266 INFO L87 Difference]: Start difference. First operand 5474 states and 12692 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:13,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:13,418 INFO L93 Difference]: Finished difference Result 5652 states and 12889 transitions. [2021-08-06 20:48:13,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:48:13,418 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:48:13,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:13,425 INFO L225 Difference]: With dead ends: 5652 [2021-08-06 20:48:13,425 INFO L226 Difference]: Without dead ends: 5652 [2021-08-06 20:48:13,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:48:13,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5652 states. [2021-08-06 20:48:13,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5652 to 5329. [2021-08-06 20:48:13,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5329 states, 5328 states have (on average 2.313626126126126) internal successors, (12327), 5328 states have internal predecessors, (12327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:13,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5329 states to 5329 states and 12327 transitions. [2021-08-06 20:48:13,486 INFO L78 Accepts]: Start accepts. Automaton has 5329 states and 12327 transitions. Word has length 28 [2021-08-06 20:48:13,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:13,486 INFO L470 AbstractCegarLoop]: Abstraction has 5329 states and 12327 transitions. [2021-08-06 20:48:13,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:13,486 INFO L276 IsEmpty]: Start isEmpty. Operand 5329 states and 12327 transitions. [2021-08-06 20:48:13,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:48:13,491 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:13,491 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:13,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-06 20:48:13,691 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 [2021-08-06 20:48:13,692 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:13,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:13,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1943270792, now seen corresponding path program 60 times [2021-08-06 20:48:13,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:13,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192394182] [2021-08-06 20:48:13,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:13,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:48:13,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:13,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192394182] [2021-08-06 20:48:13,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192394182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:13,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178735166] [2021-08-06 20:48:13,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:48:13,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:13,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:13,751 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) [2021-08-06 20:48:13,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 20:48:16,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:48:16,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:16,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:48:16,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:16,343 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:16,344 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:48:16,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178735166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:16,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:16,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-06 20:48:16,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178558852] [2021-08-06 20:48:16,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:48:16,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:16,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:48:16,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:48:16,387 INFO L87 Difference]: Start difference. First operand 5329 states and 12327 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:16,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:16,488 INFO L93 Difference]: Finished difference Result 5541 states and 12764 transitions. [2021-08-06 20:48:16,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:48:16,488 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:48:16,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:16,494 INFO L225 Difference]: With dead ends: 5541 [2021-08-06 20:48:16,494 INFO L226 Difference]: Without dead ends: 5541 [2021-08-06 20:48:16,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:48:16,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5541 states. [2021-08-06 20:48:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5541 to 5302. [2021-08-06 20:48:16,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5302 states, 5301 states have (on average 2.312582531597812) internal successors, (12259), 5301 states have internal predecessors, (12259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:16,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5302 states to 5302 states and 12259 transitions. [2021-08-06 20:48:16,565 INFO L78 Accepts]: Start accepts. Automaton has 5302 states and 12259 transitions. Word has length 28 [2021-08-06 20:48:16,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:16,565 INFO L470 AbstractCegarLoop]: Abstraction has 5302 states and 12259 transitions. [2021-08-06 20:48:16,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:16,565 INFO L276 IsEmpty]: Start isEmpty. Operand 5302 states and 12259 transitions. [2021-08-06 20:48:16,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:48:16,571 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:16,571 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:16,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-06 20:48:16,772 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 [2021-08-06 20:48:16,772 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:16,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:16,772 INFO L82 PathProgramCache]: Analyzing trace with hash -668128392, now seen corresponding path program 61 times [2021-08-06 20:48:16,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:16,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981824268] [2021-08-06 20:48:16,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:16,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:48:16,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:16,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981824268] [2021-08-06 20:48:16,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981824268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:16,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159379470] [2021-08-06 20:48:16,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:48:16,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:16,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:16,825 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) [2021-08-06 20:48:16,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 20:48:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:19,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:48:19,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:19,469 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:19,470 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:48:19,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159379470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:19,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:19,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-06 20:48:19,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954533623] [2021-08-06 20:48:19,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:48:19,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:19,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:48:19,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:48:19,518 INFO L87 Difference]: Start difference. First operand 5302 states and 12259 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:19,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:19,645 INFO L93 Difference]: Finished difference Result 5856 states and 13416 transitions. [2021-08-06 20:48:19,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:48:19,645 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:48:19,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:19,652 INFO L225 Difference]: With dead ends: 5856 [2021-08-06 20:48:19,653 INFO L226 Difference]: Without dead ends: 5856 [2021-08-06 20:48:19,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:48:19,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5856 states. [2021-08-06 20:48:19,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5856 to 5513. [2021-08-06 20:48:19,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5513 states, 5512 states have (on average 2.304789550072569) internal successors, (12704), 5512 states have internal predecessors, (12704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5513 states to 5513 states and 12704 transitions. [2021-08-06 20:48:19,719 INFO L78 Accepts]: Start accepts. Automaton has 5513 states and 12704 transitions. Word has length 28 [2021-08-06 20:48:19,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:19,719 INFO L470 AbstractCegarLoop]: Abstraction has 5513 states and 12704 transitions. [2021-08-06 20:48:19,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:19,720 INFO L276 IsEmpty]: Start isEmpty. Operand 5513 states and 12704 transitions. [2021-08-06 20:48:19,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:48:19,726 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:19,726 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:19,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-06 20:48:19,940 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 [2021-08-06 20:48:19,941 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:19,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:19,941 INFO L82 PathProgramCache]: Analyzing trace with hash 859737336, now seen corresponding path program 62 times [2021-08-06 20:48:19,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:19,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759646905] [2021-08-06 20:48:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:19,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:20,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:20,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759646905] [2021-08-06 20:48:20,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759646905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:20,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653806582] [2021-08-06 20:48:20,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:48:20,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:20,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:20,002 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) [2021-08-06 20:48:20,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 20:48:22,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:48:22,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:22,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:48:22,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:22,739 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:22,739 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:22,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653806582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:22,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:22,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 20:48:22,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717156570] [2021-08-06 20:48:22,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:48:22,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:22,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:48:22,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:48:22,762 INFO L87 Difference]: Start difference. First operand 5513 states and 12704 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:23,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:23,363 INFO L93 Difference]: Finished difference Result 13473 states and 28356 transitions. [2021-08-06 20:48:23,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 20:48:23,363 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:48:23,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:23,383 INFO L225 Difference]: With dead ends: 13473 [2021-08-06 20:48:23,383 INFO L226 Difference]: Without dead ends: 13473 [2021-08-06 20:48:23,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 421.3ms TimeCoverageRelationStatistics Valid=638, Invalid=1912, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 20:48:23,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13473 states. [2021-08-06 20:48:23,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13473 to 7579. [2021-08-06 20:48:23,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7579 states, 7578 states have (on average 2.3255476378991817) internal successors, (17623), 7578 states have internal predecessors, (17623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:23,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7579 states to 7579 states and 17623 transitions. [2021-08-06 20:48:23,533 INFO L78 Accepts]: Start accepts. Automaton has 7579 states and 17623 transitions. Word has length 28 [2021-08-06 20:48:23,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:23,533 INFO L470 AbstractCegarLoop]: Abstraction has 7579 states and 17623 transitions. [2021-08-06 20:48:23,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:23,533 INFO L276 IsEmpty]: Start isEmpty. Operand 7579 states and 17623 transitions. [2021-08-06 20:48:23,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:48:23,542 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:23,542 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:23,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-06 20:48:23,768 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 [2021-08-06 20:48:23,769 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:23,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:23,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1117559800, now seen corresponding path program 63 times [2021-08-06 20:48:23,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:23,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845088753] [2021-08-06 20:48:23,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:23,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:23,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:23,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:23,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845088753] [2021-08-06 20:48:23,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845088753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:23,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42066177] [2021-08-06 20:48:23,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:48:23,883 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:23,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:23,883 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) [2021-08-06 20:48:23,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 20:48:26,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:48:26,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:26,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:48:26,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:26,568 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:48:26,568 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:48:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:26,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42066177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:26,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:26,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-06 20:48:26,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330949546] [2021-08-06 20:48:26,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:48:26,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:26,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:48:26,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:48:26,598 INFO L87 Difference]: Start difference. First operand 7579 states and 17623 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:26,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:26,755 INFO L93 Difference]: Finished difference Result 9074 states and 20822 transitions. [2021-08-06 20:48:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:48:26,755 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:48:26,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:26,767 INFO L225 Difference]: With dead ends: 9074 [2021-08-06 20:48:26,767 INFO L226 Difference]: Without dead ends: 9070 [2021-08-06 20:48:26,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:48:26,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9070 states. [2021-08-06 20:48:26,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9070 to 8930. [2021-08-06 20:48:26,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8930 states, 8929 states have (on average 2.31470489416508) internal successors, (20668), 8929 states have internal predecessors, (20668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:26,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8930 states to 8930 states and 20668 transitions. [2021-08-06 20:48:26,883 INFO L78 Accepts]: Start accepts. Automaton has 8930 states and 20668 transitions. Word has length 28 [2021-08-06 20:48:26,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:26,884 INFO L470 AbstractCegarLoop]: Abstraction has 8930 states and 20668 transitions. [2021-08-06 20:48:26,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:26,884 INFO L276 IsEmpty]: Start isEmpty. Operand 8930 states and 20668 transitions. [2021-08-06 20:48:26,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:48:26,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:26,897 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:26,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-06 20:48:27,112 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 [2021-08-06 20:48:27,113 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:27,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:27,113 INFO L82 PathProgramCache]: Analyzing trace with hash -454824968, now seen corresponding path program 64 times [2021-08-06 20:48:27,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:27,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187957143] [2021-08-06 20:48:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:27,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:27,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:27,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187957143] [2021-08-06 20:48:27,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187957143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:27,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384331202] [2021-08-06 20:48:27,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:48:27,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:27,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:27,175 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) [2021-08-06 20:48:27,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 20:48:29,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:48:29,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:29,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:48:29,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:29,812 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:29,812 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:29,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384331202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:29,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:29,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-06 20:48:29,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489627667] [2021-08-06 20:48:29,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:48:29,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:29,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:48:29,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:48:29,849 INFO L87 Difference]: Start difference. First operand 8930 states and 20668 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:30,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:30,084 INFO L93 Difference]: Finished difference Result 9091 states and 20867 transitions. [2021-08-06 20:48:30,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:48:30,085 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:48:30,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:30,097 INFO L225 Difference]: With dead ends: 9091 [2021-08-06 20:48:30,097 INFO L226 Difference]: Without dead ends: 9091 [2021-08-06 20:48:30,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 155.8ms TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:48:30,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9091 states. [2021-08-06 20:48:30,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9091 to 8867. [2021-08-06 20:48:30,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8867 states, 8866 states have (on average 2.3128806677193774) internal successors, (20506), 8866 states have internal predecessors, (20506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:30,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8867 states to 8867 states and 20506 transitions. [2021-08-06 20:48:30,213 INFO L78 Accepts]: Start accepts. Automaton has 8867 states and 20506 transitions. Word has length 28 [2021-08-06 20:48:30,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:30,213 INFO L470 AbstractCegarLoop]: Abstraction has 8867 states and 20506 transitions. [2021-08-06 20:48:30,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:30,213 INFO L276 IsEmpty]: Start isEmpty. Operand 8867 states and 20506 transitions. [2021-08-06 20:48:30,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:48:30,225 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:30,225 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:30,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-06 20:48:30,452 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 [2021-08-06 20:48:30,453 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:30,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:30,453 INFO L82 PathProgramCache]: Analyzing trace with hash -812677188, now seen corresponding path program 65 times [2021-08-06 20:48:30,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:30,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061626971] [2021-08-06 20:48:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:30,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:48:30,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:30,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061626971] [2021-08-06 20:48:30,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061626971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:30,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403667116] [2021-08-06 20:48:30,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:48:30,522 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:30,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:30,523 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) [2021-08-06 20:48:30,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 20:48:33,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:48:33,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:33,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:48:33,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:33,159 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:33,159 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:48:33,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403667116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:33,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:33,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-06 20:48:33,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861431964] [2021-08-06 20:48:33,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:48:33,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:33,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:48:33,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:48:33,195 INFO L87 Difference]: Start difference. First operand 8867 states and 20506 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:33,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:33,414 INFO L93 Difference]: Finished difference Result 9107 states and 20977 transitions. [2021-08-06 20:48:33,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:48:33,414 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:48:33,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:33,427 INFO L225 Difference]: With dead ends: 9107 [2021-08-06 20:48:33,427 INFO L226 Difference]: Without dead ends: 9107 [2021-08-06 20:48:33,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:48:33,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9107 states. [2021-08-06 20:48:33,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9107 to 9006. [2021-08-06 20:48:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9006 states, 9005 states have (on average 2.3109383675735704) internal successors, (20810), 9005 states have internal predecessors, (20810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:33,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9006 states to 9006 states and 20810 transitions. [2021-08-06 20:48:33,543 INFO L78 Accepts]: Start accepts. Automaton has 9006 states and 20810 transitions. Word has length 28 [2021-08-06 20:48:33,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:33,543 INFO L470 AbstractCegarLoop]: Abstraction has 9006 states and 20810 transitions. [2021-08-06 20:48:33,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:33,543 INFO L276 IsEmpty]: Start isEmpty. Operand 9006 states and 20810 transitions. [2021-08-06 20:48:33,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:48:33,553 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:33,553 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:33,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-06 20:48:33,753 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 [2021-08-06 20:48:33,753 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:33,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:33,754 INFO L82 PathProgramCache]: Analyzing trace with hash -12851524, now seen corresponding path program 66 times [2021-08-06 20:48:33,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:33,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372411010] [2021-08-06 20:48:33,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:33,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:33,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:33,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372411010] [2021-08-06 20:48:33,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372411010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:33,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477128060] [2021-08-06 20:48:33,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:48:33,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:33,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:33,822 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) [2021-08-06 20:48:33,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 20:48:36,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:48:36,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:36,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:48:36,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:36,496 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:36,497 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:36,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477128060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:36,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:36,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-08-06 20:48:36,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144592611] [2021-08-06 20:48:36,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:48:36,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:36,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:48:36,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:48:36,533 INFO L87 Difference]: Start difference. First operand 9006 states and 20810 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:36,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:36,792 INFO L93 Difference]: Finished difference Result 9386 states and 21610 transitions. [2021-08-06 20:48:36,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:48:36,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:48:36,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:36,806 INFO L225 Difference]: With dead ends: 9386 [2021-08-06 20:48:36,806 INFO L226 Difference]: Without dead ends: 9386 [2021-08-06 20:48:36,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:48:36,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9386 states. [2021-08-06 20:48:36,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9386 to 9079. [2021-08-06 20:48:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9079 states, 9078 states have (on average 2.310420797532496) internal successors, (20974), 9078 states have internal predecessors, (20974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:36,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9079 states to 9079 states and 20974 transitions. [2021-08-06 20:48:36,929 INFO L78 Accepts]: Start accepts. Automaton has 9079 states and 20974 transitions. Word has length 28 [2021-08-06 20:48:36,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:36,929 INFO L470 AbstractCegarLoop]: Abstraction has 9079 states and 20974 transitions. [2021-08-06 20:48:36,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:36,929 INFO L276 IsEmpty]: Start isEmpty. Operand 9079 states and 20974 transitions. [2021-08-06 20:48:36,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:48:36,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:36,938 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:36,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-06 20:48:37,139 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 [2021-08-06 20:48:37,139 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:37,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:37,139 INFO L82 PathProgramCache]: Analyzing trace with hash 97899188, now seen corresponding path program 28 times [2021-08-06 20:48:37,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:37,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929766230] [2021-08-06 20:48:37,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:37,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:37,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:37,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929766230] [2021-08-06 20:48:37,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929766230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:37,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151732249] [2021-08-06 20:48:37,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:48:37,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:37,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:37,212 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) [2021-08-06 20:48:37,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 20:48:39,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:48:39,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:39,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:48:39,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:39,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151732249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:39,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:39,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 20:48:39,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866606864] [2021-08-06 20:48:39,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:48:39,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:39,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:48:39,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:48:39,988 INFO L87 Difference]: Start difference. First operand 9079 states and 20974 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:40,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:40,256 INFO L93 Difference]: Finished difference Result 11546 states and 26069 transitions. [2021-08-06 20:48:40,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:48:40,257 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:48:40,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:40,273 INFO L225 Difference]: With dead ends: 11546 [2021-08-06 20:48:40,273 INFO L226 Difference]: Without dead ends: 11522 [2021-08-06 20:48:40,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 214.2ms TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:48:40,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11522 states. [2021-08-06 20:48:40,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11522 to 9015. [2021-08-06 20:48:40,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9015 states, 9014 states have (on average 2.310073219436432) internal successors, (20823), 9014 states have internal predecessors, (20823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:40,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9015 states to 9015 states and 20823 transitions. [2021-08-06 20:48:40,440 INFO L78 Accepts]: Start accepts. Automaton has 9015 states and 20823 transitions. Word has length 28 [2021-08-06 20:48:40,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:40,440 INFO L470 AbstractCegarLoop]: Abstraction has 9015 states and 20823 transitions. [2021-08-06 20:48:40,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:40,440 INFO L276 IsEmpty]: Start isEmpty. Operand 9015 states and 20823 transitions. [2021-08-06 20:48:40,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:48:40,450 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:40,450 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:40,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-06 20:48:40,650 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 [2021-08-06 20:48:40,650 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:40,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:40,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1025606664, now seen corresponding path program 67 times [2021-08-06 20:48:40,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:40,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598508922] [2021-08-06 20:48:40,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:40,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:40,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:40,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:40,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598508922] [2021-08-06 20:48:40,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598508922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:40,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453010346] [2021-08-06 20:48:40,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:48:40,723 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:40,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:40,726 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) [2021-08-06 20:48:40,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 20:48:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:43,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:48:43,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:43,404 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:48:43,404 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:48:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:43,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453010346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:43,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:43,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-06 20:48:43,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821634624] [2021-08-06 20:48:43,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:48:43,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:43,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:48:43,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:48:43,434 INFO L87 Difference]: Start difference. First operand 9015 states and 20823 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:43,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:43,615 INFO L93 Difference]: Finished difference Result 10076 states and 22907 transitions. [2021-08-06 20:48:43,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:48:43,615 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:48:43,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:43,629 INFO L225 Difference]: With dead ends: 10076 [2021-08-06 20:48:43,629 INFO L226 Difference]: Without dead ends: 10072 [2021-08-06 20:48:43,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:48:43,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10072 states. [2021-08-06 20:48:43,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10072 to 9860. [2021-08-06 20:48:43,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9860 states, 9859 states have (on average 2.3005375798762553) internal successors, (22681), 9859 states have internal predecessors, (22681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:43,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9860 states to 9860 states and 22681 transitions. [2021-08-06 20:48:43,757 INFO L78 Accepts]: Start accepts. Automaton has 9860 states and 22681 transitions. Word has length 28 [2021-08-06 20:48:43,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:43,758 INFO L470 AbstractCegarLoop]: Abstraction has 9860 states and 22681 transitions. [2021-08-06 20:48:43,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:43,758 INFO L276 IsEmpty]: Start isEmpty. Operand 9860 states and 22681 transitions. [2021-08-06 20:48:43,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:48:43,767 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:43,768 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:43,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-06 20:48:43,968 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 [2021-08-06 20:48:43,968 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:43,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:43,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1339123644, now seen corresponding path program 68 times [2021-08-06 20:48:43,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:43,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114737071] [2021-08-06 20:48:43,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:43,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:44,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:44,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114737071] [2021-08-06 20:48:44,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114737071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:44,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169694316] [2021-08-06 20:48:44,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:48:44,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:44,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:44,087 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) [2021-08-06 20:48:44,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 20:48:46,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:48:46,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:46,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:48:46,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:46,774 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:46,775 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:46,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169694316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:46,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:46,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-06 20:48:46,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175017852] [2021-08-06 20:48:46,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:48:46,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:46,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:48:46,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:48:46,811 INFO L87 Difference]: Start difference. First operand 9860 states and 22681 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:47,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:47,101 INFO L93 Difference]: Finished difference Result 10069 states and 23088 transitions. [2021-08-06 20:48:47,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:48:47,101 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:48:47,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:47,115 INFO L225 Difference]: With dead ends: 10069 [2021-08-06 20:48:47,115 INFO L226 Difference]: Without dead ends: 10069 [2021-08-06 20:48:47,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 198.6ms TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:48:47,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10069 states. [2021-08-06 20:48:47,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10069 to 9943. [2021-08-06 20:48:47,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 2.298933816133575) internal successors, (22856), 9942 states have internal predecessors, (22856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:47,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 22856 transitions. [2021-08-06 20:48:47,244 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 22856 transitions. Word has length 28 [2021-08-06 20:48:47,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:47,244 INFO L470 AbstractCegarLoop]: Abstraction has 9943 states and 22856 transitions. [2021-08-06 20:48:47,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:47,244 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 22856 transitions. [2021-08-06 20:48:47,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:48:47,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:47,255 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:47,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-06 20:48:47,455 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 [2021-08-06 20:48:47,455 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:47,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:47,455 INFO L82 PathProgramCache]: Analyzing trace with hash 2138949308, now seen corresponding path program 69 times [2021-08-06 20:48:47,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:47,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672693744] [2021-08-06 20:48:47,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:47,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:47,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:47,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:47,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672693744] [2021-08-06 20:48:47,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672693744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:47,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954278769] [2021-08-06 20:48:47,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:48:47,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:47,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:47,560 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) [2021-08-06 20:48:47,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 20:48:50,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:48:50,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:50,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:48:50,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:50,322 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:50,323 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:50,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954278769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:50,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:50,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-06 20:48:50,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296359138] [2021-08-06 20:48:50,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:48:50,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:50,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:48:50,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:48:50,359 INFO L87 Difference]: Start difference. First operand 9943 states and 22856 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:50,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:50,602 INFO L93 Difference]: Finished difference Result 10119 states and 23214 transitions. [2021-08-06 20:48:50,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:48:50,602 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:48:50,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:50,616 INFO L225 Difference]: With dead ends: 10119 [2021-08-06 20:48:50,616 INFO L226 Difference]: Without dead ends: 10119 [2021-08-06 20:48:50,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:48:50,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10119 states. [2021-08-06 20:48:50,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10119 to 9932. [2021-08-06 20:48:50,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9932 states, 9931 states have (on average 2.299063538415064) internal successors, (22832), 9931 states have internal predecessors, (22832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:50,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9932 states to 9932 states and 22832 transitions. [2021-08-06 20:48:50,746 INFO L78 Accepts]: Start accepts. Automaton has 9932 states and 22832 transitions. Word has length 28 [2021-08-06 20:48:50,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:50,746 INFO L470 AbstractCegarLoop]: Abstraction has 9932 states and 22832 transitions. [2021-08-06 20:48:50,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:50,746 INFO L276 IsEmpty]: Start isEmpty. Operand 9932 states and 22832 transitions. [2021-08-06 20:48:50,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:48:50,756 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:50,757 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:50,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-06 20:48:50,957 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 [2021-08-06 20:48:50,957 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:50,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:50,957 INFO L82 PathProgramCache]: Analyzing trace with hash -424171844, now seen corresponding path program 70 times [2021-08-06 20:48:50,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:50,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468564619] [2021-08-06 20:48:50,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:50,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:51,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:51,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468564619] [2021-08-06 20:48:51,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468564619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:51,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820413832] [2021-08-06 20:48:51,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:48:51,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:51,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:51,053 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) [2021-08-06 20:48:51,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 20:48:53,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:48:53,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:53,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:48:53,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:53,855 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:53,856 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:48:53,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:53,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820413832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:53,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:53,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-06 20:48:53,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451030532] [2021-08-06 20:48:53,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:48:53,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:53,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:48:53,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:48:53,892 INFO L87 Difference]: Start difference. First operand 9932 states and 22832 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:54,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:54,151 INFO L93 Difference]: Finished difference Result 10259 states and 23482 transitions. [2021-08-06 20:48:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:48:54,151 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:48:54,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:54,169 INFO L225 Difference]: With dead ends: 10259 [2021-08-06 20:48:54,169 INFO L226 Difference]: Without dead ends: 10259 [2021-08-06 20:48:54,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:48:54,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10259 states. [2021-08-06 20:48:54,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10259 to 9925. [2021-08-06 20:48:54,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9925 states, 9924 states have (on average 2.298669891172914) internal successors, (22812), 9924 states have internal predecessors, (22812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9925 states to 9925 states and 22812 transitions. [2021-08-06 20:48:54,313 INFO L78 Accepts]: Start accepts. Automaton has 9925 states and 22812 transitions. Word has length 28 [2021-08-06 20:48:54,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:54,313 INFO L470 AbstractCegarLoop]: Abstraction has 9925 states and 22812 transitions. [2021-08-06 20:48:54,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:54,313 INFO L276 IsEmpty]: Start isEmpty. Operand 9925 states and 22812 transitions. [2021-08-06 20:48:54,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:48:54,324 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:54,324 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:54,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-06 20:48:54,524 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 [2021-08-06 20:48:54,524 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:54,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:54,524 INFO L82 PathProgramCache]: Analyzing trace with hash -510371878, now seen corresponding path program 71 times [2021-08-06 20:48:54,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:54,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182105611] [2021-08-06 20:48:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:54,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:54,644 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:48:54,652 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:48:54,743 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 90.4 percent of original size [2021-08-06 20:48:54,745 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 90.4 percent of original size [2021-08-06 20:48:54,827 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:48:54,828 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:48:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:54,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:54,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182105611] [2021-08-06 20:48:54,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182105611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:54,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637424793] [2021-08-06 20:48:54,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:48:54,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:54,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:54,844 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) [2021-08-06 20:48:54,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 20:48:57,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:48:57,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:57,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:48:57,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:58,307 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:48:58,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 27 [2021-08-06 20:48:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:58,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637424793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:58,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:58,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:48:58,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172984068] [2021-08-06 20:48:58,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:48:58,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:58,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:48:58,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:48:58,372 INFO L87 Difference]: Start difference. First operand 9925 states and 22812 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:59,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:59,668 INFO L93 Difference]: Finished difference Result 10424 states and 23686 transitions. [2021-08-06 20:48:59,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:48:59,668 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:48:59,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:59,684 INFO L225 Difference]: With dead ends: 10424 [2021-08-06 20:48:59,684 INFO L226 Difference]: Without dead ends: 10414 [2021-08-06 20:48:59,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1243.7ms TimeCoverageRelationStatistics Valid=270, Invalid=1212, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:48:59,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10414 states. [2021-08-06 20:48:59,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10414 to 9982. [2021-08-06 20:48:59,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9982 states, 9981 states have (on average 2.2993688007213704) internal successors, (22950), 9981 states have internal predecessors, (22950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:59,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9982 states to 9982 states and 22950 transitions. [2021-08-06 20:48:59,826 INFO L78 Accepts]: Start accepts. Automaton has 9982 states and 22950 transitions. Word has length 30 [2021-08-06 20:48:59,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:59,826 INFO L470 AbstractCegarLoop]: Abstraction has 9982 states and 22950 transitions. [2021-08-06 20:48:59,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:59,826 INFO L276 IsEmpty]: Start isEmpty. Operand 9982 states and 22950 transitions. [2021-08-06 20:48:59,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:48:59,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:59,837 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:59,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-06 20:49:00,037 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 [2021-08-06 20:49:00,038 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:00,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:00,038 INFO L82 PathProgramCache]: Analyzing trace with hash -256582754, now seen corresponding path program 72 times [2021-08-06 20:49:00,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:00,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883610703] [2021-08-06 20:49:00,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:00,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:00,199 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:49:00,207 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:49:00,299 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 90.4 percent of original size [2021-08-06 20:49:00,301 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 90.4 percent of original size [2021-08-06 20:49:00,380 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:49:00,381 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:49:00,396 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:00,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:00,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883610703] [2021-08-06 20:49:00,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883610703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:00,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140348073] [2021-08-06 20:49:00,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:49:00,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:00,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:00,397 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) [2021-08-06 20:49:00,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 20:49:03,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:49:03,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:03,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:49:03,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:03,838 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:49:03,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 27 [2021-08-06 20:49:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:03,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140348073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:03,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:03,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:49:03,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987806064] [2021-08-06 20:49:03,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:49:03,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:03,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:49:03,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:49:03,919 INFO L87 Difference]: Start difference. First operand 9982 states and 22950 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-06 20:49:05,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:05,375 INFO L93 Difference]: Finished difference Result 10435 states and 23710 transitions. [2021-08-06 20:49:05,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:49:05,375 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-08-06 20:49:05,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:05,390 INFO L225 Difference]: With dead ends: 10435 [2021-08-06 20:49:05,390 INFO L226 Difference]: Without dead ends: 10425 [2021-08-06 20:49:05,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1254.5ms TimeCoverageRelationStatistics Valid=300, Invalid=1422, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:49:05,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10425 states. [2021-08-06 20:49:05,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10425 to 9986. [2021-08-06 20:49:05,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9986 states, 9985 states have (on average 2.299449173760641) internal successors, (22960), 9985 states have internal predecessors, (22960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:05,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9986 states to 9986 states and 22960 transitions. [2021-08-06 20:49:05,532 INFO L78 Accepts]: Start accepts. Automaton has 9986 states and 22960 transitions. Word has length 30 [2021-08-06 20:49:05,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:05,532 INFO L470 AbstractCegarLoop]: Abstraction has 9986 states and 22960 transitions. [2021-08-06 20:49:05,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-06 20:49:05,533 INFO L276 IsEmpty]: Start isEmpty. Operand 9986 states and 22960 transitions. [2021-08-06 20:49:05,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:49:05,543 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:05,543 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:49:05,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-06 20:49:05,744 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 [2021-08-06 20:49:05,744 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:05,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:05,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1934847834, now seen corresponding path program 73 times [2021-08-06 20:49:05,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:05,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508615414] [2021-08-06 20:49:05,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:05,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:05,817 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 63, result has 51.5 percent of original size [2021-08-06 20:49:05,824 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 63, result has 51.5 percent of original size [2021-08-06 20:49:05,865 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 77.0 percent of original size [2021-08-06 20:49:05,869 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 77.0 percent of original size [2021-08-06 20:49:05,904 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 78.8 percent of original size [2021-08-06 20:49:05,908 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 78.8 percent of original size [2021-08-06 20:49:05,948 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 70.2 percent of original size [2021-08-06 20:49:05,953 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 70.2 percent of original size [2021-08-06 20:49:05,995 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 68.7 percent of original size [2021-08-06 20:49:05,998 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 68.7 percent of original size [2021-08-06 20:49:06,030 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 75.4 percent of original size [2021-08-06 20:49:06,033 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 75.4 percent of original size [2021-08-06 20:49:06,081 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:49:06,083 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:49:06,102 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:49:06,103 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:49:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:06,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:06,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508615414] [2021-08-06 20:49:06,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508615414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:06,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928568158] [2021-08-06 20:49:06,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:49:06,120 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:06,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:06,121 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) [2021-08-06 20:49:06,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 20:49:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:08,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:49:08,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:09,556 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 20:49:09,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 20:49:09,621 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:09,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928568158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:09,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:09,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-08-06 20:49:09,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912662736] [2021-08-06 20:49:09,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:49:09,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:09,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:49:09,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:49:09,622 INFO L87 Difference]: Start difference. First operand 9986 states and 22960 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:12,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:12,034 INFO L93 Difference]: Finished difference Result 10920 states and 24561 transitions. [2021-08-06 20:49:12,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 20:49:12,035 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:49:12,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:12,050 INFO L225 Difference]: With dead ends: 10920 [2021-08-06 20:49:12,050 INFO L226 Difference]: Without dead ends: 10915 [2021-08-06 20:49:12,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 2369.5ms TimeCoverageRelationStatistics Valid=350, Invalid=2302, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 20:49:12,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10915 states. [2021-08-06 20:49:12,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10915 to 10000. [2021-08-06 20:49:12,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10000 states, 9999 states have (on average 2.3000300030003) internal successors, (22998), 9999 states have internal predecessors, (22998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:12,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10000 states to 10000 states and 22998 transitions. [2021-08-06 20:49:12,186 INFO L78 Accepts]: Start accepts. Automaton has 10000 states and 22998 transitions. Word has length 30 [2021-08-06 20:49:12,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:12,187 INFO L470 AbstractCegarLoop]: Abstraction has 10000 states and 22998 transitions. [2021-08-06 20:49:12,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:12,187 INFO L276 IsEmpty]: Start isEmpty. Operand 10000 states and 22998 transitions. [2021-08-06 20:49:12,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:49:12,197 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:12,197 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:49:12,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-06 20:49:12,398 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 [2021-08-06 20:49:12,398 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:12,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:12,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1019744218, now seen corresponding path program 74 times [2021-08-06 20:49:12,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:12,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151172276] [2021-08-06 20:49:12,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:12,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:12,565 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:49:12,573 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:49:12,664 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 90.4 percent of original size [2021-08-06 20:49:12,666 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 90.4 percent of original size [2021-08-06 20:49:12,746 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:49:12,746 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:49:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:12,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:12,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151172276] [2021-08-06 20:49:12,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151172276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:12,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201254418] [2021-08-06 20:49:12,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:49:12,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:12,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:12,762 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) [2021-08-06 20:49:12,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 20:49:15,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:49:15,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:15,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:49:15,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:16,352 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-08-06 20:49:16,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 94 [2021-08-06 20:49:16,390 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 66.7 percent of original size [2021-08-06 20:49:16,459 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 66.7 percent of original size [2021-08-06 20:49:16,634 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 30.8 percent of original size [2021-08-06 20:49:16,635 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 30.8 percent of original size [2021-08-06 20:49:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:16,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201254418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:16,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:16,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-06 20:49:16,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754979020] [2021-08-06 20:49:16,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:49:16,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:16,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:49:16,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:49:16,692 INFO L87 Difference]: Start difference. First operand 10000 states and 22998 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:21,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:21,266 INFO L93 Difference]: Finished difference Result 10467 states and 23769 transitions. [2021-08-06 20:49:21,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:49:21,267 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:49:21,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:21,281 INFO L225 Difference]: With dead ends: 10467 [2021-08-06 20:49:21,281 INFO L226 Difference]: Without dead ends: 10457 [2021-08-06 20:49:21,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 2436.3ms TimeCoverageRelationStatistics Valid=387, Invalid=2475, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 20:49:21,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10457 states. [2021-08-06 20:49:21,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10457 to 10004. [2021-08-06 20:49:21,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10004 states, 10003 states have (on average 2.2997100869739078) internal successors, (23004), 10003 states have internal predecessors, (23004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:21,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10004 states to 10004 states and 23004 transitions. [2021-08-06 20:49:21,418 INFO L78 Accepts]: Start accepts. Automaton has 10004 states and 23004 transitions. Word has length 30 [2021-08-06 20:49:21,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:21,418 INFO L470 AbstractCegarLoop]: Abstraction has 10004 states and 23004 transitions. [2021-08-06 20:49:21,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:21,418 INFO L276 IsEmpty]: Start isEmpty. Operand 10004 states and 23004 transitions. [2021-08-06 20:49:21,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:49:21,429 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:21,429 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:49:21,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-06 20:49:21,629 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 [2021-08-06 20:49:21,630 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:21,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:21,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1167653030, now seen corresponding path program 75 times [2021-08-06 20:49:21,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:21,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261985624] [2021-08-06 20:49:21,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:21,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:21,718 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 63, result has 51.5 percent of original size [2021-08-06 20:49:21,727 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 63, result has 51.5 percent of original size [2021-08-06 20:49:21,781 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 77.0 percent of original size [2021-08-06 20:49:21,786 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 77.0 percent of original size [2021-08-06 20:49:21,827 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 78.8 percent of original size [2021-08-06 20:49:21,831 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 78.8 percent of original size [2021-08-06 20:49:21,878 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 70.2 percent of original size [2021-08-06 20:49:21,883 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 70.2 percent of original size [2021-08-06 20:49:21,931 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 68.7 percent of original size [2021-08-06 20:49:21,934 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 68.7 percent of original size [2021-08-06 20:49:21,971 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 82.4 percent of original size [2021-08-06 20:49:21,973 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 82.4 percent of original size [2021-08-06 20:49:22,087 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:49:22,089 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:49:22,110 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:49:22,111 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:49:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:22,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:22,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261985624] [2021-08-06 20:49:22,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261985624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:22,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283532042] [2021-08-06 20:49:22,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:49:22,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:22,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:22,132 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) [2021-08-06 20:49:22,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 20:49:24,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:49:24,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:24,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 20:49:24,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:25,951 INFO L354 Elim1Store]: treesize reduction 35, result has 56.8 percent of original size [2021-08-06 20:49:25,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 43 treesize of output 74 [2021-08-06 20:49:26,395 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 51, result has 45.2 percent of original size [2021-08-06 20:49:26,399 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 51, result has 45.2 percent of original size [2021-08-06 20:49:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:26,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283532042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:26,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:26,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 25 [2021-08-06 20:49:26,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266892488] [2021-08-06 20:49:26,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:49:26,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:26,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:49:26,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:49:26,488 INFO L87 Difference]: Start difference. First operand 10004 states and 23004 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:30,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:30,993 INFO L93 Difference]: Finished difference Result 11394 states and 25280 transitions. [2021-08-06 20:49:30,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-06 20:49:30,993 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:49:30,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:31,009 INFO L225 Difference]: With dead ends: 11394 [2021-08-06 20:49:31,009 INFO L226 Difference]: Without dead ends: 11384 [2021-08-06 20:49:31,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 4209.3ms TimeCoverageRelationStatistics Valid=510, Invalid=4046, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 20:49:31,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11384 states. [2021-08-06 20:49:31,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11384 to 10010. [2021-08-06 20:49:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10010 states, 10009 states have (on average 2.2996303327005694) internal successors, (23017), 10009 states have internal predecessors, (23017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:31,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10010 states to 10010 states and 23017 transitions. [2021-08-06 20:49:31,156 INFO L78 Accepts]: Start accepts. Automaton has 10010 states and 23017 transitions. Word has length 30 [2021-08-06 20:49:31,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:31,157 INFO L470 AbstractCegarLoop]: Abstraction has 10010 states and 23017 transitions. [2021-08-06 20:49:31,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:31,157 INFO L276 IsEmpty]: Start isEmpty. Operand 10010 states and 23017 transitions. [2021-08-06 20:49:31,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:49:31,167 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:31,167 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:49:31,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-06 20:49:31,368 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 [2021-08-06 20:49:31,368 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:31,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1635819354, now seen corresponding path program 76 times [2021-08-06 20:49:31,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:31,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926667599] [2021-08-06 20:49:31,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:31,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:31,657 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:49:31,658 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:49:31,681 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:49:31,682 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:49:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:31,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:31,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926667599] [2021-08-06 20:49:31,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926667599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:31,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814316434] [2021-08-06 20:49:31,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:49:31,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:31,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:31,714 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) [2021-08-06 20:49:31,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 20:49:34,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:49:34,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:34,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:49:34,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:35,764 INFO L354 Elim1Store]: treesize reduction 74, result has 8.6 percent of original size [2021-08-06 20:49:35,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 42 [2021-08-06 20:49:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:35,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814316434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:35,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:35,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:49:35,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320784519] [2021-08-06 20:49:35,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:49:35,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:35,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:49:35,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:49:35,860 INFO L87 Difference]: Start difference. First operand 10010 states and 23017 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:38,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:38,807 INFO L93 Difference]: Finished difference Result 12963 states and 29663 transitions. [2021-08-06 20:49:38,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 20:49:38,808 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:49:38,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:38,826 INFO L225 Difference]: With dead ends: 12963 [2021-08-06 20:49:38,826 INFO L226 Difference]: Without dead ends: 12958 [2021-08-06 20:49:38,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 2637.9ms TimeCoverageRelationStatistics Valid=333, Invalid=2747, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 20:49:38,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12958 states. [2021-08-06 20:49:38,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12958 to 10054. [2021-08-06 20:49:38,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10054 states, 10053 states have (on average 2.29762260021884) internal successors, (23098), 10053 states have internal predecessors, (23098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:38,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10054 states to 10054 states and 23098 transitions. [2021-08-06 20:49:38,983 INFO L78 Accepts]: Start accepts. Automaton has 10054 states and 23098 transitions. Word has length 30 [2021-08-06 20:49:38,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:38,983 INFO L470 AbstractCegarLoop]: Abstraction has 10054 states and 23098 transitions. [2021-08-06 20:49:38,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:38,983 INFO L276 IsEmpty]: Start isEmpty. Operand 10054 states and 23098 transitions. [2021-08-06 20:49:38,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:49:38,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:38,994 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:49:39,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-06 20:49:39,194 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 [2021-08-06 20:49:39,195 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:39,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:39,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1094509922, now seen corresponding path program 77 times [2021-08-06 20:49:39,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:39,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179249121] [2021-08-06 20:49:39,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:39,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:39,356 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:49:39,364 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:49:39,503 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 90.4 percent of original size [2021-08-06 20:49:39,505 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 90.4 percent of original size [2021-08-06 20:49:39,535 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 88.9 percent of original size [2021-08-06 20:49:39,537 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 88.9 percent of original size [2021-08-06 20:49:39,603 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:49:39,604 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:49:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:39,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:39,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179249121] [2021-08-06 20:49:39,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179249121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:39,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494439561] [2021-08-06 20:49:39,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:49:39,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:39,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:39,625 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) [2021-08-06 20:49:39,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 20:49:42,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:49:42,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:42,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:49:42,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:43,490 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-08-06 20:49:43,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 56 [2021-08-06 20:49:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:43,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494439561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:43,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:43,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:49:43,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840075736] [2021-08-06 20:49:43,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:49:43,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:43,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:49:43,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:49:43,579 INFO L87 Difference]: Start difference. First operand 10054 states and 23098 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-06 20:49:45,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:45,265 INFO L93 Difference]: Finished difference Result 10609 states and 24021 transitions. [2021-08-06 20:49:45,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:49:45,265 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-08-06 20:49:45,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:45,279 INFO L225 Difference]: With dead ends: 10609 [2021-08-06 20:49:45,279 INFO L226 Difference]: Without dead ends: 10604 [2021-08-06 20:49:45,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1629.2ms TimeCoverageRelationStatistics Valid=335, Invalid=1557, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:49:45,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10604 states. [2021-08-06 20:49:45,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10604 to 10108. [2021-08-06 20:49:45,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10108 states, 10107 states have (on average 2.296032452755516) internal successors, (23206), 10107 states have internal predecessors, (23206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:45,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10108 states to 10108 states and 23206 transitions. [2021-08-06 20:49:45,424 INFO L78 Accepts]: Start accepts. Automaton has 10108 states and 23206 transitions. Word has length 30 [2021-08-06 20:49:45,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:45,424 INFO L470 AbstractCegarLoop]: Abstraction has 10108 states and 23206 transitions. [2021-08-06 20:49:45,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-06 20:49:45,424 INFO L276 IsEmpty]: Start isEmpty. Operand 10108 states and 23206 transitions. [2021-08-06 20:49:45,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:49:45,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:45,435 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:49:45,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-06 20:49:45,635 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 [2021-08-06 20:49:45,635 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:45,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:45,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1013060126, now seen corresponding path program 78 times [2021-08-06 20:49:45,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:45,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471097036] [2021-08-06 20:49:45,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:45,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:45,717 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 63, result has 51.5 percent of original size [2021-08-06 20:49:45,726 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 63, result has 51.5 percent of original size [2021-08-06 20:49:45,773 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 76.3 percent of original size [2021-08-06 20:49:45,776 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 76.3 percent of original size [2021-08-06 20:49:45,813 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 78.8 percent of original size [2021-08-06 20:49:45,817 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 78.8 percent of original size [2021-08-06 20:49:45,864 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 69.6 percent of original size [2021-08-06 20:49:45,868 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 69.6 percent of original size [2021-08-06 20:49:45,913 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 69.8 percent of original size [2021-08-06 20:49:45,915 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 69.8 percent of original size [2021-08-06 20:49:45,949 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 82.4 percent of original size [2021-08-06 20:49:45,951 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 82.4 percent of original size [2021-08-06 20:49:46,066 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:49:46,067 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:49:46,089 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:49:46,090 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:49:46,109 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:46,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:46,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471097036] [2021-08-06 20:49:46,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471097036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:46,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828622075] [2021-08-06 20:49:46,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:49:46,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:46,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:46,110 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) [2021-08-06 20:49:46,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 20:49:49,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:49:49,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:49,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:49:49,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:49,901 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 20:49:49,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 20:49:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:49,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828622075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:49,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:49,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:49:49,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435347970] [2021-08-06 20:49:49,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:49:49,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:49,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:49:49,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:49:49,983 INFO L87 Difference]: Start difference. First operand 10108 states and 23206 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:52,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:52,915 INFO L93 Difference]: Finished difference Result 11066 states and 24843 transitions. [2021-08-06 20:49:52,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 20:49:52,915 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:49:52,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:52,931 INFO L225 Difference]: With dead ends: 11066 [2021-08-06 20:49:52,931 INFO L226 Difference]: Without dead ends: 11061 [2021-08-06 20:49:52,931 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2861.5ms TimeCoverageRelationStatistics Valid=425, Invalid=2767, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 20:49:52,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11061 states. [2021-08-06 20:49:53,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11061 to 10120. [2021-08-06 20:49:53,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10120 states, 10119 states have (on average 2.2954837434529103) internal successors, (23228), 10119 states have internal predecessors, (23228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:53,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 23228 transitions. [2021-08-06 20:49:53,078 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 23228 transitions. Word has length 30 [2021-08-06 20:49:53,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:53,078 INFO L470 AbstractCegarLoop]: Abstraction has 10120 states and 23228 transitions. [2021-08-06 20:49:53,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:53,078 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 23228 transitions. [2021-08-06 20:49:53,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:49:53,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:53,088 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:49:53,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-06 20:49:53,289 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 [2021-08-06 20:49:53,289 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:53,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:53,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1266849250, now seen corresponding path program 79 times [2021-08-06 20:49:53,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:53,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894138301] [2021-08-06 20:49:53,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:53,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:53,634 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:49:53,635 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:49:53,659 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:49:53,660 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:49:53,681 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:53,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:53,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894138301] [2021-08-06 20:49:53,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894138301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:53,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765022298] [2021-08-06 20:49:53,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:49:53,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:53,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:53,682 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) [2021-08-06 20:49:53,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 20:49:56,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:56,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 20:49:56,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:57,583 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 20:49:57,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 20:49:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:57,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765022298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:57,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:57,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:49:57,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760866414] [2021-08-06 20:49:57,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:49:57,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:57,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:49:57,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:49:57,672 INFO L87 Difference]: Start difference. First operand 10120 states and 23228 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:00,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:00,765 INFO L93 Difference]: Finished difference Result 13038 states and 29815 transitions. [2021-08-06 20:50:00,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 20:50:00,766 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:50:00,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:00,785 INFO L225 Difference]: With dead ends: 13038 [2021-08-06 20:50:00,785 INFO L226 Difference]: Without dead ends: 13028 [2021-08-06 20:50:00,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 2895.6ms TimeCoverageRelationStatistics Valid=413, Invalid=3009, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 20:50:00,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13028 states. [2021-08-06 20:50:00,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13028 to 10138. [2021-08-06 20:50:00,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10138 states, 10137 states have (on average 2.294367169774095) internal successors, (23258), 10137 states have internal predecessors, (23258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:00,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10138 states to 10138 states and 23258 transitions. [2021-08-06 20:50:00,939 INFO L78 Accepts]: Start accepts. Automaton has 10138 states and 23258 transitions. Word has length 30 [2021-08-06 20:50:00,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:00,939 INFO L470 AbstractCegarLoop]: Abstraction has 10138 states and 23258 transitions. [2021-08-06 20:50:00,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:00,939 INFO L276 IsEmpty]: Start isEmpty. Operand 10138 states and 23258 transitions. [2021-08-06 20:50:00,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:50:00,951 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:00,951 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:50:00,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-06 20:50:01,152 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 [2021-08-06 20:50:01,152 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:01,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:01,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1851087142, now seen corresponding path program 29 times [2021-08-06 20:50:01,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:01,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561767194] [2021-08-06 20:50:01,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:01,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:01,272 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 55, result has 36.8 percent of original size [2021-08-06 20:50:01,277 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 55, result has 36.8 percent of original size [2021-08-06 20:50:01,313 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 58.6 percent of original size [2021-08-06 20:50:01,322 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 58.6 percent of original size [2021-08-06 20:50:01,449 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 51, result has 60.2 percent of original size [2021-08-06 20:50:01,461 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 51, result has 60.2 percent of original size [2021-08-06 20:50:01,542 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 49, result has 65.0 percent of original size [2021-08-06 20:50:01,557 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 49, result has 65.0 percent of original size [2021-08-06 20:50:01,635 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 74, result has 54.0 percent of original size [2021-08-06 20:50:01,652 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 74, result has 54.0 percent of original size [2021-08-06 20:50:01,718 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 60, result has 54.5 percent of original size [2021-08-06 20:50:01,725 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 60, result has 54.5 percent of original size [2021-08-06 20:50:01,775 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 76.7 percent of original size [2021-08-06 20:50:01,778 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 76.7 percent of original size [2021-08-06 20:50:01,841 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 76.9 percent of original size [2021-08-06 20:50:01,843 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 76.9 percent of original size [2021-08-06 20:50:01,875 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 72.7 percent of original size [2021-08-06 20:50:01,876 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 72.7 percent of original size [2021-08-06 20:50:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:01,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:01,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561767194] [2021-08-06 20:50:01,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561767194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:01,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620691015] [2021-08-06 20:50:01,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:50:01,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:01,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:01,905 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) [2021-08-06 20:50:01,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 20:50:05,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:50:05,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:50:05,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:50:05,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:05,764 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-06 20:50:05,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 35 treesize of output 28 [2021-08-06 20:50:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:05,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620691015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:05,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:05,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 20:50:05,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304728572] [2021-08-06 20:50:05,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:50:05,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:05,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:50:05,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:50:05,854 INFO L87 Difference]: Start difference. First operand 10138 states and 23258 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:08,764 INFO L93 Difference]: Finished difference Result 10211 states and 23355 transitions. [2021-08-06 20:50:08,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 20:50:08,765 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:50:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:08,778 INFO L225 Difference]: With dead ends: 10211 [2021-08-06 20:50:08,778 INFO L226 Difference]: Without dead ends: 10206 [2021-08-06 20:50:08,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 2738.7ms TimeCoverageRelationStatistics Valid=338, Invalid=2314, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 20:50:08,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10206 states. [2021-08-06 20:50:08,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10206 to 10134. [2021-08-06 20:50:08,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10134 states, 10133 states have (on average 2.2944833711635253) internal successors, (23250), 10133 states have internal predecessors, (23250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:08,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10134 states to 10134 states and 23250 transitions. [2021-08-06 20:50:08,904 INFO L78 Accepts]: Start accepts. Automaton has 10134 states and 23250 transitions. Word has length 30 [2021-08-06 20:50:08,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:08,905 INFO L470 AbstractCegarLoop]: Abstraction has 10134 states and 23250 transitions. [2021-08-06 20:50:08,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:08,905 INFO L276 IsEmpty]: Start isEmpty. Operand 10134 states and 23250 transitions. [2021-08-06 20:50:08,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:50:08,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:08,915 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:50:08,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-06 20:50:09,116 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 [2021-08-06 20:50:09,116 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:09,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:09,116 INFO L82 PathProgramCache]: Analyzing trace with hash 2006105946, now seen corresponding path program 80 times [2021-08-06 20:50:09,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:09,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134793] [2021-08-06 20:50:09,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:09,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:09,475 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:50:09,476 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:50:09,501 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:50:09,502 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:50:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:09,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:09,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134793] [2021-08-06 20:50:09,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:09,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767011199] [2021-08-06 20:50:09,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:50:09,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:09,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:09,525 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) [2021-08-06 20:50:09,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 20:50:12,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:50:12,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:50:12,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:50:12,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:13,445 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 20:50:13,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 20:50:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:13,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767011199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:13,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:13,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:50:13,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545595570] [2021-08-06 20:50:13,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:50:13,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:13,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:50:13,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:50:13,535 INFO L87 Difference]: Start difference. First operand 10134 states and 23250 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:15,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:15,810 INFO L93 Difference]: Finished difference Result 13083 states and 29891 transitions. [2021-08-06 20:50:15,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 20:50:15,811 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:50:15,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:15,830 INFO L225 Difference]: With dead ends: 13083 [2021-08-06 20:50:15,830 INFO L226 Difference]: Without dead ends: 13078 [2021-08-06 20:50:15,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 2003.1ms TimeCoverageRelationStatistics Valid=297, Invalid=2459, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 20:50:15,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13078 states. [2021-08-06 20:50:15,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13078 to 10160. [2021-08-06 20:50:15,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10160 states, 10159 states have (on average 2.2935328280342553) internal successors, (23300), 10159 states have internal predecessors, (23300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:15,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10160 states to 10160 states and 23300 transitions. [2021-08-06 20:50:15,987 INFO L78 Accepts]: Start accepts. Automaton has 10160 states and 23300 transitions. Word has length 30 [2021-08-06 20:50:15,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:15,987 INFO L470 AbstractCegarLoop]: Abstraction has 10160 states and 23300 transitions. [2021-08-06 20:50:15,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:15,987 INFO L276 IsEmpty]: Start isEmpty. Operand 10160 states and 23300 transitions. [2021-08-06 20:50:15,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:50:15,998 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:15,998 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:50:16,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-06 20:50:16,199 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 [2021-08-06 20:50:16,199 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:16,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:16,199 INFO L82 PathProgramCache]: Analyzing trace with hash -988024870, now seen corresponding path program 81 times [2021-08-06 20:50:16,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:16,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985727207] [2021-08-06 20:50:16,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:16,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:16,364 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:50:16,371 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:50:16,566 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:50:16,567 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:50:16,583 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:16,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:16,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985727207] [2021-08-06 20:50:16,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985727207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:16,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842366439] [2021-08-06 20:50:16,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:50:16,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:16,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:16,584 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:50:16,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 20:50:19,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:50:19,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:50:19,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:50:19,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:20,719 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-08-06 20:50:20,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 94 [2021-08-06 20:50:20,758 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 56.3 percent of original size [2021-08-06 20:50:20,838 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 56.3 percent of original size [2021-08-06 20:50:20,946 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 30.8 percent of original size [2021-08-06 20:50:20,947 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 30.8 percent of original size [2021-08-06 20:50:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:21,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842366439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:21,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:21,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-06 20:50:21,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852322328] [2021-08-06 20:50:21,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:50:21,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:21,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:50:21,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:50:21,008 INFO L87 Difference]: Start difference. First operand 10160 states and 23300 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:23,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:23,913 INFO L93 Difference]: Finished difference Result 13408 states and 30428 transitions. [2021-08-06 20:50:23,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 20:50:23,914 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:50:23,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:23,931 INFO L225 Difference]: With dead ends: 13408 [2021-08-06 20:50:23,931 INFO L226 Difference]: Without dead ends: 13388 [2021-08-06 20:50:23,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 2541.3ms TimeCoverageRelationStatistics Valid=413, Invalid=2239, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 20:50:23,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13388 states. [2021-08-06 20:50:24,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13388 to 10154. [2021-08-06 20:50:24,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 2.2935093075938147) internal successors, (23286), 10153 states have internal predecessors, (23286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:24,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 23286 transitions. [2021-08-06 20:50:24,121 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 23286 transitions. Word has length 30 [2021-08-06 20:50:24,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:24,121 INFO L470 AbstractCegarLoop]: Abstraction has 10154 states and 23286 transitions. [2021-08-06 20:50:24,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:24,121 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 23286 transitions. [2021-08-06 20:50:24,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:50:24,132 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:24,132 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:50:24,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-06 20:50:24,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-06 20:50:24,333 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:24,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:24,333 INFO L82 PathProgramCache]: Analyzing trace with hash -734235746, now seen corresponding path program 82 times [2021-08-06 20:50:24,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:24,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917219121] [2021-08-06 20:50:24,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:24,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:24,451 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:50:24,458 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:50:24,717 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:50:24,718 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:50:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:24,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:24,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917219121] [2021-08-06 20:50:24,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917219121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:24,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322951043] [2021-08-06 20:50:24,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:50:24,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:24,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:24,736 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:50:24,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 20:50:27,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:50:27,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:50:27,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:50:27,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:28,866 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:50:28,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 27 [2021-08-06 20:50:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:28,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322951043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:28,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:28,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:50:28,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921057582] [2021-08-06 20:50:28,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:50:28,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:28,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:50:28,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:50:28,950 INFO L87 Difference]: Start difference. First operand 10154 states and 23286 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-06 20:50:30,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:30,868 INFO L93 Difference]: Finished difference Result 13590 states and 30779 transitions. [2021-08-06 20:50:30,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:50:30,868 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-08-06 20:50:30,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:30,887 INFO L225 Difference]: With dead ends: 13590 [2021-08-06 20:50:30,887 INFO L226 Difference]: Without dead ends: 13580 [2021-08-06 20:50:30,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1655.5ms TimeCoverageRelationStatistics Valid=437, Invalid=1819, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 20:50:30,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13580 states. [2021-08-06 20:50:31,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13580 to 10208. [2021-08-06 20:50:31,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10208 states, 10207 states have (on average 2.2944057999412166) internal successors, (23419), 10207 states have internal predecessors, (23419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:31,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10208 states to 10208 states and 23419 transitions. [2021-08-06 20:50:31,088 INFO L78 Accepts]: Start accepts. Automaton has 10208 states and 23419 transitions. Word has length 30 [2021-08-06 20:50:31,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:31,088 INFO L470 AbstractCegarLoop]: Abstraction has 10208 states and 23419 transitions. [2021-08-06 20:50:31,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-06 20:50:31,088 INFO L276 IsEmpty]: Start isEmpty. Operand 10208 states and 23419 transitions. [2021-08-06 20:50:31,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:50:31,098 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:31,098 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:50:31,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-06 20:50:31,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-06 20:50:31,301 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:31,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:31,301 INFO L82 PathProgramCache]: Analyzing trace with hash 542091226, now seen corresponding path program 83 times [2021-08-06 20:50:31,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:31,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616621497] [2021-08-06 20:50:31,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:31,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:31,469 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:50:31,477 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:50:31,670 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:50:31,671 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:50:31,686 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:31,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:31,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616621497] [2021-08-06 20:50:31,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616621497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:31,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148394721] [2021-08-06 20:50:31,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:50:31,687 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:31,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:31,688 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:50:31,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 20:50:35,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:50:35,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:50:35,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:50:35,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:35,616 INFO L354 Elim1Store]: treesize reduction 41, result has 16.3 percent of original size [2021-08-06 20:50:35,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 66 [2021-08-06 20:50:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:35,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148394721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:35,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:35,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 20:50:35,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494257631] [2021-08-06 20:50:35,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:50:35,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:35,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:50:35,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:50:35,750 INFO L87 Difference]: Start difference. First operand 10208 states and 23419 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:38,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:38,806 INFO L93 Difference]: Finished difference Result 13586 states and 30747 transitions. [2021-08-06 20:50:38,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 20:50:38,807 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:50:38,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:38,849 INFO L225 Difference]: With dead ends: 13586 [2021-08-06 20:50:38,849 INFO L226 Difference]: Without dead ends: 13576 [2021-08-06 20:50:38,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 2195.8ms TimeCoverageRelationStatistics Valid=495, Invalid=3165, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 20:50:38,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13576 states. [2021-08-06 20:50:39,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13576 to 10218. [2021-08-06 20:50:39,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10218 states, 10217 states have (on average 2.2947049035920526) internal successors, (23445), 10217 states have internal predecessors, (23445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:39,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10218 states to 10218 states and 23445 transitions. [2021-08-06 20:50:39,036 INFO L78 Accepts]: Start accepts. Automaton has 10218 states and 23445 transitions. Word has length 30 [2021-08-06 20:50:39,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:39,036 INFO L470 AbstractCegarLoop]: Abstraction has 10218 states and 23445 transitions. [2021-08-06 20:50:39,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:39,037 INFO L276 IsEmpty]: Start isEmpty. Operand 10218 states and 23445 transitions. [2021-08-06 20:50:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:50:39,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:39,048 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:50:39,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-06 20:50:39,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-06 20:50:39,248 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:39,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:39,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1158166362, now seen corresponding path program 84 times [2021-08-06 20:50:39,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:39,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252250291] [2021-08-06 20:50:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:39,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:39,562 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:50:39,563 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:50:39,586 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:50:39,586 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:50:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:39,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:39,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252250291] [2021-08-06 20:50:39,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252250291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:39,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61774450] [2021-08-06 20:50:39,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:50:39,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:39,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:39,607 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:50:39,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 20:50:43,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:50:43,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:50:43,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:50:43,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:43,982 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 20:50:43,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 20:50:44,068 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:44,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61774450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:44,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:44,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:50:44,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997028878] [2021-08-06 20:50:44,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:50:44,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:44,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:50:44,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:50:44,069 INFO L87 Difference]: Start difference. First operand 10218 states and 23445 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:47,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:47,780 INFO L93 Difference]: Finished difference Result 14593 states and 33120 transitions. [2021-08-06 20:50:47,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 20:50:47,781 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:50:47,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:47,802 INFO L225 Difference]: With dead ends: 14593 [2021-08-06 20:50:47,802 INFO L226 Difference]: Without dead ends: 14583 [2021-08-06 20:50:47,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 3308.9ms TimeCoverageRelationStatistics Valid=481, Invalid=3809, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 20:50:47,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14583 states. [2021-08-06 20:50:47,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14583 to 10237. [2021-08-06 20:50:47,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10237 states, 10236 states have (on average 2.294646346228996) internal successors, (23488), 10236 states have internal predecessors, (23488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10237 states to 10237 states and 23488 transitions. [2021-08-06 20:50:47,960 INFO L78 Accepts]: Start accepts. Automaton has 10237 states and 23488 transitions. Word has length 30 [2021-08-06 20:50:47,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:47,960 INFO L470 AbstractCegarLoop]: Abstraction has 10237 states and 23488 transitions. [2021-08-06 20:50:47,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:47,960 INFO L276 IsEmpty]: Start isEmpty. Operand 10237 states and 23488 transitions. [2021-08-06 20:50:47,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:50:47,971 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:47,971 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:50:47,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-06 20:50:48,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:48,173 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:48,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:48,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1784051750, now seen corresponding path program 85 times [2021-08-06 20:50:48,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:48,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148766534] [2021-08-06 20:50:48,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:48,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:48,284 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:50:48,288 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:50:48,459 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:50:48,460 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:50:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:48,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:48,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148766534] [2021-08-06 20:50:48,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148766534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:48,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512728549] [2021-08-06 20:50:48,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:50:48,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:48,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:48,478 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:50:48,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 20:50:51,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:51,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:50:51,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:52,837 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-08-06 20:50:52,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 56 [2021-08-06 20:50:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:52,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512728549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:52,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:52,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:50:52,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447929076] [2021-08-06 20:50:52,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:50:52,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:52,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:50:52,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:50:52,905 INFO L87 Difference]: Start difference. First operand 10237 states and 23488 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:56,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:56,050 INFO L93 Difference]: Finished difference Result 15672 states and 35265 transitions. [2021-08-06 20:50:56,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 20:50:56,050 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:50:56,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:56,075 INFO L225 Difference]: With dead ends: 15672 [2021-08-06 20:50:56,076 INFO L226 Difference]: Without dead ends: 15662 [2021-08-06 20:50:56,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 2376.7ms TimeCoverageRelationStatistics Valid=597, Invalid=2595, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 20:50:56,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15662 states. [2021-08-06 20:50:56,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15662 to 10245. [2021-08-06 20:50:56,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10245 states, 10244 states have (on average 2.2950019523623584) internal successors, (23510), 10244 states have internal predecessors, (23510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:56,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10245 states to 10245 states and 23510 transitions. [2021-08-06 20:50:56,250 INFO L78 Accepts]: Start accepts. Automaton has 10245 states and 23510 transitions. Word has length 30 [2021-08-06 20:50:56,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:56,250 INFO L470 AbstractCegarLoop]: Abstraction has 10245 states and 23510 transitions. [2021-08-06 20:50:56,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:56,250 INFO L276 IsEmpty]: Start isEmpty. Operand 10245 states and 23510 transitions. [2021-08-06 20:50:56,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:50:56,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:56,261 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:50:56,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-06 20:50:56,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:56,462 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:56,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:56,462 INFO L82 PathProgramCache]: Analyzing trace with hash 938530778, now seen corresponding path program 86 times [2021-08-06 20:50:56,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:56,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527937171] [2021-08-06 20:50:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:56,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:56,575 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:50:56,580 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:50:56,796 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:50:56,798 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:50:56,817 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:50:56,818 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:50:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:56,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:56,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527937171] [2021-08-06 20:50:56,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527937171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:56,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788823320] [2021-08-06 20:50:56,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:50:56,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:56,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:56,837 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:50:56,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 20:51:00,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:51:00,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:51:00,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:51:00,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:51:01,007 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 20:51:01,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 55 [2021-08-06 20:51:01,100 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 55.6 percent of original size [2021-08-06 20:51:01,102 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 55.6 percent of original size [2021-08-06 20:51:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:01,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788823320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:01,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:51:01,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:51:01,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571027187] [2021-08-06 20:51:01,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:51:01,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:51:01,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:51:01,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:51:01,198 INFO L87 Difference]: Start difference. First operand 10245 states and 23510 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:04,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:51:04,988 INFO L93 Difference]: Finished difference Result 16824 states and 37742 transitions. [2021-08-06 20:51:04,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 20:51:04,988 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:51:04,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:51:05,016 INFO L225 Difference]: With dead ends: 16824 [2021-08-06 20:51:05,016 INFO L226 Difference]: Without dead ends: 16814 [2021-08-06 20:51:05,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 3218.6ms TimeCoverageRelationStatistics Valid=920, Invalid=3910, Unknown=0, NotChecked=0, Total=4830 [2021-08-06 20:51:05,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16814 states. [2021-08-06 20:51:05,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16814 to 10249. [2021-08-06 20:51:05,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10249 states, 10248 states have (on average 2.2950819672131146) internal successors, (23520), 10248 states have internal predecessors, (23520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:05,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10249 states to 10249 states and 23520 transitions. [2021-08-06 20:51:05,201 INFO L78 Accepts]: Start accepts. Automaton has 10249 states and 23520 transitions. Word has length 30 [2021-08-06 20:51:05,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:51:05,201 INFO L470 AbstractCegarLoop]: Abstraction has 10249 states and 23520 transitions. [2021-08-06 20:51:05,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:05,201 INFO L276 IsEmpty]: Start isEmpty. Operand 10249 states and 23520 transitions. [2021-08-06 20:51:05,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:51:05,212 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:51:05,212 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:51:05,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-06 20:51:05,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-08-06 20:51:05,412 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:51:05,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:51:05,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1175723362, now seen corresponding path program 87 times [2021-08-06 20:51:05,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:51:05,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634675900] [2021-08-06 20:51:05,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:51:05,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:51:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:05,534 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:51:05,539 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:51:05,687 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:51:05,688 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:51:05,707 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:51:05,708 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:51:05,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:05,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:51:05,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634675900] [2021-08-06 20:51:05,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634675900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:05,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073627218] [2021-08-06 20:51:05,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:51:05,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:05,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:51:05,726 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:51:05,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 20:51:09,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:51:09,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:51:09,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:51:09,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:51:09,947 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-08-06 20:51:09,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 94 [2021-08-06 20:51:10,534 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 33, result has 64.1 percent of original size [2021-08-06 20:51:10,545 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 33, result has 64.1 percent of original size [2021-08-06 20:51:10,743 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 30.8 percent of original size [2021-08-06 20:51:10,745 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 30.8 percent of original size [2021-08-06 20:51:10,810 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:10,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073627218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:10,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:51:10,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-06 20:51:10,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283445710] [2021-08-06 20:51:10,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:51:10,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:51:10,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:51:10,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:51:10,811 INFO L87 Difference]: Start difference. First operand 10249 states and 23520 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:16,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:51:16,726 INFO L93 Difference]: Finished difference Result 16717 states and 37699 transitions. [2021-08-06 20:51:16,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 20:51:16,726 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:51:16,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:51:16,753 INFO L225 Difference]: With dead ends: 16717 [2021-08-06 20:51:16,753 INFO L226 Difference]: Without dead ends: 16712 [2021-08-06 20:51:16,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2044 ImplicationChecksByTransitivity, 5117.0ms TimeCoverageRelationStatistics Valid=992, Invalid=5170, Unknown=0, NotChecked=0, Total=6162 [2021-08-06 20:51:16,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16712 states. [2021-08-06 20:51:16,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16712 to 10245. [2021-08-06 20:51:16,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10245 states, 10244 states have (on average 2.294806716126513) internal successors, (23508), 10244 states have internal predecessors, (23508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:16,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10245 states to 10245 states and 23508 transitions. [2021-08-06 20:51:16,933 INFO L78 Accepts]: Start accepts. Automaton has 10245 states and 23508 transitions. Word has length 30 [2021-08-06 20:51:16,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:51:16,933 INFO L470 AbstractCegarLoop]: Abstraction has 10245 states and 23508 transitions. [2021-08-06 20:51:16,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:16,933 INFO L276 IsEmpty]: Start isEmpty. Operand 10245 states and 23508 transitions. [2021-08-06 20:51:16,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:51:16,944 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:51:16,944 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:51:16,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-06 20:51:17,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:17,145 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:51:17,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:51:17,145 INFO L82 PathProgramCache]: Analyzing trace with hash 732426074, now seen corresponding path program 88 times [2021-08-06 20:51:17,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:51:17,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196311606] [2021-08-06 20:51:17,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:51:17,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:51:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:17,420 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:51:17,422 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:51:17,443 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:51:17,444 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:51:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:17,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:51:17,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196311606] [2021-08-06 20:51:17,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196311606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:17,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948938716] [2021-08-06 20:51:17,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:51:17,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:17,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:51:17,464 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:51:17,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 20:51:21,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:51:21,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:51:21,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:51:21,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:51:22,090 INFO L354 Elim1Store]: treesize reduction 74, result has 8.6 percent of original size [2021-08-06 20:51:22,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 42 [2021-08-06 20:51:22,175 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:22,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948938716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:22,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:51:22,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:51:22,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605311687] [2021-08-06 20:51:22,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:51:22,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:51:22,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:51:22,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:51:22,176 INFO L87 Difference]: Start difference. First operand 10245 states and 23508 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:27,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:51:27,262 INFO L93 Difference]: Finished difference Result 15814 states and 35712 transitions. [2021-08-06 20:51:27,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-06 20:51:27,262 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:51:27,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:51:27,288 INFO L225 Difference]: With dead ends: 15814 [2021-08-06 20:51:27,288 INFO L226 Difference]: Without dead ends: 15799 [2021-08-06 20:51:27,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 4192.6ms TimeCoverageRelationStatistics Valid=721, Invalid=4681, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 20:51:27,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15799 states. [2021-08-06 20:51:27,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15799 to 10263. [2021-08-06 20:51:27,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10263 states, 10262 states have (on average 2.2952640810758136) internal successors, (23554), 10262 states have internal predecessors, (23554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:27,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10263 states to 10263 states and 23554 transitions. [2021-08-06 20:51:27,515 INFO L78 Accepts]: Start accepts. Automaton has 10263 states and 23554 transitions. Word has length 30 [2021-08-06 20:51:27,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:51:27,515 INFO L470 AbstractCegarLoop]: Abstraction has 10263 states and 23554 transitions. [2021-08-06 20:51:27,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:27,515 INFO L276 IsEmpty]: Start isEmpty. Operand 10263 states and 23554 transitions. [2021-08-06 20:51:27,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:51:27,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:51:27,526 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:51:27,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-06 20:51:27,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:27,727 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:51:27,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:51:27,728 INFO L82 PathProgramCache]: Analyzing trace with hash 651536218, now seen corresponding path program 89 times [2021-08-06 20:51:27,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:51:27,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31914190] [2021-08-06 20:51:27,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:51:27,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:51:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:28,064 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:51:28,066 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:51:28,098 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:51:28,100 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:51:28,129 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:51:28,130 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:51:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:28,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:51:28,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31914190] [2021-08-06 20:51:28,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31914190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:28,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655197138] [2021-08-06 20:51:28,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:51:28,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:28,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:51:28,157 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:51:28,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 20:51:31,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:51:31,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:51:31,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:51:31,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:51:32,549 INFO L354 Elim1Store]: treesize reduction 32, result has 56.2 percent of original size [2021-08-06 20:51:32,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 46 treesize of output 74 [2021-08-06 20:51:32,816 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 69.6 percent of original size [2021-08-06 20:51:32,819 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 69.6 percent of original size [2021-08-06 20:51:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:32,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655197138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:32,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:51:32,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:51:32,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922314282] [2021-08-06 20:51:32,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:51:32,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:51:32,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:51:32,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:51:32,944 INFO L87 Difference]: Start difference. First operand 10263 states and 23554 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:38,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:51:38,182 INFO L93 Difference]: Finished difference Result 16687 states and 38051 transitions. [2021-08-06 20:51:38,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-06 20:51:38,182 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:51:38,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:51:38,209 INFO L225 Difference]: With dead ends: 16687 [2021-08-06 20:51:38,209 INFO L226 Difference]: Without dead ends: 16672 [2021-08-06 20:51:38,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 4624.6ms TimeCoverageRelationStatistics Valid=861, Invalid=4541, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 20:51:38,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16672 states. [2021-08-06 20:51:38,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16672 to 10265. [2021-08-06 20:51:38,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10265 states, 10264 states have (on average 2.2953039750584567) internal successors, (23559), 10264 states have internal predecessors, (23559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:38,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10265 states to 10265 states and 23559 transitions. [2021-08-06 20:51:38,388 INFO L78 Accepts]: Start accepts. Automaton has 10265 states and 23559 transitions. Word has length 30 [2021-08-06 20:51:38,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:51:38,388 INFO L470 AbstractCegarLoop]: Abstraction has 10265 states and 23559 transitions. [2021-08-06 20:51:38,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:38,388 INFO L276 IsEmpty]: Start isEmpty. Operand 10265 states and 23559 transitions. [2021-08-06 20:51:38,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:51:38,399 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:51:38,399 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:51:38,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-06 20:51:38,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-08-06 20:51:38,599 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:51:38,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:51:38,600 INFO L82 PathProgramCache]: Analyzing trace with hash -162346594, now seen corresponding path program 90 times [2021-08-06 20:51:38,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:51:38,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640446266] [2021-08-06 20:51:38,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:51:38,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:51:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:38,724 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:51:38,732 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:51:38,936 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:51:38,937 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:51:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:38,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:51:38,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640446266] [2021-08-06 20:51:38,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640446266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:38,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589073483] [2021-08-06 20:51:38,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:51:38,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:38,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:51:38,953 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:51:38,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 20:51:42,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:51:42,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:51:42,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:51:42,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:51:43,500 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-08-06 20:51:43,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 56 [2021-08-06 20:51:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:43,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589073483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:43,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:51:43,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:51:43,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114496090] [2021-08-06 20:51:43,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:51:43,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:51:43,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:51:43,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:51:43,583 INFO L87 Difference]: Start difference. First operand 10265 states and 23559 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-06 20:51:45,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:51:45,826 INFO L93 Difference]: Finished difference Result 14186 states and 31973 transitions. [2021-08-06 20:51:45,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 20:51:45,827 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-08-06 20:51:45,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:51:45,848 INFO L225 Difference]: With dead ends: 14186 [2021-08-06 20:51:45,848 INFO L226 Difference]: Without dead ends: 14176 [2021-08-06 20:51:45,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1707.2ms TimeCoverageRelationStatistics Valid=493, Invalid=1577, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:51:45,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14176 states. [2021-08-06 20:51:45,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14176 to 10312. [2021-08-06 20:51:45,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10312 states, 10311 states have (on average 2.2964794879255166) internal successors, (23679), 10311 states have internal predecessors, (23679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10312 states to 10312 states and 23679 transitions. [2021-08-06 20:51:46,003 INFO L78 Accepts]: Start accepts. Automaton has 10312 states and 23679 transitions. Word has length 30 [2021-08-06 20:51:46,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:51:46,004 INFO L470 AbstractCegarLoop]: Abstraction has 10312 states and 23679 transitions. [2021-08-06 20:51:46,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-06 20:51:46,004 INFO L276 IsEmpty]: Start isEmpty. Operand 10312 states and 23679 transitions. [2021-08-06 20:51:46,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:51:46,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:51:46,014 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:51:46,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-08-06 20:51:46,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:46,215 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:51:46,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:51:46,215 INFO L82 PathProgramCache]: Analyzing trace with hash 453728542, now seen corresponding path program 91 times [2021-08-06 20:51:46,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:51:46,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837578079] [2021-08-06 20:51:46,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:51:46,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:51:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:46,523 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:51:46,525 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:51:46,554 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:51:46,555 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:51:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:46,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:51:46,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837578079] [2021-08-06 20:51:46,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837578079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:46,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014644104] [2021-08-06 20:51:46,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:51:46,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:46,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:51:46,585 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:51:46,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 20:51:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:50,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 20:51:50,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:51:51,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:51:51,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 20:51:51,209 INFO L354 Elim1Store]: treesize reduction 62, result has 10.1 percent of original size [2021-08-06 20:51:51,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 34 [2021-08-06 20:51:51,327 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:51,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014644104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:51,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:51:51,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-08-06 20:51:51,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885871502] [2021-08-06 20:51:51,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:51:51,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:51:51,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:51:51,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:51:51,328 INFO L87 Difference]: Start difference. First operand 10312 states and 23679 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:55,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:51:55,893 INFO L93 Difference]: Finished difference Result 15984 states and 36104 transitions. [2021-08-06 20:51:55,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-06 20:51:55,894 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:51:55,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:51:55,919 INFO L225 Difference]: With dead ends: 15984 [2021-08-06 20:51:55,919 INFO L226 Difference]: Without dead ends: 15969 [2021-08-06 20:51:55,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2042 ImplicationChecksByTransitivity, 4046.7ms TimeCoverageRelationStatistics Valid=790, Invalid=5530, Unknown=0, NotChecked=0, Total=6320 [2021-08-06 20:51:55,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15969 states. [2021-08-06 20:51:56,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15969 to 10352. [2021-08-06 20:51:56,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10352 states, 10351 states have (on average 2.296686310501401) internal successors, (23773), 10351 states have internal predecessors, (23773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:56,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10352 states to 10352 states and 23773 transitions. [2021-08-06 20:51:56,096 INFO L78 Accepts]: Start accepts. Automaton has 10352 states and 23773 transitions. Word has length 30 [2021-08-06 20:51:56,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:51:56,097 INFO L470 AbstractCegarLoop]: Abstraction has 10352 states and 23773 transitions. [2021-08-06 20:51:56,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:56,097 INFO L276 IsEmpty]: Start isEmpty. Operand 10352 states and 23773 transitions. [2021-08-06 20:51:56,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:51:56,108 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:51:56,108 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:51:56,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-06 20:51:56,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:56,308 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:51:56,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:51:56,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1030119838, now seen corresponding path program 92 times [2021-08-06 20:51:56,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:51:56,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19048802] [2021-08-06 20:51:56,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:51:56,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:51:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:56,505 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:51:56,511 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:51:56,712 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:51:56,713 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:51:56,738 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:51:56,739 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:51:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:56,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:51:56,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19048802] [2021-08-06 20:51:56,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19048802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:56,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238062553] [2021-08-06 20:51:56,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:51:56,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:56,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:51:56,762 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:51:56,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 20:52:00,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:52:00,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:52:00,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:52:00,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:52:01,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:52:01,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 73 [2021-08-06 20:52:02,124 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 33, result has 64.1 percent of original size [2021-08-06 20:52:02,142 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 33, result has 64.1 percent of original size [2021-08-06 20:52:02,348 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 30.8 percent of original size [2021-08-06 20:52:02,349 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 30.8 percent of original size [2021-08-06 20:52:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:02,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238062553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:02,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:52:02,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-06 20:52:02,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14531335] [2021-08-06 20:52:02,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:52:02,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:52:02,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:52:02,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:52:02,410 INFO L87 Difference]: Start difference. First operand 10352 states and 23773 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:06,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:52:06,525 INFO L93 Difference]: Finished difference Result 17593 states and 39602 transitions. [2021-08-06 20:52:06,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 20:52:06,525 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:52:06,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:52:06,554 INFO L225 Difference]: With dead ends: 17593 [2021-08-06 20:52:06,554 INFO L226 Difference]: Without dead ends: 17588 [2021-08-06 20:52:06,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 3680.2ms TimeCoverageRelationStatistics Valid=701, Invalid=3205, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 20:52:06,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17588 states. [2021-08-06 20:52:06,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17588 to 10352. [2021-08-06 20:52:06,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10352 states, 10351 states have (on average 2.296686310501401) internal successors, (23773), 10351 states have internal predecessors, (23773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:06,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10352 states to 10352 states and 23773 transitions. [2021-08-06 20:52:06,739 INFO L78 Accepts]: Start accepts. Automaton has 10352 states and 23773 transitions. Word has length 30 [2021-08-06 20:52:06,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:52:06,739 INFO L470 AbstractCegarLoop]: Abstraction has 10352 states and 23773 transitions. [2021-08-06 20:52:06,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:06,739 INFO L276 IsEmpty]: Start isEmpty. Operand 10352 states and 23773 transitions. [2021-08-06 20:52:06,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:52:06,749 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:52:06,750 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:52:06,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-08-06 20:52:06,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-06 20:52:06,950 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:52:06,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:52:06,950 INFO L82 PathProgramCache]: Analyzing trace with hash 372838686, now seen corresponding path program 93 times [2021-08-06 20:52:06,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:52:06,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851260138] [2021-08-06 20:52:06,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:52:06,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:52:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:07,217 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:52:07,219 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:52:07,244 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:52:07,245 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:52:07,267 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:52:07,268 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:52:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:07,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:52:07,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851260138] [2021-08-06 20:52:07,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851260138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:07,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704192757] [2021-08-06 20:52:07,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:52:07,288 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:07,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:52:07,288 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:52:07,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-06 20:52:11,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:52:11,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:52:11,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 20:52:11,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:52:11,754 INFO L354 Elim1Store]: treesize reduction 16, result has 75.4 percent of original size [2021-08-06 20:52:11,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 37 treesize of output 71 [2021-08-06 20:52:11,793 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 47.6 percent of original size [2021-08-06 20:52:11,815 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 47.6 percent of original size [2021-08-06 20:52:11,869 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 71.0 percent of original size [2021-08-06 20:52:11,870 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 71.0 percent of original size [2021-08-06 20:52:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:12,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704192757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:12,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:52:12,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:52:12,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932492017] [2021-08-06 20:52:12,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:52:12,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:52:12,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:52:12,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:52:12,058 INFO L87 Difference]: Start difference. First operand 10352 states and 23773 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:52:15,235 INFO L93 Difference]: Finished difference Result 16173 states and 36791 transitions. [2021-08-06 20:52:15,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 20:52:15,236 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:52:15,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:52:15,260 INFO L225 Difference]: With dead ends: 16173 [2021-08-06 20:52:15,260 INFO L226 Difference]: Without dead ends: 16163 [2021-08-06 20:52:15,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 2679.6ms TimeCoverageRelationStatistics Valid=541, Invalid=2765, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 20:52:15,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16163 states. [2021-08-06 20:52:15,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16163 to 10357. [2021-08-06 20:52:15,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10357 states, 10356 states have (on average 2.2969293163383546) internal successors, (23787), 10356 states have internal predecessors, (23787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:15,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10357 states to 10357 states and 23787 transitions. [2021-08-06 20:52:15,436 INFO L78 Accepts]: Start accepts. Automaton has 10357 states and 23787 transitions. Word has length 30 [2021-08-06 20:52:15,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:52:15,436 INFO L470 AbstractCegarLoop]: Abstraction has 10357 states and 23787 transitions. [2021-08-06 20:52:15,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:15,436 INFO L276 IsEmpty]: Start isEmpty. Operand 10357 states and 23787 transitions. [2021-08-06 20:52:15,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:52:15,447 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:52:15,447 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:52:15,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-08-06 20:52:15,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:15,648 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:52:15,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:52:15,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1741415454, now seen corresponding path program 94 times [2021-08-06 20:52:15,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:52:15,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488356379] [2021-08-06 20:52:15,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:52:15,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:52:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:15,896 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:52:15,898 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:52:15,922 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:52:15,923 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:52:15,945 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:52:15,946 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:52:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:15,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:52:15,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488356379] [2021-08-06 20:52:15,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488356379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:15,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108218832] [2021-08-06 20:52:15,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:52:15,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:15,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:52:15,968 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:52:15,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-06 20:52:19,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:52:19,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:52:19,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 20:52:19,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:52:20,551 INFO L354 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-08-06 20:52:20,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 45 [2021-08-06 20:52:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:20,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108218832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:20,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:52:20,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:52:20,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627244949] [2021-08-06 20:52:20,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:52:20,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:52:20,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:52:20,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:52:20,725 INFO L87 Difference]: Start difference. First operand 10357 states and 23787 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:25,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:52:25,426 INFO L93 Difference]: Finished difference Result 15872 states and 36577 transitions. [2021-08-06 20:52:25,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 20:52:25,426 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:52:25,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:52:25,452 INFO L225 Difference]: With dead ends: 15872 [2021-08-06 20:52:25,452 INFO L226 Difference]: Without dead ends: 15862 [2021-08-06 20:52:25,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 4067.9ms TimeCoverageRelationStatistics Valid=747, Invalid=3809, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 20:52:25,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15862 states. [2021-08-06 20:52:25,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15862 to 10369. [2021-08-06 20:52:25,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10369 states, 10368 states have (on average 2.296682098765432) internal successors, (23812), 10368 states have internal predecessors, (23812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10369 states to 10369 states and 23812 transitions. [2021-08-06 20:52:25,684 INFO L78 Accepts]: Start accepts. Automaton has 10369 states and 23812 transitions. Word has length 30 [2021-08-06 20:52:25,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:52:25,684 INFO L470 AbstractCegarLoop]: Abstraction has 10369 states and 23812 transitions. [2021-08-06 20:52:25,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:25,684 INFO L276 IsEmpty]: Start isEmpty. Operand 10369 states and 23812 transitions. [2021-08-06 20:52:25,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:52:25,695 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:52:25,695 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:52:25,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-06 20:52:25,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-06 20:52:25,896 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:52:25,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:52:25,896 INFO L82 PathProgramCache]: Analyzing trace with hash 275507162, now seen corresponding path program 95 times [2021-08-06 20:52:25,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:52:25,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521179916] [2021-08-06 20:52:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:52:25,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:52:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:26,063 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:52:26,074 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:52:26,265 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 88.9 percent of original size [2021-08-06 20:52:26,267 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 88.9 percent of original size [2021-08-06 20:52:26,331 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:52:26,332 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:52:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:26,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:52:26,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521179916] [2021-08-06 20:52:26,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521179916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:26,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558998136] [2021-08-06 20:52:26,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:52:26,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:26,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:52:26,349 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:52:26,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-06 20:52:30,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:52:30,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:52:30,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:52:30,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:52:31,082 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:52:31,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 27 [2021-08-06 20:52:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:31,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558998136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:31,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:52:31,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:52:31,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219229695] [2021-08-06 20:52:31,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:52:31,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:52:31,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:52:31,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:52:31,166 INFO L87 Difference]: Start difference. First operand 10369 states and 23812 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-06 20:52:33,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:52:33,089 INFO L93 Difference]: Finished difference Result 11422 states and 25776 transitions. [2021-08-06 20:52:33,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:52:33,090 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-08-06 20:52:33,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:52:33,105 INFO L225 Difference]: With dead ends: 11422 [2021-08-06 20:52:33,105 INFO L226 Difference]: Without dead ends: 11417 [2021-08-06 20:52:33,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1633.6ms TimeCoverageRelationStatistics Valid=372, Invalid=1434, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:52:33,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11417 states. [2021-08-06 20:52:33,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11417 to 10395. [2021-08-06 20:52:33,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10395 states, 10394 states have (on average 2.296902058880123) internal successors, (23874), 10394 states have internal predecessors, (23874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:33,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10395 states to 10395 states and 23874 transitions. [2021-08-06 20:52:33,243 INFO L78 Accepts]: Start accepts. Automaton has 10395 states and 23874 transitions. Word has length 30 [2021-08-06 20:52:33,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:52:33,243 INFO L470 AbstractCegarLoop]: Abstraction has 10395 states and 23874 transitions. [2021-08-06 20:52:33,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-06 20:52:33,243 INFO L276 IsEmpty]: Start isEmpty. Operand 10395 states and 23874 transitions. [2021-08-06 20:52:33,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:52:33,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:52:33,254 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:52:33,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-06 20:52:33,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-06 20:52:33,454 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:52:33,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:52:33,455 INFO L82 PathProgramCache]: Analyzing trace with hash 891582298, now seen corresponding path program 96 times [2021-08-06 20:52:33,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:52:33,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956292791] [2021-08-06 20:52:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:52:33,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:52:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:33,812 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:52:33,814 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:52:33,836 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:52:33,837 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:52:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:33,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:52:33,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956292791] [2021-08-06 20:52:33,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956292791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:33,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568750061] [2021-08-06 20:52:33,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:52:33,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:33,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:52:33,858 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:52:33,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-06 20:52:37,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:52:37,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:52:37,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:52:37,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:52:38,579 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 20:52:38,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 20:52:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:38,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568750061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:38,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:52:38,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:52:38,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43757976] [2021-08-06 20:52:38,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:52:38,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:52:38,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:52:38,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:52:38,665 INFO L87 Difference]: Start difference. First operand 10395 states and 23874 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:42,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:52:42,019 INFO L93 Difference]: Finished difference Result 14574 states and 33233 transitions. [2021-08-06 20:52:42,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-06 20:52:42,019 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:52:42,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:52:42,041 INFO L225 Difference]: With dead ends: 14574 [2021-08-06 20:52:42,041 INFO L226 Difference]: Without dead ends: 14564 [2021-08-06 20:52:42,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 3006.4ms TimeCoverageRelationStatistics Valid=480, Invalid=3552, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 20:52:42,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14564 states. [2021-08-06 20:52:42,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14564 to 10399. [2021-08-06 20:52:42,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10399 states, 10398 states have (on average 2.296980188497788) internal successors, (23884), 10398 states have internal predecessors, (23884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:42,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10399 states to 10399 states and 23884 transitions. [2021-08-06 20:52:42,291 INFO L78 Accepts]: Start accepts. Automaton has 10399 states and 23884 transitions. Word has length 30 [2021-08-06 20:52:42,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:52:42,291 INFO L470 AbstractCegarLoop]: Abstraction has 10399 states and 23884 transitions. [2021-08-06 20:52:42,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:42,291 INFO L276 IsEmpty]: Start isEmpty. Operand 10399 states and 23884 transitions. [2021-08-06 20:52:42,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:52:42,301 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:52:42,301 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:52:42,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-06 20:52:42,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-06 20:52:42,505 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:52:42,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:52:42,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1658100962, now seen corresponding path program 97 times [2021-08-06 20:52:42,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:52:42,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111904040] [2021-08-06 20:52:42,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:52:42,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:52:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:42,774 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:52:42,775 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:52:42,797 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:52:42,798 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:52:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:42,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:52:42,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111904040] [2021-08-06 20:52:42,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111904040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:42,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350346043] [2021-08-06 20:52:42,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:52:42,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:42,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:52:42,819 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:52:42,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-06 20:52:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:46,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:52:46,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:52:47,736 INFO L354 Elim1Store]: treesize reduction 74, result has 8.6 percent of original size [2021-08-06 20:52:47,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 110 treesize of output 75 [2021-08-06 20:52:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:47,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350346043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:47,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:52:47,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:52:47,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548456812] [2021-08-06 20:52:47,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:52:47,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:52:47,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:52:47,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:52:47,839 INFO L87 Difference]: Start difference. First operand 10399 states and 23884 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:51,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:52:51,686 INFO L93 Difference]: Finished difference Result 14548 states and 33202 transitions. [2021-08-06 20:52:51,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-06 20:52:51,686 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:52:51,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:52:51,709 INFO L225 Difference]: With dead ends: 14548 [2021-08-06 20:52:51,709 INFO L226 Difference]: Without dead ends: 14538 [2021-08-06 20:52:51,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 3438.2ms TimeCoverageRelationStatistics Valid=507, Invalid=3399, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 20:52:51,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14538 states. [2021-08-06 20:52:51,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14538 to 10407. [2021-08-06 20:52:51,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10407 states, 10406 states have (on average 2.29655967710936) internal successors, (23898), 10406 states have internal predecessors, (23898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:51,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10407 states to 10407 states and 23898 transitions. [2021-08-06 20:52:51,875 INFO L78 Accepts]: Start accepts. Automaton has 10407 states and 23898 transitions. Word has length 30 [2021-08-06 20:52:51,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:52:51,875 INFO L470 AbstractCegarLoop]: Abstraction has 10407 states and 23898 transitions. [2021-08-06 20:52:51,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:51,875 INFO L276 IsEmpty]: Start isEmpty. Operand 10407 states and 23898 transitions. [2021-08-06 20:52:51,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:52:51,886 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:52:51,886 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:52:51,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-06 20:52:52,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:52,089 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:52:52,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:52:52,089 INFO L82 PathProgramCache]: Analyzing trace with hash 533329626, now seen corresponding path program 30 times [2021-08-06 20:52:52,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:52:52,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331268557] [2021-08-06 20:52:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:52:52,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:52:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:52,157 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 55, result has 36.8 percent of original size [2021-08-06 20:52:52,162 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 55, result has 36.8 percent of original size [2021-08-06 20:52:52,197 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 58.6 percent of original size [2021-08-06 20:52:52,207 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 58.6 percent of original size [2021-08-06 20:52:52,275 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 52, result has 59.7 percent of original size [2021-08-06 20:52:52,284 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 52, result has 59.7 percent of original size [2021-08-06 20:52:52,345 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 50, result has 64.5 percent of original size [2021-08-06 20:52:52,357 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 50, result has 64.5 percent of original size [2021-08-06 20:52:52,427 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 75, result has 53.7 percent of original size [2021-08-06 20:52:52,436 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 75, result has 53.7 percent of original size [2021-08-06 20:52:52,500 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 66.3 percent of original size [2021-08-06 20:52:52,504 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 66.3 percent of original size [2021-08-06 20:52:52,549 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 76.7 percent of original size [2021-08-06 20:52:52,551 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 76.7 percent of original size [2021-08-06 20:52:52,613 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 76.9 percent of original size [2021-08-06 20:52:52,615 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 76.9 percent of original size [2021-08-06 20:52:52,646 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 72.7 percent of original size [2021-08-06 20:52:52,648 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 72.7 percent of original size [2021-08-06 20:52:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:52,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:52:52,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331268557] [2021-08-06 20:52:52,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331268557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:52,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375213915] [2021-08-06 20:52:52,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:52:52,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:52,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:52:52,677 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:52:52,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-06 20:52:56,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:52:56,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:52:56,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:52:56,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:52:57,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:52:57,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:52:57,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:52:57,441 INFO L354 Elim1Store]: treesize reduction 119, result has 7.8 percent of original size [2021-08-06 20:52:57,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 43 treesize of output 32 [2021-08-06 20:52:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:57,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375213915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:57,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:52:57,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 20:52:57,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969287242] [2021-08-06 20:52:57,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:52:57,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:52:57,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:52:57,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:52:57,525 INFO L87 Difference]: Start difference. First operand 10407 states and 23898 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:00,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:53:00,926 INFO L93 Difference]: Finished difference Result 10504 states and 24026 transitions. [2021-08-06 20:53:00,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 20:53:00,927 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:53:00,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:53:00,940 INFO L225 Difference]: With dead ends: 10504 [2021-08-06 20:53:00,941 INFO L226 Difference]: Without dead ends: 10499 [2021-08-06 20:53:00,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 3132.3ms TimeCoverageRelationStatistics Valid=438, Invalid=2754, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 20:53:00,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10499 states. [2021-08-06 20:53:01,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10499 to 10403. [2021-08-06 20:53:01,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10403 states, 10402 states have (on average 2.296673716592963) internal successors, (23890), 10402 states have internal predecessors, (23890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10403 states to 10403 states and 23890 transitions. [2021-08-06 20:53:01,069 INFO L78 Accepts]: Start accepts. Automaton has 10403 states and 23890 transitions. Word has length 30 [2021-08-06 20:53:01,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:53:01,069 INFO L470 AbstractCegarLoop]: Abstraction has 10403 states and 23890 transitions. [2021-08-06 20:53:01,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:01,069 INFO L276 IsEmpty]: Start isEmpty. Operand 10403 states and 23890 transitions. [2021-08-06 20:53:01,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:53:01,079 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:53:01,079 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:53:01,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-06 20:53:01,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:01,281 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:53:01,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:53:01,281 INFO L82 PathProgramCache]: Analyzing trace with hash -807514278, now seen corresponding path program 98 times [2021-08-06 20:53:01,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:53:01,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209318592] [2021-08-06 20:53:01,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:53:01,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:53:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:01,549 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:53:01,550 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:53:01,571 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:53:01,572 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:53:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:01,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:53:01,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209318592] [2021-08-06 20:53:01,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209318592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:01,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160163845] [2021-08-06 20:53:01,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:53:01,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:01,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:53:01,592 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:53:01,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-06 20:53:05,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:53:05,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:53:05,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:53:05,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:53:06,471 INFO L354 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2021-08-06 20:53:06,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 37 treesize of output 63 [2021-08-06 20:53:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:06,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160163845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:06,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:53:06,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:53:06,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820557162] [2021-08-06 20:53:06,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:53:06,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:53:06,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:53:06,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:53:06,691 INFO L87 Difference]: Start difference. First operand 10403 states and 23890 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:09,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:53:09,440 INFO L93 Difference]: Finished difference Result 14864 states and 34057 transitions. [2021-08-06 20:53:09,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 20:53:09,441 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:53:09,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:53:09,462 INFO L225 Difference]: With dead ends: 14864 [2021-08-06 20:53:09,462 INFO L226 Difference]: Without dead ends: 14859 [2021-08-06 20:53:09,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 2271.3ms TimeCoverageRelationStatistics Valid=408, Invalid=2454, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 20:53:09,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14859 states. [2021-08-06 20:53:09,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14859 to 10405. [2021-08-06 20:53:09,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10405 states, 10404 states have (on average 2.2968089196462897) internal successors, (23896), 10404 states have internal predecessors, (23896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:09,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10405 states to 10405 states and 23896 transitions. [2021-08-06 20:53:09,626 INFO L78 Accepts]: Start accepts. Automaton has 10405 states and 23896 transitions. Word has length 30 [2021-08-06 20:53:09,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:53:09,626 INFO L470 AbstractCegarLoop]: Abstraction has 10405 states and 23896 transitions. [2021-08-06 20:53:09,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:09,627 INFO L276 IsEmpty]: Start isEmpty. Operand 10405 states and 23896 transitions. [2021-08-06 20:53:09,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:53:09,637 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:53:09,637 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:53:09,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-06 20:53:09,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-06 20:53:09,841 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:53:09,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:53:09,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1300055770, now seen corresponding path program 31 times [2021-08-06 20:53:09,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:53:09,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602651938] [2021-08-06 20:53:09,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:53:09,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:53:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:09,906 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 55, result has 36.8 percent of original size [2021-08-06 20:53:09,911 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 55, result has 36.8 percent of original size [2021-08-06 20:53:09,947 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 58.6 percent of original size [2021-08-06 20:53:09,956 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 58.6 percent of original size [2021-08-06 20:53:10,013 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 52, result has 59.7 percent of original size [2021-08-06 20:53:10,022 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 52, result has 59.7 percent of original size [2021-08-06 20:53:10,082 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 50, result has 64.5 percent of original size [2021-08-06 20:53:10,094 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 50, result has 64.5 percent of original size [2021-08-06 20:53:10,163 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 75, result has 53.7 percent of original size [2021-08-06 20:53:10,172 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 75, result has 53.7 percent of original size [2021-08-06 20:53:10,235 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 66.3 percent of original size [2021-08-06 20:53:10,239 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 66.3 percent of original size [2021-08-06 20:53:10,283 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 65.3 percent of original size [2021-08-06 20:53:10,285 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 65.3 percent of original size [2021-08-06 20:53:10,408 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 76.9 percent of original size [2021-08-06 20:53:10,410 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 76.9 percent of original size [2021-08-06 20:53:10,440 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 72.7 percent of original size [2021-08-06 20:53:10,441 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 72.7 percent of original size [2021-08-06 20:53:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:10,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:53:10,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602651938] [2021-08-06 20:53:10,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602651938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:10,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158882648] [2021-08-06 20:53:10,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:53:10,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:10,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:53:10,469 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:53:10,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-06 20:53:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:14,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:53:14,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:53:15,316 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-06 20:53:15,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 35 treesize of output 28 [2021-08-06 20:53:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:15,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158882648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:15,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:53:15,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-08-06 20:53:15,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87766861] [2021-08-06 20:53:15,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:53:15,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:53:15,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:53:15,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:53:15,461 INFO L87 Difference]: Start difference. First operand 10405 states and 23896 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:18,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:53:18,835 INFO L93 Difference]: Finished difference Result 10544 states and 24095 transitions. [2021-08-06 20:53:18,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 20:53:18,835 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:53:18,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:53:18,850 INFO L225 Difference]: With dead ends: 10544 [2021-08-06 20:53:18,850 INFO L226 Difference]: Without dead ends: 10539 [2021-08-06 20:53:18,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 3281.1ms TimeCoverageRelationStatistics Valid=568, Invalid=2854, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 20:53:18,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10539 states. [2021-08-06 20:53:18,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10539 to 10405. [2021-08-06 20:53:18,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10405 states, 10404 states have (on average 2.2968089196462897) internal successors, (23896), 10404 states have internal predecessors, (23896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:18,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10405 states to 10405 states and 23896 transitions. [2021-08-06 20:53:18,985 INFO L78 Accepts]: Start accepts. Automaton has 10405 states and 23896 transitions. Word has length 30 [2021-08-06 20:53:18,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:53:18,985 INFO L470 AbstractCegarLoop]: Abstraction has 10405 states and 23896 transitions. [2021-08-06 20:53:18,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:18,985 INFO L276 IsEmpty]: Start isEmpty. Operand 10405 states and 23896 transitions. [2021-08-06 20:53:18,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:53:18,995 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:53:18,995 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:53:19,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-06 20:53:19,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable130 [2021-08-06 20:53:19,196 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:53:19,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:53:19,196 INFO L82 PathProgramCache]: Analyzing trace with hash -191439142, now seen corresponding path program 32 times [2021-08-06 20:53:19,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:53:19,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008529826] [2021-08-06 20:53:19,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:53:19,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:53:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:19,252 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 79.5 percent of original size [2021-08-06 20:53:19,256 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 79.5 percent of original size [2021-08-06 20:53:19,292 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 80.0 percent of original size [2021-08-06 20:53:19,295 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 80.0 percent of original size [2021-08-06 20:53:19,335 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 84.2 percent of original size [2021-08-06 20:53:19,338 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 84.2 percent of original size [2021-08-06 20:53:19,384 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 78.4 percent of original size [2021-08-06 20:53:19,389 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 78.4 percent of original size [2021-08-06 20:53:19,449 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 79.0 percent of original size [2021-08-06 20:53:19,454 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 79.0 percent of original size [2021-08-06 20:53:19,702 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 81.6 percent of original size [2021-08-06 20:53:19,705 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 81.6 percent of original size [2021-08-06 20:53:19,741 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 77.4 percent of original size [2021-08-06 20:53:19,742 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 77.4 percent of original size [2021-08-06 20:53:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:19,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:53:19,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008529826] [2021-08-06 20:53:19,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008529826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:19,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107963512] [2021-08-06 20:53:19,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:53:19,771 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:19,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:53:19,771 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:53:19,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-06 20:53:24,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:53:24,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:53:24,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:53:24,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:53:24,642 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-06 20:53:24,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 35 treesize of output 28 [2021-08-06 20:53:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:24,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107963512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:24,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:53:24,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-08-06 20:53:24,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709983956] [2021-08-06 20:53:24,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:53:24,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:53:24,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:53:24,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:53:24,749 INFO L87 Difference]: Start difference. First operand 10405 states and 23896 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 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) [2021-08-06 20:53:27,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:53:27,001 INFO L93 Difference]: Finished difference Result 10619 states and 24227 transitions. [2021-08-06 20:53:27,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 20:53:27,002 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:53:27,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:53:27,017 INFO L225 Difference]: With dead ends: 10619 [2021-08-06 20:53:27,017 INFO L226 Difference]: Without dead ends: 10604 [2021-08-06 20:53:27,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 2093.5ms TimeCoverageRelationStatistics Valid=445, Invalid=2747, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 20:53:27,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10604 states. [2021-08-06 20:53:27,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10604 to 10407. [2021-08-06 20:53:27,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10407 states, 10406 states have (on average 2.2968479723236594) internal successors, (23901), 10406 states have internal predecessors, (23901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:27,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10407 states to 10407 states and 23901 transitions. [2021-08-06 20:53:27,226 INFO L78 Accepts]: Start accepts. Automaton has 10407 states and 23901 transitions. Word has length 30 [2021-08-06 20:53:27,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:53:27,226 INFO L470 AbstractCegarLoop]: Abstraction has 10407 states and 23901 transitions. [2021-08-06 20:53:27,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 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) [2021-08-06 20:53:27,227 INFO L276 IsEmpty]: Start isEmpty. Operand 10407 states and 23901 transitions. [2021-08-06 20:53:27,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:53:27,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:53:27,237 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:53:27,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-06 20:53:27,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:27,437 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:53:27,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:53:27,438 INFO L82 PathProgramCache]: Analyzing trace with hash -31668070, now seen corresponding path program 99 times [2021-08-06 20:53:27,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:53:27,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461500381] [2021-08-06 20:53:27,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:53:27,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:53:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:27,562 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:53:27,569 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:53:27,632 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.9 percent of original size [2021-08-06 20:53:27,637 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.9 percent of original size [2021-08-06 20:53:27,781 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:53:27,781 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:53:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:27,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:53:27,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461500381] [2021-08-06 20:53:27,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461500381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:27,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740975671] [2021-08-06 20:53:27,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:53:27,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:27,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:53:27,799 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:53:27,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-06 20:53:32,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:53:32,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:53:32,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:53:32,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:53:32,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:53:32,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 73 [2021-08-06 20:53:33,084 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 30.8 percent of original size [2021-08-06 20:53:33,085 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 30.8 percent of original size [2021-08-06 20:53:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:33,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740975671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:33,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:53:33,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-06 20:53:33,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541125470] [2021-08-06 20:53:33,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:53:33,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:53:33,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:53:33,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:53:33,144 INFO L87 Difference]: Start difference. First operand 10407 states and 23901 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:35,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:53:35,283 INFO L93 Difference]: Finished difference Result 13441 states and 30672 transitions. [2021-08-06 20:53:35,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:53:35,283 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:53:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:53:35,302 INFO L225 Difference]: With dead ends: 13441 [2021-08-06 20:53:35,302 INFO L226 Difference]: Without dead ends: 13393 [2021-08-06 20:53:35,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1920.8ms TimeCoverageRelationStatistics Valid=318, Invalid=1938, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 20:53:35,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13393 states. [2021-08-06 20:53:35,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13393 to 10415. [2021-08-06 20:53:35,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10415 states, 10414 states have (on average 2.29681198386787) internal successors, (23919), 10414 states have internal predecessors, (23919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:35,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10415 states to 10415 states and 23919 transitions. [2021-08-06 20:53:35,451 INFO L78 Accepts]: Start accepts. Automaton has 10415 states and 23919 transitions. Word has length 30 [2021-08-06 20:53:35,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:53:35,451 INFO L470 AbstractCegarLoop]: Abstraction has 10415 states and 23919 transitions. [2021-08-06 20:53:35,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:35,451 INFO L276 IsEmpty]: Start isEmpty. Operand 10415 states and 23919 transitions. [2021-08-06 20:53:35,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:53:35,461 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:53:35,461 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:53:35,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-06 20:53:35,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:35,662 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:53:35,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:53:35,662 INFO L82 PathProgramCache]: Analyzing trace with hash 222121054, now seen corresponding path program 100 times [2021-08-06 20:53:35,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:53:35,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261928774] [2021-08-06 20:53:35,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:53:35,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:53:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:35,873 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:53:35,880 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:53:35,942 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.9 percent of original size [2021-08-06 20:53:35,948 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.9 percent of original size [2021-08-06 20:53:36,085 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:53:36,086 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:53:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:36,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:53:36,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261928774] [2021-08-06 20:53:36,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261928774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:36,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700513301] [2021-08-06 20:53:36,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:53:36,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:36,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:53:36,103 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:53:36,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-06 20:53:40,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:53:40,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:53:40,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:53:40,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:53:41,335 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-08-06 20:53:41,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 56 [2021-08-06 20:53:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:41,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700513301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:41,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:53:41,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:53:41,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796703348] [2021-08-06 20:53:41,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:53:41,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:53:41,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:53:41,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:53:41,442 INFO L87 Difference]: Start difference. First operand 10415 states and 23919 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-06 20:53:42,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:53:42,429 INFO L93 Difference]: Finished difference Result 13472 states and 30755 transitions. [2021-08-06 20:53:42,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:53:42,429 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-08-06 20:53:42,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:53:42,449 INFO L225 Difference]: With dead ends: 13472 [2021-08-06 20:53:42,449 INFO L226 Difference]: Without dead ends: 13453 [2021-08-06 20:53:42,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1016.8ms TimeCoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:53:42,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13453 states. [2021-08-06 20:53:42,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13453 to 10429. [2021-08-06 20:53:42,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10429 states, 10428 states have (on average 2.2969888761028003) internal successors, (23953), 10428 states have internal predecessors, (23953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:42,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10429 states to 10429 states and 23953 transitions. [2021-08-06 20:53:42,599 INFO L78 Accepts]: Start accepts. Automaton has 10429 states and 23953 transitions. Word has length 30 [2021-08-06 20:53:42,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:53:42,600 INFO L470 AbstractCegarLoop]: Abstraction has 10429 states and 23953 transitions. [2021-08-06 20:53:42,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-06 20:53:42,600 INFO L276 IsEmpty]: Start isEmpty. Operand 10429 states and 23953 transitions. [2021-08-06 20:53:42,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:53:42,610 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:53:42,610 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:53:42,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-08-06 20:53:42,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-06 20:53:42,811 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:53:42,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:53:42,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1881415654, now seen corresponding path program 101 times [2021-08-06 20:53:42,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:53:42,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164628682] [2021-08-06 20:53:42,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:53:42,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:53:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:42,903 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 70, result has 46.6 percent of original size [2021-08-06 20:53:42,908 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 70, result has 46.6 percent of original size [2021-08-06 20:53:43,041 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 88.3 percent of original size [2021-08-06 20:53:43,045 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 88.3 percent of original size [2021-08-06 20:53:43,085 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 89.4 percent of original size [2021-08-06 20:53:43,090 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 89.4 percent of original size [2021-08-06 20:53:43,137 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 87.3 percent of original size [2021-08-06 20:53:43,141 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 87.3 percent of original size [2021-08-06 20:53:43,186 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 90.5 percent of original size [2021-08-06 20:53:43,191 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 90.5 percent of original size [2021-08-06 20:53:43,238 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.7 percent of original size [2021-08-06 20:53:43,240 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.7 percent of original size [2021-08-06 20:53:43,295 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:53:43,296 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:53:43,318 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:53:43,319 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:53:43,337 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:43,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:53:43,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164628682] [2021-08-06 20:53:43,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164628682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:43,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356717951] [2021-08-06 20:53:43,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:53:43,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:43,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:53:43,338 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:53:43,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-06 20:53:47,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:53:47,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:53:47,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:53:47,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:53:48,531 INFO L354 Elim1Store]: treesize reduction 66, result has 9.6 percent of original size [2021-08-06 20:53:48,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 43 treesize of output 37 [2021-08-06 20:53:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:48,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356717951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:48,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:53:48,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:53:48,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032974054] [2021-08-06 20:53:48,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:53:48,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:53:48,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:53:48,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:53:48,600 INFO L87 Difference]: Start difference. First operand 10429 states and 23953 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:51,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:53:51,929 INFO L93 Difference]: Finished difference Result 10548 states and 24132 transitions. [2021-08-06 20:53:51,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-06 20:53:51,930 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:53:51,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:53:51,944 INFO L225 Difference]: With dead ends: 10548 [2021-08-06 20:53:51,944 INFO L226 Difference]: Without dead ends: 10543 [2021-08-06 20:53:51,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 2969.8ms TimeCoverageRelationStatistics Valid=393, Invalid=3147, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 20:53:51,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10543 states. [2021-08-06 20:53:52,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10543 to 10445. [2021-08-06 20:53:52,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10445 states, 10444 states have (on average 2.296916890080429) internal successors, (23989), 10444 states have internal predecessors, (23989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:52,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10445 states to 10445 states and 23989 transitions. [2021-08-06 20:53:52,074 INFO L78 Accepts]: Start accepts. Automaton has 10445 states and 23989 transitions. Word has length 30 [2021-08-06 20:53:52,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:53:52,074 INFO L470 AbstractCegarLoop]: Abstraction has 10445 states and 23989 transitions. [2021-08-06 20:53:52,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:52,074 INFO L276 IsEmpty]: Start isEmpty. Operand 10445 states and 23989 transitions. [2021-08-06 20:53:52,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:53:52,085 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:53:52,085 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:53:52,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-06 20:53:52,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-06 20:53:52,286 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:53:52,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:53:52,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1498448026, now seen corresponding path program 102 times [2021-08-06 20:53:52,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:53:52,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344647993] [2021-08-06 20:53:52,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:53:52,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:53:52,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:52,510 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:53:52,520 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:53:52,585 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.9 percent of original size [2021-08-06 20:53:52,590 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.9 percent of original size [2021-08-06 20:53:52,730 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:53:52,731 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:53:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:52,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:53:52,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344647993] [2021-08-06 20:53:52,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344647993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:52,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054656038] [2021-08-06 20:53:52,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:53:52,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:52,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:53:52,747 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:53:52,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-06 20:53:57,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:53:57,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:53:57,201 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:53:57,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:53:57,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:53:57,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:53:58,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:53:58,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 59 [2021-08-06 20:53:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:58,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054656038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:58,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:53:58,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 25 [2021-08-06 20:53:58,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675084643] [2021-08-06 20:53:58,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:53:58,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:53:58,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:53:58,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:53:58,356 INFO L87 Difference]: Start difference. First operand 10445 states and 23989 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:00,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:54:00,114 INFO L93 Difference]: Finished difference Result 13470 states and 30738 transitions. [2021-08-06 20:54:00,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:54:00,115 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:54:00,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:54:00,134 INFO L225 Difference]: With dead ends: 13470 [2021-08-06 20:54:00,135 INFO L226 Difference]: Without dead ends: 13448 [2021-08-06 20:54:00,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1682.7ms TimeCoverageRelationStatistics Valid=320, Invalid=1660, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 20:54:00,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13448 states. [2021-08-06 20:54:00,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13448 to 10445. [2021-08-06 20:54:00,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10445 states, 10444 states have (on average 2.2967253925698965) internal successors, (23987), 10444 states have internal predecessors, (23987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:00,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10445 states to 10445 states and 23987 transitions. [2021-08-06 20:54:00,286 INFO L78 Accepts]: Start accepts. Automaton has 10445 states and 23987 transitions. Word has length 30 [2021-08-06 20:54:00,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:54:00,286 INFO L470 AbstractCegarLoop]: Abstraction has 10445 states and 23987 transitions. [2021-08-06 20:54:00,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:00,286 INFO L276 IsEmpty]: Start isEmpty. Operand 10445 states and 23987 transitions. [2021-08-06 20:54:00,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:54:00,297 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:54:00,297 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:54:00,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-08-06 20:54:00,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-06 20:54:00,498 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:54:00,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:54:00,498 INFO L82 PathProgramCache]: Analyzing trace with hash -827694950, now seen corresponding path program 103 times [2021-08-06 20:54:00,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:54:00,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821313415] [2021-08-06 20:54:00,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:54:00,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:54:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:54:00,637 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:54:00,641 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:54:00,795 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 77.9 percent of original size [2021-08-06 20:54:00,799 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 77.9 percent of original size [2021-08-06 20:54:00,934 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:54:00,935 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:54:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:00,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:54:00,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821313415] [2021-08-06 20:54:00,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821313415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:00,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140748015] [2021-08-06 20:54:00,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:54:00,953 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:54:00,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:54:00,953 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:54:00,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-06 20:54:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:54:05,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:54:05,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:54:06,373 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:54:06,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 27 [2021-08-06 20:54:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:06,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140748015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:06,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:54:06,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:54:06,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505768610] [2021-08-06 20:54:06,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:54:06,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:54:06,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:54:06,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:54:06,438 INFO L87 Difference]: Start difference. First operand 10445 states and 23987 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:08,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:54:08,376 INFO L93 Difference]: Finished difference Result 14771 states and 33573 transitions. [2021-08-06 20:54:08,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:54:08,377 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:54:08,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:54:08,401 INFO L225 Difference]: With dead ends: 14771 [2021-08-06 20:54:08,401 INFO L226 Difference]: Without dead ends: 14747 [2021-08-06 20:54:08,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1773.0ms TimeCoverageRelationStatistics Valid=352, Invalid=1718, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:54:08,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14747 states. [2021-08-06 20:54:08,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14747 to 10445. [2021-08-06 20:54:08,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10445 states, 10444 states have (on average 2.2966296438146303) internal successors, (23986), 10444 states have internal predecessors, (23986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:08,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10445 states to 10445 states and 23986 transitions. [2021-08-06 20:54:08,566 INFO L78 Accepts]: Start accepts. Automaton has 10445 states and 23986 transitions. Word has length 30 [2021-08-06 20:54:08,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:54:08,566 INFO L470 AbstractCegarLoop]: Abstraction has 10445 states and 23986 transitions. [2021-08-06 20:54:08,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:08,566 INFO L276 IsEmpty]: Start isEmpty. Operand 10445 states and 23986 transitions. [2021-08-06 20:54:08,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:54:08,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:54:08,577 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:54:08,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-06 20:54:08,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-06 20:54:08,778 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:54:08,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:54:08,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1894887578, now seen corresponding path program 104 times [2021-08-06 20:54:08,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:54:08,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582967982] [2021-08-06 20:54:08,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:54:08,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:54:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:54:08,893 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:54:08,898 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:54:08,946 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 77.9 percent of original size [2021-08-06 20:54:08,950 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 77.9 percent of original size [2021-08-06 20:54:09,073 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:54:09,074 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:54:09,094 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:54:09,095 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:54:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:09,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:54:09,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582967982] [2021-08-06 20:54:09,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582967982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:09,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601430372] [2021-08-06 20:54:09,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:54:09,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:54:09,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:54:09,114 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:54:09,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-06 20:54:13,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:54:13,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:54:13,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:54:13,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:54:14,483 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-08-06 20:54:14,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 84 [2021-08-06 20:54:14,573 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 55.6 percent of original size [2021-08-06 20:54:14,574 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 55.6 percent of original size [2021-08-06 20:54:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:14,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601430372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:14,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:54:14,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:54:14,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432441002] [2021-08-06 20:54:14,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:54:14,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:54:14,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:54:14,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:54:14,741 INFO L87 Difference]: Start difference. First operand 10445 states and 23986 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:17,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:54:17,211 INFO L93 Difference]: Finished difference Result 15908 states and 36046 transitions. [2021-08-06 20:54:17,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 20:54:17,212 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:54:17,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:54:17,236 INFO L225 Difference]: With dead ends: 15908 [2021-08-06 20:54:17,236 INFO L226 Difference]: Without dead ends: 15899 [2021-08-06 20:54:17,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 2124.5ms TimeCoverageRelationStatistics Valid=538, Invalid=2432, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 20:54:17,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15899 states. [2021-08-06 20:54:17,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15899 to 10447. [2021-08-06 20:54:17,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10447 states, 10446 states have (on average 2.2965728508520007) internal successors, (23990), 10446 states have internal predecessors, (23990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:17,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10447 states to 10447 states and 23990 transitions. [2021-08-06 20:54:17,406 INFO L78 Accepts]: Start accepts. Automaton has 10447 states and 23990 transitions. Word has length 30 [2021-08-06 20:54:17,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:54:17,406 INFO L470 AbstractCegarLoop]: Abstraction has 10447 states and 23990 transitions. [2021-08-06 20:54:17,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:17,406 INFO L276 IsEmpty]: Start isEmpty. Operand 10447 states and 23990 transitions. [2021-08-06 20:54:17,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:54:17,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:54:17,416 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:54:17,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-06 20:54:17,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:54:17,617 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:54:17,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:54:17,617 INFO L82 PathProgramCache]: Analyzing trace with hash -219366562, now seen corresponding path program 105 times [2021-08-06 20:54:17,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:54:17,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964643677] [2021-08-06 20:54:17,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:54:17,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:54:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:54:17,744 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:54:17,748 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:54:17,796 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 77.9 percent of original size [2021-08-06 20:54:17,802 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 77.9 percent of original size [2021-08-06 20:54:17,934 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:54:17,936 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:54:17,955 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:54:17,955 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 20:54:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:17,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:54:17,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964643677] [2021-08-06 20:54:17,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964643677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:17,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911469231] [2021-08-06 20:54:17,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:54:17,973 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:54:17,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:54:17,973 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:54:17,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-06 20:54:22,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:54:22,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:54:22,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:54:22,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:54:23,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:54:23,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 73 [2021-08-06 20:54:23,327 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 30, result has 69.7 percent of original size [2021-08-06 20:54:23,803 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 30, result has 69.7 percent of original size [2021-08-06 20:54:24,099 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 34, result has 63.4 percent of original size [2021-08-06 20:54:24,104 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 34, result has 63.4 percent of original size [2021-08-06 20:54:24,294 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 30.8 percent of original size [2021-08-06 20:54:24,295 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 30.8 percent of original size [2021-08-06 20:54:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:24,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911469231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:24,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:54:24,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-06 20:54:24,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726674336] [2021-08-06 20:54:24,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:54:24,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:54:24,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:54:24,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:54:24,354 INFO L87 Difference]: Start difference. First operand 10447 states and 23990 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:28,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:54:28,773 INFO L93 Difference]: Finished difference Result 15939 states and 36099 transitions. [2021-08-06 20:54:28,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 20:54:28,773 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:54:28,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:54:28,797 INFO L225 Difference]: With dead ends: 15939 [2021-08-06 20:54:28,797 INFO L226 Difference]: Without dead ends: 15917 [2021-08-06 20:54:28,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1556 ImplicationChecksByTransitivity, 3847.1ms TimeCoverageRelationStatistics Valid=773, Invalid=4197, Unknown=0, NotChecked=0, Total=4970 [2021-08-06 20:54:28,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15917 states. [2021-08-06 20:54:28,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15917 to 10455. [2021-08-06 20:54:28,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10455 states, 10454 states have (on average 2.29672852496652) internal successors, (24010), 10454 states have internal predecessors, (24010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:28,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10455 states to 10455 states and 24010 transitions. [2021-08-06 20:54:28,973 INFO L78 Accepts]: Start accepts. Automaton has 10455 states and 24010 transitions. Word has length 30 [2021-08-06 20:54:28,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:54:28,973 INFO L470 AbstractCegarLoop]: Abstraction has 10455 states and 24010 transitions. [2021-08-06 20:54:28,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:28,973 INFO L276 IsEmpty]: Start isEmpty. Operand 10455 states and 24010 transitions. [2021-08-06 20:54:28,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:54:28,983 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:54:28,983 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:54:29,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2021-08-06 20:54:29,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-06 20:54:29,184 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:54:29,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:54:29,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1072707738, now seen corresponding path program 106 times [2021-08-06 20:54:29,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:54:29,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473989832] [2021-08-06 20:54:29,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:54:29,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:54:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:54:29,302 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:54:29,309 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:54:29,468 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.9 percent of original size [2021-08-06 20:54:29,473 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.9 percent of original size [2021-08-06 20:54:29,618 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:54:29,619 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 54.2 percent of original size [2021-08-06 20:54:29,633 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:29,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:54:29,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473989832] [2021-08-06 20:54:29,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473989832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:29,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298267991] [2021-08-06 20:54:29,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:54:29,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:54:29,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:54:29,634 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:54:29,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-06 20:54:34,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:54:34,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:54:34,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:54:34,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:54:35,171 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:54:35,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 27 [2021-08-06 20:54:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:35,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298267991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:35,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:54:35,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:54:35,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126613564] [2021-08-06 20:54:35,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:54:35,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:54:35,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:54:35,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:54:35,252 INFO L87 Difference]: Start difference. First operand 10455 states and 24010 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-06 20:54:36,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:54:36,793 INFO L93 Difference]: Finished difference Result 14852 states and 33759 transitions. [2021-08-06 20:54:36,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:54:36,793 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-08-06 20:54:36,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:54:36,817 INFO L225 Difference]: With dead ends: 14852 [2021-08-06 20:54:36,817 INFO L226 Difference]: Without dead ends: 14830 [2021-08-06 20:54:36,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1285.3ms TimeCoverageRelationStatistics Valid=379, Invalid=1427, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:54:36,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14830 states. [2021-08-06 20:54:36,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14830 to 10457. [2021-08-06 20:54:36,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10457 states, 10456 states have (on average 2.2967674062739096) internal successors, (24015), 10456 states have internal predecessors, (24015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10457 states to 10457 states and 24015 transitions. [2021-08-06 20:54:36,979 INFO L78 Accepts]: Start accepts. Automaton has 10457 states and 24015 transitions. Word has length 30 [2021-08-06 20:54:36,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:54:36,979 INFO L470 AbstractCegarLoop]: Abstraction has 10457 states and 24015 transitions. [2021-08-06 20:54:36,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-06 20:54:36,979 INFO L276 IsEmpty]: Start isEmpty. Operand 10457 states and 24015 transitions. [2021-08-06 20:54:36,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:54:36,990 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:54:36,990 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:54:37,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-08-06 20:54:37,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-06 20:54:37,191 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:54:37,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:54:37,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1114689510, now seen corresponding path program 107 times [2021-08-06 20:54:37,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:54:37,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014891332] [2021-08-06 20:54:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:54:37,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:54:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:54:37,267 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 70, result has 46.6 percent of original size [2021-08-06 20:54:37,272 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 70, result has 46.6 percent of original size [2021-08-06 20:54:37,312 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 88.3 percent of original size [2021-08-06 20:54:37,316 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 88.3 percent of original size [2021-08-06 20:54:37,357 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 89.4 percent of original size [2021-08-06 20:54:37,362 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 89.4 percent of original size [2021-08-06 20:54:37,410 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 87.3 percent of original size [2021-08-06 20:54:37,414 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 87.3 percent of original size [2021-08-06 20:54:37,461 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 90.5 percent of original size [2021-08-06 20:54:37,465 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 90.5 percent of original size [2021-08-06 20:54:37,663 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:54:37,664 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:54:37,685 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:54:37,686 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:54:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:37,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:54:37,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014891332] [2021-08-06 20:54:37,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014891332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:37,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736198535] [2021-08-06 20:54:37,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:54:37,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:54:37,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:54:37,705 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:54:37,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-06 20:54:42,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:54:42,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:54:42,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:54:42,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:54:43,241 INFO L354 Elim1Store]: treesize reduction 111, result has 8.3 percent of original size [2021-08-06 20:54:43,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 67 treesize of output 62 [2021-08-06 20:54:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:43,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736198535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:43,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:54:43,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:54:43,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119105463] [2021-08-06 20:54:43,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:54:43,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:54:43,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:54:43,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:54:43,308 INFO L87 Difference]: Start difference. First operand 10457 states and 24015 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:47,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:54:47,278 INFO L93 Difference]: Finished difference Result 11495 states and 25777 transitions. [2021-08-06 20:54:47,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-06 20:54:47,279 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:54:47,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:54:47,294 INFO L225 Difference]: With dead ends: 11495 [2021-08-06 20:54:47,294 INFO L226 Difference]: Without dead ends: 11490 [2021-08-06 20:54:47,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 3543.4ms TimeCoverageRelationStatistics Valid=538, Invalid=4574, Unknown=0, NotChecked=0, Total=5112 [2021-08-06 20:54:47,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11490 states. [2021-08-06 20:54:47,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11490 to 10459. [2021-08-06 20:54:47,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10459 states, 10458 states have (on average 2.296710652132339) internal successors, (24019), 10458 states have internal predecessors, (24019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10459 states to 10459 states and 24019 transitions. [2021-08-06 20:54:47,431 INFO L78 Accepts]: Start accepts. Automaton has 10459 states and 24019 transitions. Word has length 30 [2021-08-06 20:54:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:54:47,431 INFO L470 AbstractCegarLoop]: Abstraction has 10459 states and 24019 transitions. [2021-08-06 20:54:47,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 10459 states and 24019 transitions. [2021-08-06 20:54:47,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:54:47,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:54:47,442 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:54:47,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2021-08-06 20:54:47,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:54:47,642 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:54:47,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:54:47,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1607893018, now seen corresponding path program 108 times [2021-08-06 20:54:47,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:54:47,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194835593] [2021-08-06 20:54:47,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:54:47,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:54:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:54:47,872 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 67.6 percent of original size [2021-08-06 20:54:47,873 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 67.6 percent of original size [2021-08-06 20:54:47,897 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:54:47,898 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:54:47,919 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:54:47,920 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:54:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:47,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:54:47,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194835593] [2021-08-06 20:54:47,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194835593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:47,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085734189] [2021-08-06 20:54:47,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:54:47,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:54:47,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:54:47,941 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:54:47,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-06 20:54:52,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:54:52,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:54:52,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:54:52,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:54:53,290 INFO L354 Elim1Store]: treesize reduction 16, result has 75.4 percent of original size [2021-08-06 20:54:53,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 37 treesize of output 71 [2021-08-06 20:54:53,317 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 37, result has 44.8 percent of original size [2021-08-06 20:54:53,327 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 37, result has 44.8 percent of original size [2021-08-06 20:54:53,392 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 71.0 percent of original size [2021-08-06 20:54:53,394 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 71.0 percent of original size [2021-08-06 20:54:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:53,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085734189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:53,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:54:53,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:54:53,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040597330] [2021-08-06 20:54:53,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:54:53,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:54:53,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:54:53,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:54:53,587 INFO L87 Difference]: Start difference. First operand 10459 states and 24019 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:56,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:54:56,281 INFO L93 Difference]: Finished difference Result 14997 states and 34314 transitions. [2021-08-06 20:54:56,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 20:54:56,281 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:54:56,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:54:56,303 INFO L225 Difference]: With dead ends: 14997 [2021-08-06 20:54:56,303 INFO L226 Difference]: Without dead ends: 14987 [2021-08-06 20:54:56,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2427.3ms TimeCoverageRelationStatistics Valid=563, Invalid=3097, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 20:54:56,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14987 states. [2021-08-06 20:54:56,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14987 to 10467. [2021-08-06 20:54:56,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10467 states, 10466 states have (on average 2.2970571373972866) internal successors, (24041), 10466 states have internal predecessors, (24041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:56,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10467 states to 10467 states and 24041 transitions. [2021-08-06 20:54:56,461 INFO L78 Accepts]: Start accepts. Automaton has 10467 states and 24041 transitions. Word has length 30 [2021-08-06 20:54:56,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:54:56,461 INFO L470 AbstractCegarLoop]: Abstraction has 10467 states and 24041 transitions. [2021-08-06 20:54:56,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:56,461 INFO L276 IsEmpty]: Start isEmpty. Operand 10467 states and 24041 transitions. [2021-08-06 20:54:56,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:54:56,472 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:54:56,472 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:54:56,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2021-08-06 20:54:56,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:54:56,672 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:54:56,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:54:56,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1081448102, now seen corresponding path program 109 times [2021-08-06 20:54:56,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:54:56,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780859130] [2021-08-06 20:54:56,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:54:56,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:54:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:54:56,792 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:54:56,797 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:54:56,843 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 77.9 percent of original size [2021-08-06 20:54:56,847 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 77.9 percent of original size [2021-08-06 20:54:56,890 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 70.8 percent of original size [2021-08-06 20:54:56,894 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 70.8 percent of original size [2021-08-06 20:54:56,932 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:54:56,935 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:54:57,090 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 48.0 percent of original size [2021-08-06 20:54:57,091 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 48.0 percent of original size [2021-08-06 20:54:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:57,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:54:57,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780859130] [2021-08-06 20:54:57,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780859130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:57,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597021890] [2021-08-06 20:54:57,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:54:57,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:54:57,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:54:57,108 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:54:57,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-06 20:55:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:55:01,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:55:01,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:55:02,663 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-08-06 20:55:02,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 56 [2021-08-06 20:55:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:55:02,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597021890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:55:02,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:55:02,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:55:02,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590580207] [2021-08-06 20:55:02,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:55:02,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:55:02,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:55:02,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:55:02,751 INFO L87 Difference]: Start difference. First operand 10467 states and 24041 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:03,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:55:03,966 INFO L93 Difference]: Finished difference Result 13379 states and 30621 transitions. [2021-08-06 20:55:03,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:55:03,967 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:55:03,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:55:03,992 INFO L225 Difference]: With dead ends: 13379 [2021-08-06 20:55:03,992 INFO L226 Difference]: Without dead ends: 13374 [2021-08-06 20:55:03,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1005.1ms TimeCoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:55:04,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13374 states. [2021-08-06 20:55:04,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13374 to 10471. [2021-08-06 20:55:04,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10471 states, 10470 states have (on average 2.297134670487106) internal successors, (24051), 10470 states have internal predecessors, (24051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:04,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10471 states to 10471 states and 24051 transitions. [2021-08-06 20:55:04,143 INFO L78 Accepts]: Start accepts. Automaton has 10471 states and 24051 transitions. Word has length 30 [2021-08-06 20:55:04,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:55:04,143 INFO L470 AbstractCegarLoop]: Abstraction has 10471 states and 24051 transitions. [2021-08-06 20:55:04,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:04,144 INFO L276 IsEmpty]: Start isEmpty. Operand 10471 states and 24051 transitions. [2021-08-06 20:55:04,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:55:04,157 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:55:04,157 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:55:04,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-06 20:55:04,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:55:04,385 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:55:04,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:55:04,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1641134426, now seen corresponding path program 110 times [2021-08-06 20:55:04,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:55:04,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84930545] [2021-08-06 20:55:04,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:55:04,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:55:04,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:55:04,497 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:55:04,501 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:55:04,546 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 77.9 percent of original size [2021-08-06 20:55:04,550 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 77.9 percent of original size [2021-08-06 20:55:04,592 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 70.8 percent of original size [2021-08-06 20:55:04,595 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 70.8 percent of original size [2021-08-06 20:55:04,632 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:55:04,636 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:55:04,702 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 58.1 percent of original size [2021-08-06 20:55:04,703 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 58.1 percent of original size [2021-08-06 20:55:04,722 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 48.0 percent of original size [2021-08-06 20:55:04,723 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 48.0 percent of original size [2021-08-06 20:55:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:55:04,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:55:04,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84930545] [2021-08-06 20:55:04,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84930545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:55:04,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777015155] [2021-08-06 20:55:04,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:55:04,740 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:55:04,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:55:04,741 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:55:04,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-06 20:55:09,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:55:09,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:55:09,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:55:09,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:55:10,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:55:10,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:55:10,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:55:10,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-08-06 20:55:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:55:10,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777015155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:55:10,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:55:10,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 20:55:10,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725352957] [2021-08-06 20:55:10,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:55:10,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:55:10,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:55:10,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:55:10,362 INFO L87 Difference]: Start difference. First operand 10471 states and 24051 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:12,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:55:12,136 INFO L93 Difference]: Finished difference Result 14611 states and 33349 transitions. [2021-08-06 20:55:12,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:55:12,136 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:55:12,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:55:12,157 INFO L225 Difference]: With dead ends: 14611 [2021-08-06 20:55:12,157 INFO L226 Difference]: Without dead ends: 14602 [2021-08-06 20:55:12,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1475.4ms TimeCoverageRelationStatistics Valid=303, Invalid=1767, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:55:12,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2021-08-06 20:55:12,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 10471. [2021-08-06 20:55:12,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10471 states, 10470 states have (on average 2.297134670487106) internal successors, (24051), 10470 states have internal predecessors, (24051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:12,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10471 states to 10471 states and 24051 transitions. [2021-08-06 20:55:12,306 INFO L78 Accepts]: Start accepts. Automaton has 10471 states and 24051 transitions. Word has length 30 [2021-08-06 20:55:12,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:55:12,306 INFO L470 AbstractCegarLoop]: Abstraction has 10471 states and 24051 transitions. [2021-08-06 20:55:12,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:12,306 INFO L276 IsEmpty]: Start isEmpty. Operand 10471 states and 24051 transitions. [2021-08-06 20:55:12,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:55:12,316 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:55:12,316 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:55:12,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2021-08-06 20:55:12,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-08-06 20:55:12,517 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:55:12,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:55:12,517 INFO L82 PathProgramCache]: Analyzing trace with hash -133292254, now seen corresponding path program 111 times [2021-08-06 20:55:12,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:55:12,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992919881] [2021-08-06 20:55:12,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:55:12,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:55:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:55:12,639 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:55:12,645 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:55:12,704 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 77.9 percent of original size [2021-08-06 20:55:12,710 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 77.9 percent of original size [2021-08-06 20:55:12,753 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 70.8 percent of original size [2021-08-06 20:55:12,756 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 70.8 percent of original size [2021-08-06 20:55:12,793 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:55:12,796 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:55:12,853 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 58.1 percent of original size [2021-08-06 20:55:12,854 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 58.1 percent of original size [2021-08-06 20:55:12,873 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 48.0 percent of original size [2021-08-06 20:55:12,874 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 48.0 percent of original size [2021-08-06 20:55:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:55:12,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:55:12,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992919881] [2021-08-06 20:55:12,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992919881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:55:12,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268252250] [2021-08-06 20:55:12,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:55:12,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:55:12,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:55:12,891 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:55:12,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-06 20:55:17,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:55:17,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:55:17,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 20:55:17,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:55:18,651 INFO L354 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2021-08-06 20:55:18,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 114 [2021-08-06 20:55:18,711 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 63.9 percent of original size [2021-08-06 20:55:18,873 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 63.9 percent of original size [2021-08-06 20:55:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:55:19,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268252250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:55:19,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:55:19,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 25 [2021-08-06 20:55:19,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241148686] [2021-08-06 20:55:19,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:55:19,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:55:19,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:55:19,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:55:19,386 INFO L87 Difference]: Start difference. First operand 10471 states and 24051 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:21,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:55:21,114 INFO L93 Difference]: Finished difference Result 13433 states and 30721 transitions. [2021-08-06 20:55:21,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:55:21,115 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:55:21,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:55:21,133 INFO L225 Difference]: With dead ends: 13433 [2021-08-06 20:55:21,133 INFO L226 Difference]: Without dead ends: 13423 [2021-08-06 20:55:21,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1532.0ms TimeCoverageRelationStatistics Valid=315, Invalid=1847, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 20:55:21,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13423 states. [2021-08-06 20:55:21,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13423 to 10476. [2021-08-06 20:55:21,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10476 states, 10475 states have (on average 2.2973747016706443) internal successors, (24065), 10475 states have internal predecessors, (24065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:21,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10476 states to 10476 states and 24065 transitions. [2021-08-06 20:55:21,277 INFO L78 Accepts]: Start accepts. Automaton has 10476 states and 24065 transitions. Word has length 30 [2021-08-06 20:55:21,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:55:21,277 INFO L470 AbstractCegarLoop]: Abstraction has 10476 states and 24065 transitions. [2021-08-06 20:55:21,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:21,277 INFO L276 IsEmpty]: Start isEmpty. Operand 10476 states and 24065 transitions. [2021-08-06 20:55:21,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:55:21,287 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:55:21,287 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:55:21,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-08-06 20:55:21,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-06 20:55:21,489 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:55:21,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:55:21,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1250661154, now seen corresponding path program 112 times [2021-08-06 20:55:21,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:55:21,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578432815] [2021-08-06 20:55:21,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:55:21,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:55:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:55:21,611 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:55:21,617 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.7 percent of original size [2021-08-06 20:55:21,672 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 77.9 percent of original size [2021-08-06 20:55:21,676 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 77.9 percent of original size [2021-08-06 20:55:21,719 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 70.8 percent of original size [2021-08-06 20:55:21,723 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 70.8 percent of original size [2021-08-06 20:55:21,799 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 58.1 percent of original size [2021-08-06 20:55:21,800 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 58.1 percent of original size [2021-08-06 20:55:21,819 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 48.0 percent of original size [2021-08-06 20:55:21,820 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 48.0 percent of original size [2021-08-06 20:55:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:55:21,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:55:21,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578432815] [2021-08-06 20:55:21,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578432815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:55:21,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722890270] [2021-08-06 20:55:21,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:55:21,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:55:21,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:55:21,838 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:55:21,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-06 20:55:26,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:55:26,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:55:26,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:55:26,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:55:27,488 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-08-06 20:55:27,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 84 [2021-08-06 20:55:27,572 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 55.6 percent of original size [2021-08-06 20:55:27,573 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 55.6 percent of original size [2021-08-06 20:55:27,662 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:55:27,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722890270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:55:27,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:55:27,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:55:27,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980878660] [2021-08-06 20:55:27,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:55:27,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:55:27,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:55:27,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:55:27,662 INFO L87 Difference]: Start difference. First operand 10476 states and 24065 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:28,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:55:28,853 INFO L93 Difference]: Finished difference Result 13457 states and 30765 transitions. [2021-08-06 20:55:28,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:55:28,854 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:55:28,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:55:28,872 INFO L225 Difference]: With dead ends: 13457 [2021-08-06 20:55:28,872 INFO L226 Difference]: Without dead ends: 13452 [2021-08-06 20:55:28,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 973.2ms TimeCoverageRelationStatistics Valid=274, Invalid=1366, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:55:28,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13452 states. [2021-08-06 20:55:28,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13452 to 10478. [2021-08-06 20:55:28,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10478 states, 10477 states have (on average 2.2973179345232415) internal successors, (24069), 10477 states have internal predecessors, (24069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:29,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10478 states to 10478 states and 24069 transitions. [2021-08-06 20:55:29,011 INFO L78 Accepts]: Start accepts. Automaton has 10478 states and 24069 transitions. Word has length 30 [2021-08-06 20:55:29,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:55:29,011 INFO L470 AbstractCegarLoop]: Abstraction has 10478 states and 24069 transitions. [2021-08-06 20:55:29,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:29,012 INFO L276 IsEmpty]: Start isEmpty. Operand 10478 states and 24069 transitions. [2021-08-06 20:55:29,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:55:29,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:55:29,021 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:55:29,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2021-08-06 20:55:29,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-06 20:55:29,222 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:55:29,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:55:29,222 INFO L82 PathProgramCache]: Analyzing trace with hash -617522082, now seen corresponding path program 113 times [2021-08-06 20:55:29,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:55:29,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953451647] [2021-08-06 20:55:29,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:55:29,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:55:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:55:29,333 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:55:29,340 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 84.4 percent of original size [2021-08-06 20:55:29,401 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.9 percent of original size [2021-08-06 20:55:29,406 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.9 percent of original size [2021-08-06 20:55:29,541 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:55:29,542 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:55:29,556 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:55:29,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:55:29,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953451647] [2021-08-06 20:55:29,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953451647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:55:29,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379323784] [2021-08-06 20:55:29,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:55:29,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:55:29,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:55:29,557 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:55:29,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-06 20:55:34,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:55:34,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:55:34,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 20:55:34,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:55:35,425 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-08-06 20:55:35,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 56 [2021-08-06 20:55:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:55:35,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379323784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:55:35,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:55:35,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:55:35,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621126635] [2021-08-06 20:55:35,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:55:35,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:55:35,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:55:35,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:55:35,504 INFO L87 Difference]: Start difference. First operand 10478 states and 24069 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-06 20:55:36,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:55:36,898 INFO L93 Difference]: Finished difference Result 13627 states and 31075 transitions. [2021-08-06 20:55:36,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:55:36,899 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-08-06 20:55:36,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:55:36,918 INFO L225 Difference]: With dead ends: 13627 [2021-08-06 20:55:36,918 INFO L226 Difference]: Without dead ends: 13617 [2021-08-06 20:55:36,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1211.7ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:55:36,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13617 states. [2021-08-06 20:55:37,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13617 to 10489. [2021-08-06 20:55:37,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10489 states, 10488 states have (on average 2.2981502669717773) internal successors, (24103), 10488 states have internal predecessors, (24103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:37,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10489 states to 10489 states and 24103 transitions. [2021-08-06 20:55:37,101 INFO L78 Accepts]: Start accepts. Automaton has 10489 states and 24103 transitions. Word has length 30 [2021-08-06 20:55:37,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:55:37,101 INFO L470 AbstractCegarLoop]: Abstraction has 10489 states and 24103 transitions. [2021-08-06 20:55:37,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-06 20:55:37,101 INFO L276 IsEmpty]: Start isEmpty. Operand 10489 states and 24103 transitions. [2021-08-06 20:55:37,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:55:37,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:55:37,111 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:55:37,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2021-08-06 20:55:37,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:55:37,312 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:55:37,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:55:37,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1490047966, now seen corresponding path program 114 times [2021-08-06 20:55:37,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:55:37,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104773447] [2021-08-06 20:55:37,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:55:37,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:55:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:55:37,387 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 70, result has 46.6 percent of original size [2021-08-06 20:55:37,392 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 70, result has 46.6 percent of original size [2021-08-06 20:55:37,430 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 88.3 percent of original size [2021-08-06 20:55:37,433 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 88.3 percent of original size [2021-08-06 20:55:37,472 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 89.4 percent of original size [2021-08-06 20:55:37,476 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 89.4 percent of original size [2021-08-06 20:55:37,522 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 87.3 percent of original size [2021-08-06 20:55:37,526 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 87.3 percent of original size [2021-08-06 20:55:37,571 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 49, result has 60.5 percent of original size [2021-08-06 20:55:37,577 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 49, result has 60.5 percent of original size [2021-08-06 20:55:37,687 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:55:37,688 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:55:37,707 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:55:37,708 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:55:37,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:55:37,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:55:37,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104773447] [2021-08-06 20:55:37,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104773447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:55:37,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23867730] [2021-08-06 20:55:37,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:55:37,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:55:37,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:55:37,726 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:55:37,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-06 20:55:42,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:55:42,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:55:42,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 20:55:42,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:55:43,779 INFO L354 Elim1Store]: treesize reduction 74, result has 38.8 percent of original size [2021-08-06 20:55:43,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 67 treesize of output 101 [2021-08-06 20:55:44,566 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 51, result has 58.2 percent of original size [2021-08-06 20:55:44,571 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 51, result has 58.2 percent of original size [2021-08-06 20:55:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:55:44,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23867730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:55:44,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:55:44,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 25 [2021-08-06 20:55:44,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385599417] [2021-08-06 20:55:44,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:55:44,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:55:44,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:55:44,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:55:44,683 INFO L87 Difference]: Start difference. First operand 10489 states and 24103 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:48,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:55:48,091 INFO L93 Difference]: Finished difference Result 11521 states and 25882 transitions. [2021-08-06 20:55:48,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-06 20:55:48,091 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:55:48,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:55:48,113 INFO L225 Difference]: With dead ends: 11521 [2021-08-06 20:55:48,113 INFO L226 Difference]: Without dead ends: 11511 [2021-08-06 20:55:48,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 3205.7ms TimeCoverageRelationStatistics Valid=504, Invalid=4052, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 20:55:48,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11511 states. [2021-08-06 20:55:48,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11511 to 10499. [2021-08-06 20:55:48,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10499 states, 10498 states have (on average 2.298437797675748) internal successors, (24129), 10498 states have internal predecessors, (24129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:48,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10499 states to 10499 states and 24129 transitions. [2021-08-06 20:55:48,282 INFO L78 Accepts]: Start accepts. Automaton has 10499 states and 24129 transitions. Word has length 30 [2021-08-06 20:55:48,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:55:48,282 INFO L470 AbstractCegarLoop]: Abstraction has 10499 states and 24129 transitions. [2021-08-06 20:55:48,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:55:48,282 INFO L276 IsEmpty]: Start isEmpty. Operand 10499 states and 24129 transitions. [2021-08-06 20:55:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:55:48,292 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:55:48,292 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:55:48,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2021-08-06 20:55:48,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-08-06 20:55:48,492 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:55:48,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:55:48,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1446946, now seen corresponding path program 115 times [2021-08-06 20:55:48,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:55:48,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818685394] [2021-08-06 20:55:48,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:55:48,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:55:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:55:48,677 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 71.6 percent of original size [2021-08-06 20:55:48,682 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 71.6 percent of original size [2021-08-06 20:55:48,822 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:55:48,824 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 62.1 percent of original size [2021-08-06 20:55:48,853 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:55:48,854 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 52.2 percent of original size [2021-08-06 20:55:48,879 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:55:48,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:55:48,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818685394] [2021-08-06 20:55:48,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818685394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:55:48,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028728426] [2021-08-06 20:55:48,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:55:48,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:55:48,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:55:48,881 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:55:48,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-06 20:55:54,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:55:54,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:55:54,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:55:54,804 INFO L354 Elim1Store]: treesize reduction 66, result has 9.6 percent of original size [2021-08-06 20:55:54,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 43 treesize of output 37 [2021-08-06 20:55:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:55:54,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028728426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:55:54,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:55:54,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:55:54,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126693144] [2021-08-06 20:55:54,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:55:54,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:55:54,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:55:54,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:55:54,887 INFO L87 Difference]: Start difference. First operand 10499 states and 24129 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-08-06 20:55:55,536 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 20:55:55,536 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 [2021-08-06 20:55:55,537 WARN L223 SmtUtils]: Removed 9 from assertion stack [2021-08-06 20:55:55,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:55:55,538 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 20:55:55,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2021-08-06 20:55:55,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-08-06 20:55:55,738 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (10499states) and FLOYD_HOARE automaton (currently 17 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 39 for 36ms.. [2021-08-06 20:55:55,739 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 20:55:55,740 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 20:55:55,740 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 20:55:55,743 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 20:55:55,743 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 20:55:55,745 INFO L202 PluginConnector]: Adding new model sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 08:55:55 BasicIcfg [2021-08-06 20:55:55,745 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 20:55:55,745 INFO L168 Benchmark]: Toolchain (without parser) took 711515.83 ms. Allocated memory was 179.3 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 160.3 MB in the beginning and 370.4 MB in the end (delta: -210.1 MB). Peak memory consumption was 2.2 GB. Max. memory is 8.0 GB. [2021-08-06 20:55:55,745 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.49 ms. Allocated memory is still 179.3 MB. Free memory is still 161.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:55:55,745 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.08 ms. Allocated memory is still 179.3 MB. Free memory was 160.2 MB in the beginning and 158.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:55:55,745 INFO L168 Benchmark]: Boogie Preprocessor took 19.19 ms. Allocated memory is still 179.3 MB. Free memory was 158.8 MB in the beginning and 157.8 MB in the end (delta: 977.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:55:55,746 INFO L168 Benchmark]: RCFGBuilder took 260.61 ms. Allocated memory is still 179.3 MB. Free memory was 157.7 MB in the beginning and 144.5 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-06 20:55:55,746 INFO L168 Benchmark]: TraceAbstraction took 711205.48 ms. Allocated memory was 179.3 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 144.0 MB in the beginning and 370.4 MB in the end (delta: -226.4 MB). Peak memory consumption was 2.2 GB. Max. memory is 8.0 GB. [2021-08-06 20:55:55,746 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 0.49 ms. Allocated memory is still 179.3 MB. Free memory is still 161.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 26.08 ms. Allocated memory is still 179.3 MB. Free memory was 160.2 MB in the beginning and 158.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.19 ms. Allocated memory is still 179.3 MB. Free memory was 158.8 MB in the beginning and 157.8 MB in the end (delta: 977.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 260.61 ms. Allocated memory is still 179.3 MB. Free memory was 157.7 MB in the beginning and 144.5 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 711205.48 ms. Allocated memory was 179.3 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 144.0 MB in the beginning and 370.4 MB in the end (delta: -226.4 MB). Peak memory consumption was 2.2 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 247, positive: 220, positive conditional: 220, positive unconditional: 0, negative: 27, negative conditional: 27, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 220, positive: 220, positive conditional: 0, positive unconditional: 220, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 72, positive: 72, positive conditional: 0, positive unconditional: 72, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 72, positive: 72, positive conditional: 0, positive unconditional: 72, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 220, positive: 148, positive conditional: 0, positive unconditional: 148, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 72, unknown conditional: 0, unknown unconditional: 72] , Statistics on independence cache: Total cache size (in pairs): 72, Positive cache size: 72, Positive conditional cache size: 0, Positive unconditional cache size: 72, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 27 - 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: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (10499states) and FLOYD_HOARE automaton (currently 17 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 39 for 36ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (10499states) and FLOYD_HOARE automaton (currently 17 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 39 for 36ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (10499states) and FLOYD_HOARE automaton (currently 17 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 39 for 36ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (10499states) and FLOYD_HOARE automaton (currently 17 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 39 for 36ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 711123.7ms, OverallIterations: 149, TraceHistogramMax: 3, EmptinessCheckTime: 780.1ms, AutomataDifference: 198482.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 149.9ms, PartialOrderReductionTime: 136.6ms, HoareTripleCheckerStatistics: 3990 SDtfs, 24320 SDslu, 32641 SDs, 0 SdLazy, 80948 SolverSat, 5291 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 47891.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8891 GetRequests, 3030 SyntacticMatches, 230 SemanticMatches, 5630 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77250 ImplicationChecksByTransitivity, 171456.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=10499occurred in iteration=148, InterpolantAutomatonStates: 4467, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 10894.7ms AutomataMinimizationTime, 148 MinimizatonAttempts, 204290 StatesRemovedByMinimization, 147 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 516.0ms SsaConstructionTime, 2254.2ms SatisfiabilityAnalysisTime, 122179.9ms InterpolantComputationTime, 8210 NumberOfCodeBlocks, 8210 NumberOfCodeBlocksAsserted, 499 NumberOfCheckSat, 7914 ConstructedInterpolants, 322 QuantifiedInterpolants, 123125 SizeOfPredicates, 813 NumberOfNonLiveVariables, 10656 ConjunctsInSsa, 3187 ConjunctsInUnsatCore, 296 InterpolantComputations, 2 PerfectInterpolantSequences, 386/2949 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