/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/max-array-hom.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:32:43,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:32:43,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:32:43,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 18:32:43,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 18:32:43,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 18:32:43,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 18:32:43,923 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 [2021-08-21 18:32:43,951 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:32:43,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:32:43,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:32:43,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:32:43,954 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:32:43,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:32:43,954 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:32:43,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:32:43,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:32:43,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:32:43,955 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:32:43,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:32:43,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:32:43,956 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:32:43,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:32:43,956 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:32:43,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:32:43,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:32:43,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:32:43,956 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:32:43,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:32:43,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:32:43,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:32:43,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:32:43,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:32:43,957 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:32:43,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:32:43,957 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:32:43,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:32:43,957 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:32:43,957 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:32:44,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:32:44,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:32:44,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:32:44,203 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:32:44,204 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:32:44,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array-hom.wvr.bpl [2021-08-21 18:32:44,205 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array-hom.wvr.bpl' [2021-08-21 18:32:44,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:32:44,225 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:32:44,225 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:32:44,226 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:32:44,226 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:32:44,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:32:44" (1/1) ... [2021-08-21 18:32:44,238 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:32:44" (1/1) ... [2021-08-21 18:32:44,244 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:32:44,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:32:44,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:32:44,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:32:44,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:32:44" (1/1) ... [2021-08-21 18:32:44,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:32:44" (1/1) ... [2021-08-21 18:32:44,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:32:44" (1/1) ... [2021-08-21 18:32:44,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:32:44" (1/1) ... [2021-08-21 18:32:44,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:32:44" (1/1) ... [2021-08-21 18:32:44,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:32:44" (1/1) ... [2021-08-21 18:32:44,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:32:44" (1/1) ... [2021-08-21 18:32:44,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:32:44,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:32:44,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:32:44,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:32:44,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:32:44" (1/1) ... [2021-08-21 18:32:44,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:32:44,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:44,278 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 18:32:44,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 18:32:44,323 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 18:32:44,324 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 18:32:44,324 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 18:32:44,324 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 18:32:44,324 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 18:32:44,324 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 18:32:44,324 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:32:44,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:32:44,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:32:44,325 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 18:32:44,325 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 18:32:44,325 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 18:32:44,325 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 18:32:44,465 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:32:44,465 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 18:32:44,467 INFO L202 PluginConnector]: Adding new model max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:32:44 BoogieIcfgContainer [2021-08-21 18:32:44,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:32:44,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:32:44,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:32:44,470 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:32:44,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:32:44" (1/2) ... [2021-08-21 18:32:44,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d56cc8c and model type max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:32:44, skipping insertion in model container [2021-08-21 18:32:44,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:32:44" (2/2) ... [2021-08-21 18:32:44,471 INFO L111 eAbstractionObserver]: Analyzing ICFG max-array-hom.wvr.bpl [2021-08-21 18:32:44,475 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:32:44,475 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:32:44,475 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:32:44,475 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:32:44,525 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 18:32:44,555 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:32:44,573 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 18:32:44,573 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 18:32:44,699 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) [2021-08-21 18:32:44,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 18:32:44,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:44,712 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:32:44,712 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:32:44,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:44,716 INFO L82 PathProgramCache]: Analyzing trace with hash -234537446, now seen corresponding path program 1 times [2021-08-21 18:32:44,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:44,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609589729] [2021-08-21 18:32:44,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:44,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:44,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:44,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609589729] [2021-08-21 18:32:44,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609589729] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:32:44,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:32:44,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:32:44,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238420468] [2021-08-21 18:32:44,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:32:44,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:44,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:32:44,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:32:44,896 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 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:44,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:44,915 INFO L93 Difference]: Finished difference Result 217 states and 269 transitions. [2021-08-21 18:32:44,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:32:44,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 18:32:44,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:44,922 INFO L225 Difference]: With dead ends: 217 [2021-08-21 18:32:44,922 INFO L226 Difference]: Without dead ends: 64 [2021-08-21 18:32:44,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:32:44,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-21 18:32:44,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2021-08-21 18:32:44,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:44,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 74 transitions. [2021-08-21 18:32:44,943 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 74 transitions. Word has length 18 [2021-08-21 18:32:44,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:44,944 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 74 transitions. [2021-08-21 18:32:44,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:44,944 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 74 transitions. [2021-08-21 18:32:44,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:32:44,945 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:44,945 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] [2021-08-21 18:32:44,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:32:44,945 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:32:44,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:44,946 INFO L82 PathProgramCache]: Analyzing trace with hash -518877060, now seen corresponding path program 1 times [2021-08-21 18:32:44,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:44,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619311722] [2021-08-21 18:32:44,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:44,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:32:45,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:45,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619311722] [2021-08-21 18:32:45,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619311722] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:32:45,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:32:45,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:32:45,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636375905] [2021-08-21 18:32:45,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:32:45,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:45,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:32:45,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:32:45,008 INFO L87 Difference]: Start difference. First operand 45 states and 74 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) [2021-08-21 18:32:45,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:45,047 INFO L93 Difference]: Finished difference Result 55 states and 98 transitions. [2021-08-21 18:32:45,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:32:45,048 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 [2021-08-21 18:32:45,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:45,050 INFO L225 Difference]: With dead ends: 55 [2021-08-21 18:32:45,050 INFO L226 Difference]: Without dead ends: 55 [2021-08-21 18:32:45,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:32:45,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-21 18:32:45,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2021-08-21 18:32:45,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.702127659574468) internal successors, (80), 47 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:45,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 80 transitions. [2021-08-21 18:32:45,060 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 80 transitions. Word has length 20 [2021-08-21 18:32:45,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:45,060 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 80 transitions. [2021-08-21 18:32:45,060 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) [2021-08-21 18:32:45,061 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 80 transitions. [2021-08-21 18:32:45,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:32:45,062 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:45,062 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] [2021-08-21 18:32:45,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 18:32:45,062 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:32:45,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:45,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1615051400, now seen corresponding path program 1 times [2021-08-21 18:32:45,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:45,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501573831] [2021-08-21 18:32:45,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:45,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:32:45,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:45,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501573831] [2021-08-21 18:32:45,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501573831] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:32:45,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:32:45,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:32:45,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789402090] [2021-08-21 18:32:45,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:32:45,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:45,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:32:45,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:32:45,132 INFO L87 Difference]: Start difference. First operand 48 states and 80 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:45,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:45,193 INFO L93 Difference]: Finished difference Result 66 states and 114 transitions. [2021-08-21 18:32:45,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:32:45,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 18:32:45,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:45,194 INFO L225 Difference]: With dead ends: 66 [2021-08-21 18:32:45,195 INFO L226 Difference]: Without dead ends: 66 [2021-08-21 18:32:45,195 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:32:45,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-21 18:32:45,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2021-08-21 18:32:45,198 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) [2021-08-21 18:32:45,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 98 transitions. [2021-08-21 18:32:45,198 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 98 transitions. Word has length 20 [2021-08-21 18:32:45,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:45,199 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 98 transitions. [2021-08-21 18:32:45,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:45,199 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 98 transitions. [2021-08-21 18:32:45,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:32:45,199 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:45,199 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] [2021-08-21 18:32:45,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 18:32:45,200 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:32:45,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:45,200 INFO L82 PathProgramCache]: Analyzing trace with hash 12486490, now seen corresponding path program 1 times [2021-08-21 18:32:45,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:45,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855039140] [2021-08-21 18:32:45,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:45,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:45,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:45,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:45,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855039140] [2021-08-21 18:32:45,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855039140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:45,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442181195] [2021-08-21 18:32:45,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:45,639 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:45,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:45,652 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:32:45,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 18:32:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:45,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:32:45,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:46,376 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:32:46,377 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 49 treesize of output 40 [2021-08-21 18:32:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:46,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442181195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:46,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:46,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 18:32:46,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100000862] [2021-08-21 18:32:46,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:32:46,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:46,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:32:46,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:32:46,524 INFO L87 Difference]: Start difference. First operand 57 states and 98 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:46,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:46,756 INFO L93 Difference]: Finished difference Result 121 states and 202 transitions. [2021-08-21 18:32:46,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:32:46,756 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 22 [2021-08-21 18:32:46,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:46,760 INFO L225 Difference]: With dead ends: 121 [2021-08-21 18:32:46,760 INFO L226 Difference]: Without dead ends: 116 [2021-08-21 18:32:46,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:32:46,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-21 18:32:46,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2021-08-21 18:32:46,776 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) [2021-08-21 18:32:46,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 138 transitions. [2021-08-21 18:32:46,776 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 138 transitions. Word has length 22 [2021-08-21 18:32:46,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:46,777 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 138 transitions. [2021-08-21 18:32:46,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:46,777 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 138 transitions. [2021-08-21 18:32:46,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:32:46,778 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:46,778 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] [2021-08-21 18:32:46,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 18:32:46,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:46,993 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:32:46,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:46,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1559898278, now seen corresponding path program 2 times [2021-08-21 18:32:46,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:46,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390926532] [2021-08-21 18:32:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:46,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:47,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:47,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:47,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390926532] [2021-08-21 18:32:47,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390926532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:47,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964228850] [2021-08-21 18:32:47,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:32:47,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:47,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:47,206 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:32:47,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 18:32:47,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:32:47,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:47,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:32:47,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:47,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:32:47,584 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 43 treesize of output 39 [2021-08-21 18:32:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:47,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964228850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:47,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:47,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 18:32:47,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834948379] [2021-08-21 18:32:47,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:32:47,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:47,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:32:47,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:32:47,936 INFO L87 Difference]: Start difference. First operand 75 states and 138 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-08-21 18:32:48,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:48,410 INFO L93 Difference]: Finished difference Result 159 states and 270 transitions. [2021-08-21 18:32:48,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:32:48,410 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 18:32:48,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:48,411 INFO L225 Difference]: With dead ends: 159 [2021-08-21 18:32:48,411 INFO L226 Difference]: Without dead ends: 154 [2021-08-21 18:32:48,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 475.1ms TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:32:48,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-21 18:32:48,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 77. [2021-08-21 18:32:48,415 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) [2021-08-21 18:32:48,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 143 transitions. [2021-08-21 18:32:48,415 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 143 transitions. Word has length 22 [2021-08-21 18:32:48,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:48,415 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 143 transitions. [2021-08-21 18:32:48,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-08-21 18:32:48,415 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 143 transitions. [2021-08-21 18:32:48,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:32:48,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:48,416 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] [2021-08-21 18:32:48,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 18:32:48,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:48,625 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:32:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:48,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1733588454, now seen corresponding path program 3 times [2021-08-21 18:32:48,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:48,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842356309] [2021-08-21 18:32:48,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:48,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:48,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:48,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842356309] [2021-08-21 18:32:48,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842356309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:48,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529663034] [2021-08-21 18:32:48,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:32:48,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:48,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:48,833 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:32:48,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 18:32:48,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:32:48,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:48,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:32:48,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:49,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:32:49,227 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 43 treesize of output 39 [2021-08-21 18:32:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:49,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529663034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:49,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:49,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 18:32:49,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161950853] [2021-08-21 18:32:49,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:32:49,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:49,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:32:49,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:32:49,622 INFO L87 Difference]: Start difference. First operand 77 states and 143 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-08-21 18:32:49,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:49,970 INFO L93 Difference]: Finished difference Result 134 states and 237 transitions. [2021-08-21 18:32:49,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:32:49,970 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 18:32:49,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:49,971 INFO L225 Difference]: With dead ends: 134 [2021-08-21 18:32:49,971 INFO L226 Difference]: Without dead ends: 129 [2021-08-21 18:32:49,971 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 384.1ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:32:49,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-08-21 18:32:49,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2021-08-21 18:32:49,974 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) [2021-08-21 18:32:49,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 151 transitions. [2021-08-21 18:32:49,974 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 151 transitions. Word has length 22 [2021-08-21 18:32:49,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:49,974 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 151 transitions. [2021-08-21 18:32:49,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-08-21 18:32:49,974 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 151 transitions. [2021-08-21 18:32:49,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:32:49,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:49,975 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] [2021-08-21 18:32:49,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 18:32:50,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:50,181 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:32:50,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:50,181 INFO L82 PathProgramCache]: Analyzing trace with hash 708303036, now seen corresponding path program 4 times [2021-08-21 18:32:50,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:50,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881337107] [2021-08-21 18:32:50,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:50,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:50,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:50,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:50,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881337107] [2021-08-21 18:32:50,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881337107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:50,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116711937] [2021-08-21 18:32:50,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:32:50,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:50,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:50,237 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:32:50,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 18:32:50,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:32:50,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:50,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:32:50,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:50,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:50,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116711937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:50,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:50,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 18:32:50,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613333008] [2021-08-21 18:32:50,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:32:50,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:50,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:32:50,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:32:50,539 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) [2021-08-21 18:32:50,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:50,685 INFO L93 Difference]: Finished difference Result 192 states and 333 transitions. [2021-08-21 18:32:50,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:32:50,685 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 [2021-08-21 18:32:50,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:50,686 INFO L225 Difference]: With dead ends: 192 [2021-08-21 18:32:50,686 INFO L226 Difference]: Without dead ends: 192 [2021-08-21 18:32:50,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:32:50,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-21 18:32:50,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 97. [2021-08-21 18:32:50,694 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) [2021-08-21 18:32:50,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-08-21 18:32:50,695 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 24 [2021-08-21 18:32:50,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:50,696 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-08-21 18:32:50,696 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) [2021-08-21 18:32:50,696 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-08-21 18:32:50,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:32:50,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:50,699 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] [2021-08-21 18:32:50,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 18:32:50,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:50,913 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:32:50,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:50,913 INFO L82 PathProgramCache]: Analyzing trace with hash -783191876, now seen corresponding path program 5 times [2021-08-21 18:32:50,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:50,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454657364] [2021-08-21 18:32:50,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:50,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:50,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:50,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454657364] [2021-08-21 18:32:50,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454657364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:50,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964902141] [2021-08-21 18:32:50,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:32:50,964 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:50,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:50,967 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:32:50,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 18:32:51,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:32:51,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:51,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:32:51,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:51,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964902141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:51,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:51,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 18:32:51,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763196327] [2021-08-21 18:32:51,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:32:51,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:51,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:32:51,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:32:51,309 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) [2021-08-21 18:32:51,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:51,638 INFO L93 Difference]: Finished difference Result 254 states and 436 transitions. [2021-08-21 18:32:51,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:32:51,638 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 [2021-08-21 18:32:51,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:51,639 INFO L225 Difference]: With dead ends: 254 [2021-08-21 18:32:51,640 INFO L226 Difference]: Without dead ends: 254 [2021-08-21 18:32:51,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 214.3ms TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:32:51,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-08-21 18:32:51,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 99. [2021-08-21 18:32:51,644 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) [2021-08-21 18:32:51,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 197 transitions. [2021-08-21 18:32:51,645 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 197 transitions. Word has length 24 [2021-08-21 18:32:51,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:51,645 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 197 transitions. [2021-08-21 18:32:51,645 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) [2021-08-21 18:32:51,645 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 197 transitions. [2021-08-21 18:32:51,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:32:51,646 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:51,646 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] [2021-08-21 18:32:51,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 18:32:51,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:51,853 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:32:51,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:51,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1401497400, now seen corresponding path program 1 times [2021-08-21 18:32:51,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:51,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063250583] [2021-08-21 18:32:51,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:51,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:32:51,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:51,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063250583] [2021-08-21 18:32:51,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063250583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:51,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097504182] [2021-08-21 18:32:51,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:51,905 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:51,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:51,909 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:32:51,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 18:32:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:52,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:32:52,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:32:52,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097504182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:52,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:52,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 18:32:52,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769766118] [2021-08-21 18:32:52,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:32:52,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:52,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:32:52,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:32:52,217 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) [2021-08-21 18:32:52,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:52,279 INFO L93 Difference]: Finished difference Result 206 states and 383 transitions. [2021-08-21 18:32:52,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:32:52,279 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 [2021-08-21 18:32:52,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:52,280 INFO L225 Difference]: With dead ends: 206 [2021-08-21 18:32:52,280 INFO L226 Difference]: Without dead ends: 206 [2021-08-21 18:32:52,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:32:52,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-21 18:32:52,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2021-08-21 18:32:52,287 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) [2021-08-21 18:32:52,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 301 transitions. [2021-08-21 18:32:52,288 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 301 transitions. Word has length 24 [2021-08-21 18:32:52,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:52,288 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 301 transitions. [2021-08-21 18:32:52,288 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) [2021-08-21 18:32:52,288 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 301 transitions. [2021-08-21 18:32:52,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:32:52,289 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:52,289 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] [2021-08-21 18:32:52,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 18:32:52,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:52,498 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:32:52,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:52,498 INFO L82 PathProgramCache]: Analyzing trace with hash -448250184, now seen corresponding path program 6 times [2021-08-21 18:32:52,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:52,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461288727] [2021-08-21 18:32:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:52,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:52,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:52,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461288727] [2021-08-21 18:32:52,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461288727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:52,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224550781] [2021-08-21 18:32:52,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:32:52,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:52,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:52,549 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:32:52,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 18:32:52,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:32:52,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:52,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:32:52,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:52,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224550781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:52,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:52,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 18:32:52,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912352294] [2021-08-21 18:32:52,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:32:52,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:52,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:32:52,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:32:52,935 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) [2021-08-21 18:32:53,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:53,037 INFO L93 Difference]: Finished difference Result 230 states and 441 transitions. [2021-08-21 18:32:53,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:32:53,037 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 [2021-08-21 18:32:53,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:53,038 INFO L225 Difference]: With dead ends: 230 [2021-08-21 18:32:53,038 INFO L226 Difference]: Without dead ends: 218 [2021-08-21 18:32:53,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:32:53,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-08-21 18:32:53,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 183. [2021-08-21 18:32:53,042 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) [2021-08-21 18:32:53,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 372 transitions. [2021-08-21 18:32:53,042 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 372 transitions. Word has length 24 [2021-08-21 18:32:53,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:53,042 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 372 transitions. [2021-08-21 18:32:53,042 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) [2021-08-21 18:32:53,043 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 372 transitions. [2021-08-21 18:32:53,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:32:53,043 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:53,043 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] [2021-08-21 18:32:53,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 18:32:53,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:53,253 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:32:53,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:53,253 INFO L82 PathProgramCache]: Analyzing trace with hash 605470520, now seen corresponding path program 2 times [2021-08-21 18:32:53,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:53,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74391332] [2021-08-21 18:32:53,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:53,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:32:53,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:53,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74391332] [2021-08-21 18:32:53,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74391332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:53,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392563564] [2021-08-21 18:32:53,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:32:53,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:53,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:53,313 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:32:53,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 18:32:53,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:32:53,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:53,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:32:53,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:32:53,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392563564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:53,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:53,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 18:32:53,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736443075] [2021-08-21 18:32:53,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:32:53,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:53,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:32:53,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:32:53,654 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) [2021-08-21 18:32:53,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:53,731 INFO L93 Difference]: Finished difference Result 221 states and 420 transitions. [2021-08-21 18:32:53,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:32:53,731 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 [2021-08-21 18:32:53,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:53,732 INFO L225 Difference]: With dead ends: 221 [2021-08-21 18:32:53,732 INFO L226 Difference]: Without dead ends: 221 [2021-08-21 18:32:53,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:32:53,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-08-21 18:32:53,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 171. [2021-08-21 18:32:53,736 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) [2021-08-21 18:32:53,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 341 transitions. [2021-08-21 18:32:53,736 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 341 transitions. Word has length 24 [2021-08-21 18:32:53,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:53,737 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 341 transitions. [2021-08-21 18:32:53,737 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) [2021-08-21 18:32:53,737 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 341 transitions. [2021-08-21 18:32:53,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:32:53,737 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:53,737 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] [2021-08-21 18:32:53,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 18:32:53,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-21 18:32:53,945 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:32:53,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:53,945 INFO L82 PathProgramCache]: Analyzing trace with hash 60653496, now seen corresponding path program 7 times [2021-08-21 18:32:53,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:53,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372964234] [2021-08-21 18:32:53,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:53,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:53,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:53,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372964234] [2021-08-21 18:32:53,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372964234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:53,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098013293] [2021-08-21 18:32:53,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:32:53,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:53,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:54,000 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:32:54,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 18:32:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:54,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:32:54,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:54,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098013293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:54,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:54,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 18:32:54,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893528947] [2021-08-21 18:32:54,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:32:54,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:54,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:32:54,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:32:54,399 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) [2021-08-21 18:32:54,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:54,937 INFO L93 Difference]: Finished difference Result 577 states and 984 transitions. [2021-08-21 18:32:54,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:32:54,937 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 [2021-08-21 18:32:54,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:54,942 INFO L225 Difference]: With dead ends: 577 [2021-08-21 18:32:54,942 INFO L226 Difference]: Without dead ends: 577 [2021-08-21 18:32:54,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 372.7ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:32:54,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-08-21 18:32:54,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 183. [2021-08-21 18:32:54,950 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) [2021-08-21 18:32:54,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 374 transitions. [2021-08-21 18:32:54,951 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 374 transitions. Word has length 24 [2021-08-21 18:32:54,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:54,951 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 374 transitions. [2021-08-21 18:32:54,951 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) [2021-08-21 18:32:54,951 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 374 transitions. [2021-08-21 18:32:54,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:32:54,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:54,952 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] [2021-08-21 18:32:54,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 18:32:55,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:55,170 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:32:55,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:55,170 INFO L82 PathProgramCache]: Analyzing trace with hash 318475960, now seen corresponding path program 8 times [2021-08-21 18:32:55,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:55,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784316243] [2021-08-21 18:32:55,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:55,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:55,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:55,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784316243] [2021-08-21 18:32:55,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784316243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:55,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838972288] [2021-08-21 18:32:55,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:32:55,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:55,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:55,229 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:32:55,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 18:32:55,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:32:55,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:55,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:32:55,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:55,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838972288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:55,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:55,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 18:32:55,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519571207] [2021-08-21 18:32:55,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:32:55,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:55,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:32:55,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:32:55,595 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) [2021-08-21 18:32:55,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:55,775 INFO L93 Difference]: Finished difference Result 355 states and 658 transitions. [2021-08-21 18:32:55,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:32:55,776 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 [2021-08-21 18:32:55,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:55,777 INFO L225 Difference]: With dead ends: 355 [2021-08-21 18:32:55,777 INFO L226 Difference]: Without dead ends: 351 [2021-08-21 18:32:55,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:32:55,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-08-21 18:32:55,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 240. [2021-08-21 18:32:55,781 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) [2021-08-21 18:32:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 506 transitions. [2021-08-21 18:32:55,782 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 506 transitions. Word has length 24 [2021-08-21 18:32:55,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:55,783 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 506 transitions. [2021-08-21 18:32:55,783 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) [2021-08-21 18:32:55,783 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 506 transitions. [2021-08-21 18:32:55,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:32:55,783 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:55,784 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] [2021-08-21 18:32:55,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 18:32:55,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 18:32:55,995 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:32:55,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:55,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1253908808, now seen corresponding path program 9 times [2021-08-21 18:32:55,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:55,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887358117] [2021-08-21 18:32:55,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:55,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:56,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:56,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887358117] [2021-08-21 18:32:56,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887358117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:56,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058879947] [2021-08-21 18:32:56,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:32:56,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:56,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:56,056 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:32:56,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 18:32:56,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:32:56,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:56,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:32:56,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:56,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058879947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:56,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:56,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 18:32:56,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537760631] [2021-08-21 18:32:56,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:32:56,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:56,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:32:56,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:32:56,451 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) [2021-08-21 18:32:56,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:56,689 INFO L93 Difference]: Finished difference Result 370 states and 706 transitions. [2021-08-21 18:32:56,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:32:56,689 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 [2021-08-21 18:32:56,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:56,691 INFO L225 Difference]: With dead ends: 370 [2021-08-21 18:32:56,691 INFO L226 Difference]: Without dead ends: 370 [2021-08-21 18:32:56,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 172.5ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:32:56,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-08-21 18:32:56,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 253. [2021-08-21 18:32:56,695 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) [2021-08-21 18:32:56,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 528 transitions. [2021-08-21 18:32:56,696 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 528 transitions. Word has length 24 [2021-08-21 18:32:56,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:56,696 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 528 transitions. [2021-08-21 18:32:56,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:56,696 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 528 transitions. [2021-08-21 18:32:56,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:32:56,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:56,697 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] [2021-08-21 18:32:56,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 18:32:56,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 18:32:56,905 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:32:56,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:56,905 INFO L82 PathProgramCache]: Analyzing trace with hash 351717368, now seen corresponding path program 3 times [2021-08-21 18:32:56,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:56,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756567611] [2021-08-21 18:32:56,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:56,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:32:56,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:56,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756567611] [2021-08-21 18:32:56,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756567611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:56,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147265209] [2021-08-21 18:32:56,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:32:56,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:56,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:56,945 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:32:56,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 18:32:57,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:32:57,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:57,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:32:57,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:32:57,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147265209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:57,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:57,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-08-21 18:32:57,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019795] [2021-08-21 18:32:57,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:32:57,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:57,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:32:57,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:32:57,311 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) [2021-08-21 18:32:57,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:57,388 INFO L93 Difference]: Finished difference Result 273 states and 566 transitions. [2021-08-21 18:32:57,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:32:57,389 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 [2021-08-21 18:32:57,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:57,390 INFO L225 Difference]: With dead ends: 273 [2021-08-21 18:32:57,390 INFO L226 Difference]: Without dead ends: 273 [2021-08-21 18:32:57,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:32:57,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-08-21 18:32:57,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 233. [2021-08-21 18:32:57,393 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) [2021-08-21 18:32:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 494 transitions. [2021-08-21 18:32:57,394 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 494 transitions. Word has length 24 [2021-08-21 18:32:57,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:57,394 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 494 transitions. [2021-08-21 18:32:57,394 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) [2021-08-21 18:32:57,394 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 494 transitions. [2021-08-21 18:32:57,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:32:57,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:57,398 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] [2021-08-21 18:32:57,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 18:32:57,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 18:32:57,609 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:32:57,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:57,609 INFO L82 PathProgramCache]: Analyzing trace with hash 648118904, now seen corresponding path program 10 times [2021-08-21 18:32:57,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:57,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955578428] [2021-08-21 18:32:57,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:57,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:57,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:57,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:57,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955578428] [2021-08-21 18:32:57,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955578428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:57,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777612865] [2021-08-21 18:32:57,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:32:57,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:57,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:57,658 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:32:57,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 18:32:57,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:32:57,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:57,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:32:57,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:58,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777612865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:58,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:58,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 18:32:58,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387865051] [2021-08-21 18:32:58,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:32:58,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:58,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:32:58,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:32:58,088 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) [2021-08-21 18:32:58,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:58,391 INFO L93 Difference]: Finished difference Result 604 states and 1149 transitions. [2021-08-21 18:32:58,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:32:58,392 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 [2021-08-21 18:32:58,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:58,394 INFO L225 Difference]: With dead ends: 604 [2021-08-21 18:32:58,394 INFO L226 Difference]: Without dead ends: 604 [2021-08-21 18:32:58,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:32:58,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-08-21 18:32:58,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 283. [2021-08-21 18:32:58,400 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) [2021-08-21 18:32:58,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 612 transitions. [2021-08-21 18:32:58,401 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 612 transitions. Word has length 24 [2021-08-21 18:32:58,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:58,401 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 612 transitions. [2021-08-21 18:32:58,401 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) [2021-08-21 18:32:58,401 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 612 transitions. [2021-08-21 18:32:58,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:32:58,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:58,402 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] [2021-08-21 18:32:58,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 18:32:58,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 18:32:58,617 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:32:58,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:58,617 INFO L82 PathProgramCache]: Analyzing trace with hash 66299930, now seen corresponding path program 4 times [2021-08-21 18:32:58,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:58,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107509808] [2021-08-21 18:32:58,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:58,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:59,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:59,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107509808] [2021-08-21 18:32:59,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107509808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:59,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331303277] [2021-08-21 18:32:59,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:32:59,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:59,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:59,182 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:32:59,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 18:32:59,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:32:59,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:59,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 18:32:59,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:33:00,529 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:33:00,529 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 110 treesize of output 79 [2021-08-21 18:33:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:00,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331303277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:00,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:33:00,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:33:00,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541718211] [2021-08-21 18:33:00,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:33:00,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:33:00,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:33:00,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:33:00,967 INFO L87 Difference]: Start difference. First operand 283 states and 612 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:01,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:33:01,577 INFO L93 Difference]: Finished difference Result 423 states and 858 transitions. [2021-08-21 18:33:01,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:33:01,578 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-21 18:33:01,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:33:01,579 INFO L225 Difference]: With dead ends: 423 [2021-08-21 18:33:01,579 INFO L226 Difference]: Without dead ends: 418 [2021-08-21 18:33:01,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 814.1ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:33:01,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-08-21 18:33:01,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 292. [2021-08-21 18:33:01,586 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) [2021-08-21 18:33:01,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 634 transitions. [2021-08-21 18:33:01,587 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 634 transitions. Word has length 26 [2021-08-21 18:33:01,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:33:01,587 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 634 transitions. [2021-08-21 18:33:01,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:01,587 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 634 transitions. [2021-08-21 18:33:01,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:33:01,588 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:33:01,588 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] [2021-08-21 18:33:01,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 18:33:01,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:01,805 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:33:01,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:33:01,805 INFO L82 PathProgramCache]: Analyzing trace with hash 320089054, now seen corresponding path program 5 times [2021-08-21 18:33:01,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:33:01,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829437423] [2021-08-21 18:33:01,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:33:01,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:33:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:33:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:02,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:33:02,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829437423] [2021-08-21 18:33:02,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829437423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:02,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720822295] [2021-08-21 18:33:02,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:33:02,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:02,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:33:02,348 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:33:02,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 18:33:02,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:33:02,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:33:02,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:33:02,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:33:03,607 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:33:03,608 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 110 treesize of output 79 [2021-08-21 18:33:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:04,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720822295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:04,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:33:04,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 18:33:04,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038943152] [2021-08-21 18:33:04,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:33:04,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:33:04,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:33:04,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:33:04,150 INFO L87 Difference]: Start difference. First operand 292 states and 634 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:05,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:33:05,319 INFO L93 Difference]: Finished difference Result 415 states and 845 transitions. [2021-08-21 18:33:05,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:33:05,320 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:33:05,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:33:05,321 INFO L225 Difference]: With dead ends: 415 [2021-08-21 18:33:05,321 INFO L226 Difference]: Without dead ends: 410 [2021-08-21 18:33:05,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1317.8ms TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:33:05,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-21 18:33:05,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 296. [2021-08-21 18:33:05,326 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) [2021-08-21 18:33:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 640 transitions. [2021-08-21 18:33:05,327 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 640 transitions. Word has length 26 [2021-08-21 18:33:05,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:33:05,327 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 640 transitions. [2021-08-21 18:33:05,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:05,327 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 640 transitions. [2021-08-21 18:33:05,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:33:05,327 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:33:05,327 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] [2021-08-21 18:33:05,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 18:33:05,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 18:33:05,541 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:33:05,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:33:05,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1783447654, now seen corresponding path program 11 times [2021-08-21 18:33:05,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:33:05,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754375940] [2021-08-21 18:33:05,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:33:05,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:33:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:33:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:06,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:33:06,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754375940] [2021-08-21 18:33:06,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754375940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:06,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752604271] [2021-08-21 18:33:06,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:33:06,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:06,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:33:06,193 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:33:06,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 18:33:06,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:33:06,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:33:06,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:33:06,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:33:07,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:33:07,585 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-21 18:33:07,585 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 130 treesize of output 84 [2021-08-21 18:33:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:07,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752604271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:07,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:33:07,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 18:33:07,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061054797] [2021-08-21 18:33:07,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:33:07,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:33:07,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:33:07,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:33:07,795 INFO L87 Difference]: Start difference. First operand 296 states and 640 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:09,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:33:09,625 INFO L93 Difference]: Finished difference Result 351 states and 718 transitions. [2021-08-21 18:33:09,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:33:09,626 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:33:09,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:33:09,627 INFO L225 Difference]: With dead ends: 351 [2021-08-21 18:33:09,627 INFO L226 Difference]: Without dead ends: 346 [2021-08-21 18:33:09,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1967.3ms TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:33:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-08-21 18:33:09,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 304. [2021-08-21 18:33:09,632 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) [2021-08-21 18:33:09,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 653 transitions. [2021-08-21 18:33:09,632 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 653 transitions. Word has length 26 [2021-08-21 18:33:09,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:33:09,633 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 653 transitions. [2021-08-21 18:33:09,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:09,633 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 653 transitions. [2021-08-21 18:33:09,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:33:09,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:33:09,633 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] [2021-08-21 18:33:09,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 18:33:09,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:09,851 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:33:09,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:33:09,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1596416026, now seen corresponding path program 6 times [2021-08-21 18:33:09,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:33:09,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556293792] [2021-08-21 18:33:09,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:33:09,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:33:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:33:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:10,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:33:10,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556293792] [2021-08-21 18:33:10,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556293792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:10,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867553741] [2021-08-21 18:33:10,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:33:10,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:10,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:33:10,350 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:33:10,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 18:33:10,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:33:10,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:33:10,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:33:10,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:33:11,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:33:11,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:33:11,651 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 104 treesize of output 78 [2021-08-21 18:33:12,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:12,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867553741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:12,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:33:12,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 18:33:12,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470946845] [2021-08-21 18:33:12,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:33:12,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:33:12,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:33:12,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:33:12,430 INFO L87 Difference]: Start difference. First operand 304 states and 653 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:14,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:33:14,917 INFO L93 Difference]: Finished difference Result 508 states and 997 transitions. [2021-08-21 18:33:14,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:33:14,917 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:33:14,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:33:14,919 INFO L225 Difference]: With dead ends: 508 [2021-08-21 18:33:14,919 INFO L226 Difference]: Without dead ends: 503 [2021-08-21 18:33:14,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 2356.4ms TimeCoverageRelationStatistics Valid=235, Invalid=1325, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:33:14,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-08-21 18:33:14,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 310. [2021-08-21 18:33:14,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.168284789644013) internal successors, (670), 309 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:14,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 670 transitions. [2021-08-21 18:33:14,927 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 670 transitions. Word has length 26 [2021-08-21 18:33:14,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:33:14,927 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 670 transitions. [2021-08-21 18:33:14,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:14,927 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 670 transitions. [2021-08-21 18:33:14,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:33:14,928 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:33:14,928 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] [2021-08-21 18:33:14,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 18:33:15,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:15,139 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:33:15,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:33:15,139 INFO L82 PathProgramCache]: Analyzing trace with hash -729726950, now seen corresponding path program 7 times [2021-08-21 18:33:15,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:33:15,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730446227] [2021-08-21 18:33:15,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:33:15,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:33:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:33:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:15,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:33:15,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730446227] [2021-08-21 18:33:15,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730446227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:15,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744640647] [2021-08-21 18:33:15,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:33:15,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:15,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:33:15,615 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:33:15,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 18:33:16,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:33:16,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:33:16,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:33:17,246 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:33:17,246 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 110 treesize of output 79 [2021-08-21 18:33:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:17,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744640647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:17,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:33:17,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 18:33:17,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340232896] [2021-08-21 18:33:17,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:33:17,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:33:17,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:33:17,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:33:17,704 INFO L87 Difference]: Start difference. First operand 310 states and 670 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:19,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:33:19,841 INFO L93 Difference]: Finished difference Result 576 states and 1143 transitions. [2021-08-21 18:33:19,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:33:19,841 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:33:19,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:33:19,843 INFO L225 Difference]: With dead ends: 576 [2021-08-21 18:33:19,843 INFO L226 Difference]: Without dead ends: 571 [2021-08-21 18:33:19,843 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 2085.5ms TimeCoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:33:19,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-08-21 18:33:19,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 322. [2021-08-21 18:33:19,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.1806853582554515) internal successors, (700), 321 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 700 transitions. [2021-08-21 18:33:19,849 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 700 transitions. Word has length 26 [2021-08-21 18:33:19,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:33:19,849 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 700 transitions. [2021-08-21 18:33:19,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:19,850 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 700 transitions. [2021-08-21 18:33:19,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:33:19,850 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:33:19,850 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] [2021-08-21 18:33:19,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 18:33:20,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:20,068 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:33:20,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:33:20,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1992855578, now seen corresponding path program 8 times [2021-08-21 18:33:20,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:33:20,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671363444] [2021-08-21 18:33:20,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:33:20,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:33:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:33:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:20,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:33:20,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671363444] [2021-08-21 18:33:20,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671363444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:20,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933760241] [2021-08-21 18:33:20,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:33:20,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:20,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:33:20,536 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:33:20,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 18:33:21,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:33:21,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:33:21,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 18:33:21,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:33:21,990 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:33:21,990 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 112 treesize of output 86 [2021-08-21 18:33:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:23,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933760241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:23,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:33:23,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:33:23,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853786591] [2021-08-21 18:33:23,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:33:23,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:33:23,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:33:23,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:33:23,037 INFO L87 Difference]: Start difference. First operand 322 states and 700 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:25,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:33:25,016 INFO L93 Difference]: Finished difference Result 583 states and 1176 transitions. [2021-08-21 18:33:25,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:33:25,018 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-21 18:33:25,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:33:25,019 INFO L225 Difference]: With dead ends: 583 [2021-08-21 18:33:25,019 INFO L226 Difference]: Without dead ends: 578 [2021-08-21 18:33:25,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 2020.1ms TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:33:25,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-08-21 18:33:25,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 323. [2021-08-21 18:33:25,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.1770186335403725) internal successors, (701), 322 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:25,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 701 transitions. [2021-08-21 18:33:25,026 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 701 transitions. Word has length 26 [2021-08-21 18:33:25,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:33:25,026 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 701 transitions. [2021-08-21 18:33:25,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:25,026 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 701 transitions. [2021-08-21 18:33:25,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:33:25,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:33:25,027 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] [2021-08-21 18:33:25,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 18:33:25,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:25,234 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:33:25,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:33:25,234 INFO L82 PathProgramCache]: Analyzing trace with hash -121398562, now seen corresponding path program 9 times [2021-08-21 18:33:25,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:33:25,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407051150] [2021-08-21 18:33:25,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:33:25,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:33:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:33:25,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:25,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:33:25,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407051150] [2021-08-21 18:33:25,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407051150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:25,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269819695] [2021-08-21 18:33:25,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:33:25,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:25,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:33:25,767 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:33:25,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 18:33:26,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:33:26,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:33:26,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:33:26,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:33:27,697 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 18:33:27,698 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 120 treesize of output 102 [2021-08-21 18:33:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:29,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269819695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:29,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:33:29,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:33:29,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048299453] [2021-08-21 18:33:29,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:33:29,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:33:29,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:33:29,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:33:29,573 INFO L87 Difference]: Start difference. First operand 323 states and 701 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:30,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:33:30,728 INFO L93 Difference]: Finished difference Result 483 states and 984 transitions. [2021-08-21 18:33:30,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:33:30,728 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-21 18:33:30,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:33:30,730 INFO L225 Difference]: With dead ends: 483 [2021-08-21 18:33:30,730 INFO L226 Difference]: Without dead ends: 478 [2021-08-21 18:33:30,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1284.1ms TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:33:30,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-08-21 18:33:30,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 324. [2021-08-21 18:33:30,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.1733746130030958) internal successors, (702), 323 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:30,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 702 transitions. [2021-08-21 18:33:30,736 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 702 transitions. Word has length 26 [2021-08-21 18:33:30,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:33:30,736 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 702 transitions. [2021-08-21 18:33:30,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:30,736 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 702 transitions. [2021-08-21 18:33:30,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:33:30,737 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:33:30,737 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] [2021-08-21 18:33:30,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 18:33:30,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 18:33:30,957 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:33:30,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:33:30,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1016721510, now seen corresponding path program 12 times [2021-08-21 18:33:30,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:33:30,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82053024] [2021-08-21 18:33:30,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:33:30,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:33:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:33:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:31,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:33:31,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82053024] [2021-08-21 18:33:31,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82053024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:31,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652947192] [2021-08-21 18:33:31,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:33:31,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:31,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:33:31,514 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:33:31,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 18:33:32,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:33:32,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:33:32,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:33:32,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:33:34,207 INFO L354 Elim1Store]: treesize reduction 21, result has 57.1 percent of original size [2021-08-21 18:33:34,208 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 119 [2021-08-21 18:33:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:35,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652947192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:35,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:33:35,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-21 18:33:35,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694967486] [2021-08-21 18:33:35,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:33:35,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:33:35,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:33:35,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:33:35,349 INFO L87 Difference]: Start difference. First operand 324 states and 702 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-08-21 18:33:39,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:33:39,493 INFO L93 Difference]: Finished difference Result 418 states and 837 transitions. [2021-08-21 18:33:39,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 18:33:39,494 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) 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 26 [2021-08-21 18:33:39,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:33:39,495 INFO L225 Difference]: With dead ends: 418 [2021-08-21 18:33:39,495 INFO L226 Difference]: Without dead ends: 413 [2021-08-21 18:33:39,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 4067.8ms TimeCoverageRelationStatistics Valid=476, Invalid=2604, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:33:39,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-08-21 18:33:39,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 324. [2021-08-21 18:33:39,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.1733746130030958) internal successors, (702), 323 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:39,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 702 transitions. [2021-08-21 18:33:39,501 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 702 transitions. Word has length 26 [2021-08-21 18:33:39,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:33:39,501 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 702 transitions. [2021-08-21 18:33:39,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-08-21 18:33:39,501 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 702 transitions. [2021-08-21 18:33:39,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:33:39,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:33:39,502 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] [2021-08-21 18:33:39,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-21 18:33:39,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 18:33:39,713 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:33:39,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:33:39,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1786750874, now seen corresponding path program 13 times [2021-08-21 18:33:39,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:33:39,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405434032] [2021-08-21 18:33:39,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:33:39,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:33:39,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:33:40,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:40,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:33:40,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405434032] [2021-08-21 18:33:40,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405434032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:40,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696543833] [2021-08-21 18:33:40,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:33:40,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:40,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:33:40,309 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:33:40,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 18:33:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:33:41,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 18:33:41,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:33:42,249 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 18:33:42,249 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 116 treesize of output 82 [2021-08-21 18:33:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:42,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696543833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:42,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:33:42,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-21 18:33:42,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153433866] [2021-08-21 18:33:42,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:33:42,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:33:42,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:33:42,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:33:42,464 INFO L87 Difference]: Start difference. First operand 324 states and 702 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:46,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:33:46,339 INFO L93 Difference]: Finished difference Result 642 states and 1253 transitions. [2021-08-21 18:33:46,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:33:46,340 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:33:46,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:33:46,342 INFO L225 Difference]: With dead ends: 642 [2021-08-21 18:33:46,342 INFO L226 Difference]: Without dead ends: 627 [2021-08-21 18:33:46,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 3846.7ms TimeCoverageRelationStatistics Valid=562, Invalid=2860, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:33:46,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-08-21 18:33:46,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 337. [2021-08-21 18:33:46,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.1845238095238093) internal successors, (734), 336 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:46,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 734 transitions. [2021-08-21 18:33:46,348 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 734 transitions. Word has length 26 [2021-08-21 18:33:46,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:33:46,349 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 734 transitions. [2021-08-21 18:33:46,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:46,349 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 734 transitions. [2021-08-21 18:33:46,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:33:46,349 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:33:46,349 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] [2021-08-21 18:33:46,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 18:33:46,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:46,565 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:33:46,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:33:46,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1705861018, now seen corresponding path program 14 times [2021-08-21 18:33:46,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:33:46,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712792563] [2021-08-21 18:33:46,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:33:46,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:33:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:33:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:47,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:33:47,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712792563] [2021-08-21 18:33:47,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712792563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:47,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27089483] [2021-08-21 18:33:47,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:33:47,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:47,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:33:47,067 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:33:47,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 18:33:48,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:33:48,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:33:48,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:33:48,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:33:48,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:33:48,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:33:48,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:33:49,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:33:49,002 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 122 treesize of output 100 [2021-08-21 18:33:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:49,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27089483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:49,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:33:49,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-21 18:33:49,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761908575] [2021-08-21 18:33:49,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:33:49,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:33:49,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:33:49,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:33:49,885 INFO L87 Difference]: Start difference. First operand 337 states and 734 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:54,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:33:54,085 INFO L93 Difference]: Finished difference Result 723 states and 1408 transitions. [2021-08-21 18:33:54,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 18:33:54,085 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:33:54,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:33:54,087 INFO L225 Difference]: With dead ends: 723 [2021-08-21 18:33:54,087 INFO L226 Difference]: Without dead ends: 703 [2021-08-21 18:33:54,088 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 4040.2ms TimeCoverageRelationStatistics Valid=776, Invalid=2884, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:33:54,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-08-21 18:33:54,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 343. [2021-08-21 18:33:54,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.190058479532164) internal successors, (749), 342 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) [2021-08-21 18:33:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 749 transitions. [2021-08-21 18:33:54,094 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 749 transitions. Word has length 26 [2021-08-21 18:33:54,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:33:54,095 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 749 transitions. [2021-08-21 18:33:54,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:54,095 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 749 transitions. [2021-08-21 18:33:54,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:33:54,095 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:33:54,095 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] [2021-08-21 18:33:54,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 18:33:54,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:54,309 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:33:54,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:33:54,309 INFO L82 PathProgramCache]: Analyzing trace with hash -983480102, now seen corresponding path program 10 times [2021-08-21 18:33:54,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:33:54,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059636003] [2021-08-21 18:33:54,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:33:54,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:33:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:33:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:54,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:33:54,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059636003] [2021-08-21 18:33:54,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059636003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:54,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506165519] [2021-08-21 18:33:54,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:33:54,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:54,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:33:54,778 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:33:54,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 18:33:56,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:33:56,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:33:56,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 18:33:56,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:33:56,967 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:33:56,967 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 110 treesize of output 79 [2021-08-21 18:33:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:57,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506165519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:57,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:33:57,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:33:57,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743424311] [2021-08-21 18:33:57,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:33:57,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:33:57,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:33:57,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:33:57,340 INFO L87 Difference]: Start difference. First operand 343 states and 749 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:57,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:33:57,970 INFO L93 Difference]: Finished difference Result 476 states and 993 transitions. [2021-08-21 18:33:57,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:33:57,971 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-21 18:33:57,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:33:57,972 INFO L225 Difference]: With dead ends: 476 [2021-08-21 18:33:57,973 INFO L226 Difference]: Without dead ends: 471 [2021-08-21 18:33:57,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 783.7ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:33:57,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-08-21 18:33:57,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 351. [2021-08-21 18:33:57,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.1857142857142855) internal successors, (765), 350 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:57,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 765 transitions. [2021-08-21 18:33:57,978 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 765 transitions. Word has length 26 [2021-08-21 18:33:57,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:33:57,978 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 765 transitions. [2021-08-21 18:33:57,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:57,979 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 765 transitions. [2021-08-21 18:33:57,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:33:57,979 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:33:57,979 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] [2021-08-21 18:33:58,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 18:33:58,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 18:33:58,200 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:33:58,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:33:58,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1739102426, now seen corresponding path program 11 times [2021-08-21 18:33:58,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:33:58,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935246846] [2021-08-21 18:33:58,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:33:58,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:33:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:33:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:58,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:33:58,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935246846] [2021-08-21 18:33:58,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935246846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:58,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027887403] [2021-08-21 18:33:58,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:33:58,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:58,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:33:58,534 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:33:58,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 18:33:59,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:33:59,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:33:59,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:33:59,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:00,535 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:34:00,535 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 110 treesize of output 84 [2021-08-21 18:34:01,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:01,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027887403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:01,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:01,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 18:34:01,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417879885] [2021-08-21 18:34:01,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:34:01,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:01,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:34:01,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:34:01,669 INFO L87 Difference]: Start difference. First operand 351 states and 765 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:03,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:03,357 INFO L93 Difference]: Finished difference Result 548 states and 1124 transitions. [2021-08-21 18:34:03,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:34:03,357 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:34:03,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:03,359 INFO L225 Difference]: With dead ends: 548 [2021-08-21 18:34:03,359 INFO L226 Difference]: Without dead ends: 543 [2021-08-21 18:34:03,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1641.9ms TimeCoverageRelationStatistics Valid=253, Invalid=1153, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:34:03,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-08-21 18:34:03,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 353. [2021-08-21 18:34:03,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.1875) internal successors, (770), 352 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:03,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 770 transitions. [2021-08-21 18:34:03,371 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 770 transitions. Word has length 26 [2021-08-21 18:34:03,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:03,371 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 770 transitions. [2021-08-21 18:34:03,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:03,372 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 770 transitions. [2021-08-21 18:34:03,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:34:03,372 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:03,372 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] [2021-08-21 18:34:03,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 18:34:03,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 18:34:03,589 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:03,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:03,589 INFO L82 PathProgramCache]: Analyzing trace with hash -2052596322, now seen corresponding path program 12 times [2021-08-21 18:34:03,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:03,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73953528] [2021-08-21 18:34:03,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:03,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:03,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:03,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73953528] [2021-08-21 18:34:03,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73953528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:03,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786662046] [2021-08-21 18:34:03,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:34:03,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:03,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:03,941 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:34:03,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 18:34:05,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:34:05,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:05,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:34:05,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:05,992 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:34:05,992 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 93 treesize of output 77 [2021-08-21 18:34:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:06,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786662046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:06,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:06,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:34:06,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450386809] [2021-08-21 18:34:06,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:34:06,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:06,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:34:06,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:34:06,960 INFO L87 Difference]: Start difference. First operand 353 states and 770 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:07,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:07,601 INFO L93 Difference]: Finished difference Result 487 states and 1021 transitions. [2021-08-21 18:34:07,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:34:07,602 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-21 18:34:07,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:07,603 INFO L225 Difference]: With dead ends: 487 [2021-08-21 18:34:07,603 INFO L226 Difference]: Without dead ends: 482 [2021-08-21 18:34:07,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 761.9ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:34:07,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-08-21 18:34:07,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 356. [2021-08-21 18:34:07,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.1971830985915495) internal successors, (780), 355 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:07,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 780 transitions. [2021-08-21 18:34:07,611 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 780 transitions. Word has length 26 [2021-08-21 18:34:07,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:07,611 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 780 transitions. [2021-08-21 18:34:07,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:07,611 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 780 transitions. [2021-08-21 18:34:07,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:34:07,612 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:07,612 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] [2021-08-21 18:34:07,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-21 18:34:07,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 18:34:07,817 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:07,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:07,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1125002074, now seen corresponding path program 13 times [2021-08-21 18:34:07,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:07,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626040961] [2021-08-21 18:34:07,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:07,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:08,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:08,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:08,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626040961] [2021-08-21 18:34:08,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626040961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:08,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523867361] [2021-08-21 18:34:08,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:34:08,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:08,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:08,157 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:34:08,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 18:34:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:09,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 18:34:09,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:10,327 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:34:10,327 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 93 treesize of output 77 [2021-08-21 18:34:11,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:11,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523867361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:11,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:11,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:34:11,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692283845] [2021-08-21 18:34:11,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:34:11,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:11,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:34:11,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:34:11,449 INFO L87 Difference]: Start difference. First operand 356 states and 780 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:12,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:12,084 INFO L93 Difference]: Finished difference Result 476 states and 1001 transitions. [2021-08-21 18:34:12,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:34:12,084 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-21 18:34:12,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:12,086 INFO L225 Difference]: With dead ends: 476 [2021-08-21 18:34:12,086 INFO L226 Difference]: Without dead ends: 471 [2021-08-21 18:34:12,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 815.1ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:34:12,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-08-21 18:34:12,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 358. [2021-08-21 18:34:12,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.196078431372549) internal successors, (784), 357 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:12,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 784 transitions. [2021-08-21 18:34:12,091 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 784 transitions. Word has length 26 [2021-08-21 18:34:12,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:12,091 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 784 transitions. [2021-08-21 18:34:12,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:12,091 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 784 transitions. [2021-08-21 18:34:12,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:34:12,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:12,092 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] [2021-08-21 18:34:12,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 18:34:12,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:12,305 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:12,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:12,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1758141146, now seen corresponding path program 14 times [2021-08-21 18:34:12,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:12,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987626752] [2021-08-21 18:34:12,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:12,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:12,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:12,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987626752] [2021-08-21 18:34:12,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987626752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:12,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231726107] [2021-08-21 18:34:12,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:34:12,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:12,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:12,768 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:34:12,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 18:34:14,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:34:14,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:14,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:34:14,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:15,467 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 18:34:15,467 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 118 treesize of output 100 [2021-08-21 18:34:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:19,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231726107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:19,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:19,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 18:34:19,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082236059] [2021-08-21 18:34:19,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:34:19,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:19,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:34:19,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:34:19,165 INFO L87 Difference]: Start difference. First operand 358 states and 784 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:21,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:21,836 INFO L93 Difference]: Finished difference Result 567 states and 1147 transitions. [2021-08-21 18:34:21,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:34:21,836 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:34:21,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:21,838 INFO L225 Difference]: With dead ends: 567 [2021-08-21 18:34:21,838 INFO L226 Difference]: Without dead ends: 557 [2021-08-21 18:34:21,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 2750.8ms TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:34:21,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-08-21 18:34:21,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 365. [2021-08-21 18:34:21,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.217032967032967) internal successors, (807), 364 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:21,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 807 transitions. [2021-08-21 18:34:21,844 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 807 transitions. Word has length 26 [2021-08-21 18:34:21,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:21,844 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 807 transitions. [2021-08-21 18:34:21,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:21,844 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 807 transitions. [2021-08-21 18:34:21,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:34:21,845 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:21,845 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] [2021-08-21 18:34:21,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 18:34:22,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:22,067 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:22,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:22,068 INFO L82 PathProgramCache]: Analyzing trace with hash -429256102, now seen corresponding path program 15 times [2021-08-21 18:34:22,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:22,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553617589] [2021-08-21 18:34:22,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:22,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:22,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:22,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553617589] [2021-08-21 18:34:22,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553617589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:22,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563714879] [2021-08-21 18:34:22,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:34:22,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:22,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:22,577 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:34:22,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 18:34:24,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:34:24,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:24,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:34:24,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:25,566 INFO L354 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2021-08-21 18:34:25,567 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 118 treesize of output 103 [2021-08-21 18:34:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:26,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563714879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:26,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:26,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-21 18:34:26,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324325383] [2021-08-21 18:34:26,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:34:26,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:26,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:34:26,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:34:26,317 INFO L87 Difference]: Start difference. First operand 365 states and 807 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-08-21 18:34:29,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:29,018 INFO L93 Difference]: Finished difference Result 454 states and 928 transitions. [2021-08-21 18:34:29,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:34:29,023 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) 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 26 [2021-08-21 18:34:29,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:29,024 INFO L225 Difference]: With dead ends: 454 [2021-08-21 18:34:29,024 INFO L226 Difference]: Without dead ends: 444 [2021-08-21 18:34:29,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 2809.7ms TimeCoverageRelationStatistics Valid=414, Invalid=2342, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 18:34:29,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-08-21 18:34:29,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 365. [2021-08-21 18:34:29,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.217032967032967) internal successors, (807), 364 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:29,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 807 transitions. [2021-08-21 18:34:29,030 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 807 transitions. Word has length 26 [2021-08-21 18:34:29,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:29,030 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 807 transitions. [2021-08-21 18:34:29,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-08-21 18:34:29,030 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 807 transitions. [2021-08-21 18:34:29,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:34:29,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:29,031 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] [2021-08-21 18:34:29,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 18:34:29,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:29,245 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:29,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:29,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1920751014, now seen corresponding path program 16 times [2021-08-21 18:34:29,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:29,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412819389] [2021-08-21 18:34:29,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:29,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:29,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:29,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:29,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412819389] [2021-08-21 18:34:29,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412819389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:29,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820975689] [2021-08-21 18:34:29,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:34:29,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:29,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:29,661 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:34:29,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 18:34:31,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:34:31,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:31,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:34:31,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:32,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:34:32,382 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-21 18:34:32,382 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 130 treesize of output 84 [2021-08-21 18:34:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:32,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820975689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:32,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:32,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-21 18:34:32,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090610716] [2021-08-21 18:34:32,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:34:32,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:32,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:34:32,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:34:32,594 INFO L87 Difference]: Start difference. First operand 365 states and 807 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:34,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:34,394 INFO L93 Difference]: Finished difference Result 641 states and 1289 transitions. [2021-08-21 18:34:34,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:34:34,395 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:34:34,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:34,397 INFO L225 Difference]: With dead ends: 641 [2021-08-21 18:34:34,397 INFO L226 Difference]: Without dead ends: 626 [2021-08-21 18:34:34,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 1867.6ms TimeCoverageRelationStatistics Valid=465, Invalid=2397, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 18:34:34,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-08-21 18:34:34,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 397. [2021-08-21 18:34:34,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.2373737373737375) internal successors, (886), 396 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:34,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 886 transitions. [2021-08-21 18:34:34,403 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 886 transitions. Word has length 26 [2021-08-21 18:34:34,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:34,403 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 886 transitions. [2021-08-21 18:34:34,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:34,403 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 886 transitions. [2021-08-21 18:34:34,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:34:34,404 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:34,404 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] [2021-08-21 18:34:34,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 18:34:34,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-21 18:34:34,621 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:34,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:34,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2001640870, now seen corresponding path program 17 times [2021-08-21 18:34:34,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:34,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619957724] [2021-08-21 18:34:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:34,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:35,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:35,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:35,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619957724] [2021-08-21 18:34:35,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619957724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:35,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307209056] [2021-08-21 18:34:35,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:34:35,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:35,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:35,040 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:34:35,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 18:34:37,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:34:37,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:37,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:34:37,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:37,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:34:37,586 INFO L354 Elim1Store]: treesize reduction 20, result has 60.8 percent of original size [2021-08-21 18:34:37,587 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 128 treesize of output 106 [2021-08-21 18:34:38,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:38,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307209056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:38,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:38,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-21 18:34:38,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12100355] [2021-08-21 18:34:38,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:34:38,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:38,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:34:38,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:34:38,427 INFO L87 Difference]: Start difference. First operand 397 states and 886 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:41,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:41,358 INFO L93 Difference]: Finished difference Result 703 states and 1451 transitions. [2021-08-21 18:34:41,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 18:34:41,359 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:34:41,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:41,361 INFO L225 Difference]: With dead ends: 703 [2021-08-21 18:34:41,361 INFO L226 Difference]: Without dead ends: 687 [2021-08-21 18:34:41,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 2886.8ms TimeCoverageRelationStatistics Valid=611, Invalid=2469, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:34:41,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-08-21 18:34:41,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 407. [2021-08-21 18:34:41,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.2413793103448274) internal successors, (910), 406 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:41,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 910 transitions. [2021-08-21 18:34:41,368 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 910 transitions. Word has length 26 [2021-08-21 18:34:41,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:41,368 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 910 transitions. [2021-08-21 18:34:41,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:41,368 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 910 transitions. [2021-08-21 18:34:41,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:34:41,369 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:41,369 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] [2021-08-21 18:34:41,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 18:34:41,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:41,573 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:41,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:41,573 INFO L82 PathProgramCache]: Analyzing trace with hash 836353438, now seen corresponding path program 15 times [2021-08-21 18:34:41,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:41,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243873147] [2021-08-21 18:34:41,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:41,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:41,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:41,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243873147] [2021-08-21 18:34:41,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243873147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:41,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80259228] [2021-08-21 18:34:41,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:34:41,907 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:41,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:41,907 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:34:41,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 18:34:44,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:34:44,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:44,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:34:44,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:44,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:34:44,579 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 103 treesize of output 103 [2021-08-21 18:34:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:51,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80259228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:51,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:51,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-21 18:34:51,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286429858] [2021-08-21 18:34:51,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:34:51,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:51,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:34:51,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:34:51,504 INFO L87 Difference]: Start difference. First operand 407 states and 910 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:54,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:54,144 INFO L93 Difference]: Finished difference Result 600 states and 1248 transitions. [2021-08-21 18:34:54,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:34:54,144 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:34:54,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:54,146 INFO L225 Difference]: With dead ends: 600 [2021-08-21 18:34:54,146 INFO L226 Difference]: Without dead ends: 590 [2021-08-21 18:34:54,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 2723.4ms TimeCoverageRelationStatistics Valid=272, Invalid=1288, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:34:54,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-08-21 18:34:54,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 403. [2021-08-21 18:34:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.2388059701492535) internal successors, (900), 402 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 900 transitions. [2021-08-21 18:34:54,152 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 900 transitions. Word has length 26 [2021-08-21 18:34:54,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:54,152 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 900 transitions. [2021-08-21 18:34:54,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:54,152 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 900 transitions. [2021-08-21 18:34:54,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:34:54,153 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:54,153 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] [2021-08-21 18:34:54,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 18:34:54,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:54,361 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:54,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:54,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1935474206, now seen corresponding path program 18 times [2021-08-21 18:34:54,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:54,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516342340] [2021-08-21 18:34:54,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:54,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:55,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:55,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516342340] [2021-08-21 18:34:55,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516342340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:55,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104852330] [2021-08-21 18:34:55,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:34:55,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:55,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:55,086 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:34:55,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 18:34:57,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:34:57,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:57,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:34:57,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:57,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:34:57,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:34:57,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:34:57,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:34:57,950 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 122 treesize of output 100 [2021-08-21 18:34:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:58,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104852330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:58,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:58,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-08-21 18:34:58,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987497804] [2021-08-21 18:34:58,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:34:58,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:58,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:34:58,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:34:58,858 INFO L87 Difference]: Start difference. First operand 403 states and 900 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:04,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:04,364 INFO L93 Difference]: Finished difference Result 605 states and 1294 transitions. [2021-08-21 18:35:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 18:35:04,365 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:04,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:04,366 INFO L225 Difference]: With dead ends: 605 [2021-08-21 18:35:04,366 INFO L226 Difference]: Without dead ends: 595 [2021-08-21 18:35:04,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 5432.8ms TimeCoverageRelationStatistics Valid=943, Invalid=3749, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 18:35:04,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-08-21 18:35:04,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 419. [2021-08-21 18:35:04,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.2464114832535884) internal successors, (939), 418 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:04,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 939 transitions. [2021-08-21 18:35:04,373 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 939 transitions. Word has length 26 [2021-08-21 18:35:04,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:04,373 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 939 transitions. [2021-08-21 18:35:04,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:04,373 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 939 transitions. [2021-08-21 18:35:04,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:04,374 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:04,374 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] [2021-08-21 18:35:04,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:04,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 18:35:04,584 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:04,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:04,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1975466006, now seen corresponding path program 16 times [2021-08-21 18:35:04,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:04,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615860127] [2021-08-21 18:35:04,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:04,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:05,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:05,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615860127] [2021-08-21 18:35:05,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615860127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:05,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346656176] [2021-08-21 18:35:05,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:35:05,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:05,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:05,048 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:05,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 18:35:07,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:35:07,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:07,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 18:35:07,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:08,018 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:35:08,019 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 112 treesize of output 86 [2021-08-21 18:35:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:08,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346656176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:08,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:08,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:35:08,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556320978] [2021-08-21 18:35:08,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:35:08,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:08,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:35:08,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:35:08,953 INFO L87 Difference]: Start difference. First operand 419 states and 939 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:10,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:10,555 INFO L93 Difference]: Finished difference Result 601 states and 1260 transitions. [2021-08-21 18:35:10,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:35:10,556 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-21 18:35:10,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:10,557 INFO L225 Difference]: With dead ends: 601 [2021-08-21 18:35:10,558 INFO L226 Difference]: Without dead ends: 596 [2021-08-21 18:35:10,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1706.3ms TimeCoverageRelationStatistics Valid=276, Invalid=984, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:35:10,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-08-21 18:35:10,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 417. [2021-08-21 18:35:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.2403846153846154) internal successors, (932), 416 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:10,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 932 transitions. [2021-08-21 18:35:10,563 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 932 transitions. Word has length 26 [2021-08-21 18:35:10,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:10,564 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 932 transitions. [2021-08-21 18:35:10,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:10,564 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 932 transitions. [2021-08-21 18:35:10,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:10,564 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:10,564 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] [2021-08-21 18:35:10,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-21 18:35:10,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 18:35:10,779 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:10,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:10,780 INFO L82 PathProgramCache]: Analyzing trace with hash 291662298, now seen corresponding path program 17 times [2021-08-21 18:35:10,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:10,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459104347] [2021-08-21 18:35:10,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:10,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:11,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:11,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459104347] [2021-08-21 18:35:11,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459104347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:11,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652704456] [2021-08-21 18:35:11,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:35:11,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:11,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:11,203 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:11,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 18:35:13,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:35:13,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:13,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:35:13,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:14,514 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:35:14,514 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 110 treesize of output 79 [2021-08-21 18:35:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:14,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652704456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:14,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:14,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 18:35:14,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129359108] [2021-08-21 18:35:14,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:35:14,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:14,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:35:14,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:35:14,900 INFO L87 Difference]: Start difference. First operand 417 states and 932 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:15,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:15,721 INFO L93 Difference]: Finished difference Result 585 states and 1243 transitions. [2021-08-21 18:35:15,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:35:15,721 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:15,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:15,723 INFO L225 Difference]: With dead ends: 585 [2021-08-21 18:35:15,723 INFO L226 Difference]: Without dead ends: 580 [2021-08-21 18:35:15,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 993.5ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:35:15,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-08-21 18:35:15,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 429. [2021-08-21 18:35:15,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.2429906542056073) internal successors, (960), 428 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) [2021-08-21 18:35:15,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 960 transitions. [2021-08-21 18:35:15,730 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 960 transitions. Word has length 26 [2021-08-21 18:35:15,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:15,730 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 960 transitions. [2021-08-21 18:35:15,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:15,730 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 960 transitions. [2021-08-21 18:35:15,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:15,731 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:15,731 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] [2021-08-21 18:35:15,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:15,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 18:35:15,953 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:15,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:15,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1280722470, now seen corresponding path program 18 times [2021-08-21 18:35:15,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:15,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586410084] [2021-08-21 18:35:15,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:15,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:16,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:16,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586410084] [2021-08-21 18:35:16,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586410084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:16,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147987099] [2021-08-21 18:35:16,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:35:16,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:16,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:16,301 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:16,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 18:35:18,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:35:18,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:18,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:35:18,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:19,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:35:19,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:35:19,480 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 104 treesize of output 78 [2021-08-21 18:35:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:20,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147987099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:20,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:20,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 18:35:20,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972607682] [2021-08-21 18:35:20,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:35:20,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:20,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:35:20,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:35:20,567 INFO L87 Difference]: Start difference. First operand 429 states and 960 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:21,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:21,691 INFO L93 Difference]: Finished difference Result 627 states and 1315 transitions. [2021-08-21 18:35:21,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:35:21,692 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:21,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:21,694 INFO L225 Difference]: With dead ends: 627 [2021-08-21 18:35:21,694 INFO L226 Difference]: Without dead ends: 622 [2021-08-21 18:35:21,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1272.5ms TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:35:21,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-08-21 18:35:21,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 431. [2021-08-21 18:35:21,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.2488372093023257) internal successors, (967), 430 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:21,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 967 transitions. [2021-08-21 18:35:21,705 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 967 transitions. Word has length 26 [2021-08-21 18:35:21,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:21,705 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 967 transitions. [2021-08-21 18:35:21,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:21,705 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 967 transitions. [2021-08-21 18:35:21,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:21,706 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:21,706 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] [2021-08-21 18:35:21,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:21,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 18:35:21,927 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:21,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:21,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1454412646, now seen corresponding path program 19 times [2021-08-21 18:35:21,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:21,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365451540] [2021-08-21 18:35:21,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:21,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:22,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:22,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365451540] [2021-08-21 18:35:22,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365451540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:22,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732618911] [2021-08-21 18:35:22,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:35:22,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:22,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:22,284 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:22,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 18:35:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:24,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:35:24,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:25,484 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:35:25,484 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 93 treesize of output 77 [2021-08-21 18:35:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:26,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732618911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:26,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:26,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 18:35:26,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488036243] [2021-08-21 18:35:26,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:35:26,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:26,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:35:26,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:35:26,444 INFO L87 Difference]: Start difference. First operand 431 states and 967 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:26,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:26,999 INFO L93 Difference]: Finished difference Result 589 states and 1260 transitions. [2021-08-21 18:35:26,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:35:26,999 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 26 [2021-08-21 18:35:26,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:27,001 INFO L225 Difference]: With dead ends: 589 [2021-08-21 18:35:27,001 INFO L226 Difference]: Without dead ends: 584 [2021-08-21 18:35:27,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 692.7ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:35:27,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-08-21 18:35:27,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 431. [2021-08-21 18:35:27,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.2488372093023257) internal successors, (967), 430 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:27,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 967 transitions. [2021-08-21 18:35:27,007 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 967 transitions. Word has length 26 [2021-08-21 18:35:27,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:27,007 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 967 transitions. [2021-08-21 18:35:27,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:27,007 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 967 transitions. [2021-08-21 18:35:27,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:27,007 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:27,008 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] [2021-08-21 18:35:27,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-21 18:35:27,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 18:35:27,208 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:27,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:27,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2046217062, now seen corresponding path program 20 times [2021-08-21 18:35:27,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:27,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290976967] [2021-08-21 18:35:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:27,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:27,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:27,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290976967] [2021-08-21 18:35:27,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290976967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:27,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532139104] [2021-08-21 18:35:27,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:35:27,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:27,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:27,507 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:27,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 18:35:30,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:35:30,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:30,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:35:30,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:30,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:35:30,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:35:30,846 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 85 treesize of output 69 [2021-08-21 18:35:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:31,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532139104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:31,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:31,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 18:35:31,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773642031] [2021-08-21 18:35:31,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:35:31,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:31,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:35:31,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:35:31,799 INFO L87 Difference]: Start difference. First operand 431 states and 967 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:32,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:32,514 INFO L93 Difference]: Finished difference Result 591 states and 1264 transitions. [2021-08-21 18:35:32,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:35:32,515 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:32,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:32,516 INFO L225 Difference]: With dead ends: 591 [2021-08-21 18:35:32,517 INFO L226 Difference]: Without dead ends: 586 [2021-08-21 18:35:32,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 865.2ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:35:32,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-08-21 18:35:32,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 435. [2021-08-21 18:35:32,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.2465437788018434) internal successors, (975), 434 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:32,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 975 transitions. [2021-08-21 18:35:32,523 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 975 transitions. Word has length 26 [2021-08-21 18:35:32,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:32,523 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 975 transitions. [2021-08-21 18:35:32,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:32,523 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 975 transitions. [2021-08-21 18:35:32,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:32,523 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:32,523 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] [2021-08-21 18:35:32,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:32,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-21 18:35:32,732 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:32,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:32,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2095905962, now seen corresponding path program 21 times [2021-08-21 18:35:32,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:32,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161244889] [2021-08-21 18:35:32,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:32,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:33,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:33,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:33,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161244889] [2021-08-21 18:35:33,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161244889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:33,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560501998] [2021-08-21 18:35:33,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:35:33,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:33,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:33,113 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:33,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 18:35:36,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:35:36,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:36,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:35:36,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:36,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:35:36,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:35:36,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:35:36,517 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 115 treesize of output 87 [2021-08-21 18:35:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:37,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560501998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:37,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:37,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 18:35:37,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227562228] [2021-08-21 18:35:37,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:35:37,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:37,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:35:37,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:35:37,541 INFO L87 Difference]: Start difference. First operand 435 states and 975 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:38,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:38,485 INFO L93 Difference]: Finished difference Result 601 states and 1278 transitions. [2021-08-21 18:35:38,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:35:38,485 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:38,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:38,487 INFO L225 Difference]: With dead ends: 601 [2021-08-21 18:35:38,487 INFO L226 Difference]: Without dead ends: 591 [2021-08-21 18:35:38,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1126.1ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:35:38,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-08-21 18:35:38,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 446. [2021-08-21 18:35:38,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 2.247191011235955) internal successors, (1000), 445 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:38,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1000 transitions. [2021-08-21 18:35:38,493 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1000 transitions. Word has length 26 [2021-08-21 18:35:38,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:38,493 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 1000 transitions. [2021-08-21 18:35:38,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:38,493 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1000 transitions. [2021-08-21 18:35:38,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:38,494 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:38,494 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] [2021-08-21 18:35:38,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:38,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 18:35:38,697 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:38,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:38,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1598426410, now seen corresponding path program 22 times [2021-08-21 18:35:38,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:38,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858753056] [2021-08-21 18:35:38,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:38,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:38,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:39,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:39,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858753056] [2021-08-21 18:35:39,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858753056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:39,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202957423] [2021-08-21 18:35:39,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:35:39,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:39,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:39,206 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:39,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 18:35:42,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:35:42,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:42,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 18:35:42,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:42,923 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:35:42,924 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 110 treesize of output 79 [2021-08-21 18:35:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:43,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202957423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:43,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:43,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:35:43,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079914832] [2021-08-21 18:35:43,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:35:43,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:43,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:35:43,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:35:43,403 INFO L87 Difference]: Start difference. First operand 446 states and 1000 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:44,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:44,299 INFO L93 Difference]: Finished difference Result 609 states and 1291 transitions. [2021-08-21 18:35:44,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:35:44,299 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-21 18:35:44,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:44,301 INFO L225 Difference]: With dead ends: 609 [2021-08-21 18:35:44,301 INFO L226 Difference]: Without dead ends: 599 [2021-08-21 18:35:44,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 991.5ms TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:35:44,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-08-21 18:35:44,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 452. [2021-08-21 18:35:44,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 2.2527716186252773) internal successors, (1016), 451 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:44,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1016 transitions. [2021-08-21 18:35:44,307 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1016 transitions. Word has length 26 [2021-08-21 18:35:44,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:44,307 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 1016 transitions. [2021-08-21 18:35:44,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:44,307 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1016 transitions. [2021-08-21 18:35:44,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:44,308 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:44,308 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] [2021-08-21 18:35:44,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-21 18:35:44,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-21 18:35:44,518 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:44,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:44,519 INFO L82 PathProgramCache]: Analyzing trace with hash 509143638, now seen corresponding path program 19 times [2021-08-21 18:35:44,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:44,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656706829] [2021-08-21 18:35:44,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:44,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:44,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:44,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656706829] [2021-08-21 18:35:44,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656706829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:44,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499926637] [2021-08-21 18:35:44,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:35:44,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:44,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:44,918 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:44,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 18:35:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:47,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:35:47,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:48,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:35:48,832 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-21 18:35:48,832 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 130 treesize of output 84 [2021-08-21 18:35:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:49,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499926637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:49,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:49,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 18:35:49,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396588826] [2021-08-21 18:35:49,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:35:49,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:49,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:35:49,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:35:49,001 INFO L87 Difference]: Start difference. First operand 452 states and 1016 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:49,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:49,845 INFO L93 Difference]: Finished difference Result 599 states and 1247 transitions. [2021-08-21 18:35:49,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:35:49,845 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 26 [2021-08-21 18:35:49,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:49,847 INFO L225 Difference]: With dead ends: 599 [2021-08-21 18:35:49,847 INFO L226 Difference]: Without dead ends: 589 [2021-08-21 18:35:49,847 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 990.1ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:35:49,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-08-21 18:35:49,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 460. [2021-08-21 18:35:49,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 2.2570806100217866) internal successors, (1036), 459 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:49,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1036 transitions. [2021-08-21 18:35:49,853 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1036 transitions. Word has length 26 [2021-08-21 18:35:49,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:49,853 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1036 transitions. [2021-08-21 18:35:49,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:49,853 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1036 transitions. [2021-08-21 18:35:49,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:49,854 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:49,854 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] [2021-08-21 18:35:49,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:50,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:50,061 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:50,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:50,061 INFO L82 PathProgramCache]: Analyzing trace with hash -405959978, now seen corresponding path program 23 times [2021-08-21 18:35:50,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:50,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771543482] [2021-08-21 18:35:50,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:50,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:50,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:50,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771543482] [2021-08-21 18:35:50,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771543482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:50,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350809837] [2021-08-21 18:35:50,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:35:50,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:50,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:50,485 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:50,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 18:35:53,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:35:53,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:53,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:35:53,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:54,289 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:35:54,290 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 112 treesize of output 86 [2021-08-21 18:35:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:55,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350809837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:55,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:55,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 18:35:55,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084724851] [2021-08-21 18:35:55,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:35:55,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:55,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:35:55,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:35:55,383 INFO L87 Difference]: Start difference. First operand 460 states and 1036 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:56,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:56,963 INFO L93 Difference]: Finished difference Result 637 states and 1343 transitions. [2021-08-21 18:35:56,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:35:56,963 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:56,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:56,965 INFO L225 Difference]: With dead ends: 637 [2021-08-21 18:35:56,965 INFO L226 Difference]: Without dead ends: 632 [2021-08-21 18:35:56,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1623.5ms TimeCoverageRelationStatistics Valid=273, Invalid=987, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:35:56,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-08-21 18:35:56,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 460. [2021-08-21 18:35:56,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 2.2570806100217866) internal successors, (1036), 459 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:56,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1036 transitions. [2021-08-21 18:35:56,971 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1036 transitions. Word has length 26 [2021-08-21 18:35:56,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:56,971 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1036 transitions. [2021-08-21 18:35:56,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:56,971 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1036 transitions. [2021-08-21 18:35:56,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:56,972 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:56,972 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] [2021-08-21 18:35:56,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:57,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:57,176 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:57,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:57,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1063241130, now seen corresponding path program 20 times [2021-08-21 18:35:57,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:57,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963201506] [2021-08-21 18:35:57,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:57,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:57,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:57,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963201506] [2021-08-21 18:35:57,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963201506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:57,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879782432] [2021-08-21 18:35:57,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:35:57,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:57,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:57,450 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:57,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 18:36:00,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:36:00,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:00,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:36:00,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:01,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:36:01,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:36:01,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:36:01,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:36:01,269 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 122 treesize of output 100 [2021-08-21 18:36:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:02,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879782432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:02,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:02,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 18:36:02,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698284573] [2021-08-21 18:36:02,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:36:02,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:02,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:36:02,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:36:02,075 INFO L87 Difference]: Start difference. First operand 460 states and 1036 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:04,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:04,857 INFO L93 Difference]: Finished difference Result 825 states and 1689 transitions. [2021-08-21 18:36:04,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:36:04,857 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 26 [2021-08-21 18:36:04,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:04,860 INFO L225 Difference]: With dead ends: 825 [2021-08-21 18:36:04,860 INFO L226 Difference]: Without dead ends: 809 [2021-08-21 18:36:04,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 2661.1ms TimeCoverageRelationStatistics Valid=457, Invalid=1705, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:36:04,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2021-08-21 18:36:04,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 481. [2021-08-21 18:36:04,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 2.2416666666666667) internal successors, (1076), 480 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:04,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1076 transitions. [2021-08-21 18:36:04,867 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1076 transitions. Word has length 26 [2021-08-21 18:36:04,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:04,867 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1076 transitions. [2021-08-21 18:36:04,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:04,867 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1076 transitions. [2021-08-21 18:36:04,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:36:04,868 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:04,868 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] [2021-08-21 18:36:04,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 18:36:05,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 18:36:05,068 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:05,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:05,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1774753178, now seen corresponding path program 24 times [2021-08-21 18:36:05,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:05,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468825803] [2021-08-21 18:36:05,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:05,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:05,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:05,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468825803] [2021-08-21 18:36:05,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468825803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:05,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426546857] [2021-08-21 18:36:05,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:36:05,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:05,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:05,472 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:36:05,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 18:36:08,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:36:08,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:08,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:36:08,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:09,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:36:09,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:36:09,262 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 85 treesize of output 69 [2021-08-21 18:36:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:10,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426546857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:10,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:10,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 18:36:10,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255212930] [2021-08-21 18:36:10,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:36:10,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:10,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:36:10,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:36:10,238 INFO L87 Difference]: Start difference. First operand 481 states and 1076 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:11,749 INFO L93 Difference]: Finished difference Result 672 states and 1424 transitions. [2021-08-21 18:36:11,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:36:11,749 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:36:11,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:11,751 INFO L225 Difference]: With dead ends: 672 [2021-08-21 18:36:11,751 INFO L226 Difference]: Without dead ends: 667 [2021-08-21 18:36:11,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1538.4ms TimeCoverageRelationStatistics Valid=256, Invalid=1150, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:36:11,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-08-21 18:36:11,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 481. [2021-08-21 18:36:11,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 2.2416666666666667) internal successors, (1076), 480 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:11,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1076 transitions. [2021-08-21 18:36:11,757 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1076 transitions. Word has length 26 [2021-08-21 18:36:11,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:11,757 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1076 transitions. [2021-08-21 18:36:11,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:11,757 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1076 transitions. [2021-08-21 18:36:11,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:36:11,758 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:11,758 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] [2021-08-21 18:36:11,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 18:36:11,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 18:36:11,959 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:11,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:11,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1421093350, now seen corresponding path program 21 times [2021-08-21 18:36:11,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:11,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030228211] [2021-08-21 18:36:11,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:11,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:12,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:12,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030228211] [2021-08-21 18:36:12,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030228211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:12,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194466749] [2021-08-21 18:36:12,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:36:12,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:12,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:12,292 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:36:12,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 18:36:15,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:36:15,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:15,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:36:15,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:16,425 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-21 18:36:16,425 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 120 treesize of output 118 [2021-08-21 18:36:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:19,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194466749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:19,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:19,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-21 18:36:19,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20273712] [2021-08-21 18:36:19,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:36:19,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:19,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:36:19,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:36:19,024 INFO L87 Difference]: Start difference. First operand 481 states and 1076 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:21,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:21,102 INFO L93 Difference]: Finished difference Result 726 states and 1542 transitions. [2021-08-21 18:36:21,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:36:21,103 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:36:21,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:21,104 INFO L225 Difference]: With dead ends: 726 [2021-08-21 18:36:21,104 INFO L226 Difference]: Without dead ends: 716 [2021-08-21 18:36:21,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 2185.5ms TimeCoverageRelationStatistics Valid=469, Invalid=1787, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:36:21,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-08-21 18:36:21,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 500. [2021-08-21 18:36:21,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.244488977955912) internal successors, (1120), 499 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:21,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1120 transitions. [2021-08-21 18:36:21,111 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1120 transitions. Word has length 26 [2021-08-21 18:36:21,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:21,111 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 1120 transitions. [2021-08-21 18:36:21,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:21,111 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1120 transitions. [2021-08-21 18:36:21,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:36:21,112 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:21,112 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] [2021-08-21 18:36:21,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 18:36:21,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-21 18:36:21,321 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:21,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:21,321 INFO L82 PathProgramCache]: Analyzing trace with hash -314370918, now seen corresponding path program 25 times [2021-08-21 18:36:21,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:21,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631729286] [2021-08-21 18:36:21,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:21,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:21,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:21,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631729286] [2021-08-21 18:36:21,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631729286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:21,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215544441] [2021-08-21 18:36:21,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:36:21,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:21,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:21,716 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:36:21,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 18:36:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:25,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 18:36:25,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:25,749 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:36:25,749 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 93 treesize of output 77 [2021-08-21 18:36:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:26,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215544441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:26,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:26,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:36:26,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206777046] [2021-08-21 18:36:26,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:36:26,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:26,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:36:26,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:36:26,842 INFO L87 Difference]: Start difference. First operand 500 states and 1120 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:27,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:27,600 INFO L93 Difference]: Finished difference Result 679 states and 1450 transitions. [2021-08-21 18:36:27,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:36:27,601 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-21 18:36:27,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:27,602 INFO L225 Difference]: With dead ends: 679 [2021-08-21 18:36:27,602 INFO L226 Difference]: Without dead ends: 674 [2021-08-21 18:36:27,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 834.3ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:36:27,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-08-21 18:36:27,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 502. [2021-08-21 18:36:27,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.24750499001996) internal successors, (1126), 501 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:27,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1126 transitions. [2021-08-21 18:36:27,608 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1126 transitions. Word has length 26 [2021-08-21 18:36:27,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:27,609 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1126 transitions. [2021-08-21 18:36:27,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:27,609 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1126 transitions. [2021-08-21 18:36:27,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:36:27,609 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:27,609 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] [2021-08-21 18:36:27,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 18:36:27,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:27,810 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:27,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:27,810 INFO L82 PathProgramCache]: Analyzing trace with hash -621267686, now seen corresponding path program 22 times [2021-08-21 18:36:27,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:27,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779678662] [2021-08-21 18:36:27,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:27,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:28,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:28,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779678662] [2021-08-21 18:36:28,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779678662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:28,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778632230] [2021-08-21 18:36:28,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:36:28,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:28,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:28,240 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:36:28,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 18:36:31,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:36:31,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:31,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:36:31,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:32,574 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 18:36:32,574 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 120 treesize of output 100 [2021-08-21 18:36:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:33,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778632230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:33,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:33,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 18:36:33,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518326517] [2021-08-21 18:36:33,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:36:33,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:33,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:36:33,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:36:33,610 INFO L87 Difference]: Start difference. First operand 502 states and 1126 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:34,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:34,659 INFO L93 Difference]: Finished difference Result 714 states and 1519 transitions. [2021-08-21 18:36:34,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:36:34,659 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:36:34,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:34,660 INFO L225 Difference]: With dead ends: 714 [2021-08-21 18:36:34,660 INFO L226 Difference]: Without dead ends: 704 [2021-08-21 18:36:34,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1133.4ms TimeCoverageRelationStatistics Valid=282, Invalid=1124, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:36:34,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-08-21 18:36:34,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 503. [2021-08-21 18:36:34,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.239043824701195) internal successors, (1124), 502 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:34,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1124 transitions. [2021-08-21 18:36:34,667 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1124 transitions. Word has length 26 [2021-08-21 18:36:34,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:34,667 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1124 transitions. [2021-08-21 18:36:34,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:34,667 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1124 transitions. [2021-08-21 18:36:34,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:36:34,667 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:34,667 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] [2021-08-21 18:36:34,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 18:36:34,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 18:36:34,868 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:34,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:34,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1136752764, now seen corresponding path program 26 times [2021-08-21 18:36:34,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:34,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529873550] [2021-08-21 18:36:34,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:34,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:34,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:34,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529873550] [2021-08-21 18:36:34,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529873550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:34,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831575712] [2021-08-21 18:36:34,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:36:34,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:34,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:34,948 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:36:34,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 18:36:38,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:36:38,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:38,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:36:38,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:38,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831575712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:38,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:38,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 18:36:38,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081142160] [2021-08-21 18:36:38,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:36:38,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:38,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:36:38,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:36:38,808 INFO L87 Difference]: Start difference. First operand 503 states and 1124 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) [2021-08-21 18:36:39,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:39,384 INFO L93 Difference]: Finished difference Result 1073 states and 2163 transitions. [2021-08-21 18:36:39,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 18:36:39,385 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 [2021-08-21 18:36:39,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:39,387 INFO L225 Difference]: With dead ends: 1073 [2021-08-21 18:36:39,387 INFO L226 Difference]: Without dead ends: 1073 [2021-08-21 18:36:39,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 406.3ms TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:36:39,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-08-21 18:36:39,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 563. [2021-08-21 18:36:39,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.2704626334519573) internal successors, (1276), 562 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:39,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1276 transitions. [2021-08-21 18:36:39,397 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1276 transitions. Word has length 28 [2021-08-21 18:36:39,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:39,397 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 1276 transitions. [2021-08-21 18:36:39,397 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) [2021-08-21 18:36:39,397 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1276 transitions. [2021-08-21 18:36:39,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:36:39,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:39,398 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] [2021-08-21 18:36:39,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 18:36:39,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:39,601 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:39,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:39,601 INFO L82 PathProgramCache]: Analyzing trace with hash -354742148, now seen corresponding path program 27 times [2021-08-21 18:36:39,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:39,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273064316] [2021-08-21 18:36:39,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:39,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:39,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:39,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273064316] [2021-08-21 18:36:39,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273064316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:39,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4340878] [2021-08-21 18:36:39,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:36:39,680 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:39,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:39,680 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:36:39,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 18:36:43,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:36:43,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:43,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:36:43,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:43,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4340878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:43,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:43,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 18:36:43,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393075936] [2021-08-21 18:36:43,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:36:43,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:43,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:36:43,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:36:43,513 INFO L87 Difference]: Start difference. First operand 563 states and 1276 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) [2021-08-21 18:36:44,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:44,277 INFO L93 Difference]: Finished difference Result 1223 states and 2404 transitions. [2021-08-21 18:36:44,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 18:36:44,277 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 [2021-08-21 18:36:44,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:44,279 INFO L225 Difference]: With dead ends: 1223 [2021-08-21 18:36:44,279 INFO L226 Difference]: Without dead ends: 1223 [2021-08-21 18:36:44,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 550.4ms TimeCoverageRelationStatistics Valid=826, Invalid=3206, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 18:36:44,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-08-21 18:36:44,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 565. [2021-08-21 18:36:44,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 2.2588652482269502) internal successors, (1274), 564 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:44,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 1274 transitions. [2021-08-21 18:36:44,289 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 1274 transitions. Word has length 28 [2021-08-21 18:36:44,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:44,289 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 1274 transitions. [2021-08-21 18:36:44,289 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) [2021-08-21 18:36:44,289 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 1274 transitions. [2021-08-21 18:36:44,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:36:44,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:44,290 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] [2021-08-21 18:36:44,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-21 18:36:44,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-21 18:36:44,497 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:44,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:44,497 INFO L82 PathProgramCache]: Analyzing trace with hash -712994820, now seen corresponding path program 23 times [2021-08-21 18:36:44,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:44,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801810723] [2021-08-21 18:36:44,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:44,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:44,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:44,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801810723] [2021-08-21 18:36:44,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801810723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:44,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79802209] [2021-08-21 18:36:44,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:36:44,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:44,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:44,601 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:36:44,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 18:36:48,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:36:48,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:48,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:36:48,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:48,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79802209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:48,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:48,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-21 18:36:48,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767457909] [2021-08-21 18:36:48,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:36:48,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:48,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:36:48,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:36:48,476 INFO L87 Difference]: Start difference. First operand 565 states and 1274 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) [2021-08-21 18:36:48,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:48,833 INFO L93 Difference]: Finished difference Result 954 states and 1948 transitions. [2021-08-21 18:36:48,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:36:48,833 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 [2021-08-21 18:36:48,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:48,834 INFO L225 Difference]: With dead ends: 954 [2021-08-21 18:36:48,834 INFO L226 Difference]: Without dead ends: 954 [2021-08-21 18:36:48,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 283.1ms TimeCoverageRelationStatistics Valid=310, Invalid=1096, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:36:48,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-08-21 18:36:48,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 563. [2021-08-21 18:36:48,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.2562277580071175) internal successors, (1268), 562 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:48,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1268 transitions. [2021-08-21 18:36:48,842 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1268 transitions. Word has length 28 [2021-08-21 18:36:48,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:48,842 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 1268 transitions. [2021-08-21 18:36:48,842 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) [2021-08-21 18:36:48,842 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1268 transitions. [2021-08-21 18:36:48,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:36:48,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:48,843 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] [2021-08-21 18:36:48,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 18:36:49,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-21 18:36:49,044 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:49,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:49,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1576605688, now seen corresponding path program 28 times [2021-08-21 18:36:49,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:49,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604072458] [2021-08-21 18:36:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:49,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:36:49,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:49,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604072458] [2021-08-21 18:36:49,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604072458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:49,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330653213] [2021-08-21 18:36:49,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:36:49,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:49,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:49,105 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:36:49,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 18:36:52,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:36:52,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:52,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:36:52,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:36:52,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330653213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:52,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:52,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 18:36:52,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481977356] [2021-08-21 18:36:52,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:36:52,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:52,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:36:52,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:36:52,992 INFO L87 Difference]: Start difference. First operand 563 states and 1268 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) [2021-08-21 18:36:53,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:53,083 INFO L93 Difference]: Finished difference Result 888 states and 1884 transitions. [2021-08-21 18:36:53,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:36:53,083 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 [2021-08-21 18:36:53,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:53,084 INFO L225 Difference]: With dead ends: 888 [2021-08-21 18:36:53,084 INFO L226 Difference]: Without dead ends: 888 [2021-08-21 18:36:53,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:36:53,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-08-21 18:36:53,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 745. [2021-08-21 18:36:53,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.25) internal successors, (1674), 744 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:53,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1674 transitions. [2021-08-21 18:36:53,093 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1674 transitions. Word has length 28 [2021-08-21 18:36:53,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:53,093 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 1674 transitions. [2021-08-21 18:36:53,093 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) [2021-08-21 18:36:53,093 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1674 transitions. [2021-08-21 18:36:53,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:36:53,094 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:53,094 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] [2021-08-21 18:36:53,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 18:36:53,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:53,295 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:53,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:53,295 INFO L82 PathProgramCache]: Analyzing trace with hash -273141896, now seen corresponding path program 29 times [2021-08-21 18:36:53,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:53,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351748670] [2021-08-21 18:36:53,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:53,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:53,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:53,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351748670] [2021-08-21 18:36:53,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351748670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:53,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544651638] [2021-08-21 18:36:53,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:36:53,354 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:53,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:53,367 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:36:53,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 18:36:57,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:36:57,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:57,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:36:57,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:57,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544651638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:57,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:57,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 18:36:57,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417595981] [2021-08-21 18:36:57,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:36:57,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:57,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:36:57,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:36:57,204 INFO L87 Difference]: Start difference. First operand 745 states and 1674 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) [2021-08-21 18:36:57,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:57,507 INFO L93 Difference]: Finished difference Result 1076 states and 2195 transitions. [2021-08-21 18:36:57,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:36:57,507 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 [2021-08-21 18:36:57,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:57,509 INFO L225 Difference]: With dead ends: 1076 [2021-08-21 18:36:57,509 INFO L226 Difference]: Without dead ends: 1058 [2021-08-21 18:36:57,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 213.3ms TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:36:57,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-08-21 18:36:57,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 814. [2021-08-21 18:36:57,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 2.252152521525215) internal successors, (1831), 813 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:57,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1831 transitions. [2021-08-21 18:36:57,521 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1831 transitions. Word has length 28 [2021-08-21 18:36:57,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:57,521 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1831 transitions. [2021-08-21 18:36:57,521 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) [2021-08-21 18:36:57,521 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1831 transitions. [2021-08-21 18:36:57,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:36:57,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:57,522 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] [2021-08-21 18:36:57,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 18:36:57,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 18:36:57,737 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:57,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:57,737 INFO L82 PathProgramCache]: Analyzing trace with hash 235890424, now seen corresponding path program 24 times [2021-08-21 18:36:57,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:57,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990393613] [2021-08-21 18:36:57,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:57,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:57,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:57,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990393613] [2021-08-21 18:36:57,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990393613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:57,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927471067] [2021-08-21 18:36:57,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:36:57,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:57,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:57,799 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:36:57,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 18:37:01,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:37:01,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:01,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:37:01,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:01,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927471067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:01,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:01,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 18:37:01,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120279236] [2021-08-21 18:37:01,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:37:01,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:01,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:37:01,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:37:01,803 INFO L87 Difference]: Start difference. First operand 814 states and 1831 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) [2021-08-21 18:37:02,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:02,087 INFO L93 Difference]: Finished difference Result 1568 states and 3160 transitions. [2021-08-21 18:37:02,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:37:02,087 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 [2021-08-21 18:37:02,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:02,089 INFO L225 Difference]: With dead ends: 1568 [2021-08-21 18:37:02,090 INFO L226 Difference]: Without dead ends: 1542 [2021-08-21 18:37:02,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 255.5ms TimeCoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:37:02,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2021-08-21 18:37:02,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1040. [2021-08-21 18:37:02,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 2.271414821944177) internal successors, (2360), 1039 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:02,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 2360 transitions. [2021-08-21 18:37:02,103 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 2360 transitions. Word has length 28 [2021-08-21 18:37:02,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:02,103 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 2360 transitions. [2021-08-21 18:37:02,103 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) [2021-08-21 18:37:02,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 2360 transitions. [2021-08-21 18:37:02,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:37:02,104 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:02,105 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] [2021-08-21 18:37:02,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:02,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 18:37:02,305 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:02,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:02,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1289611128, now seen corresponding path program 30 times [2021-08-21 18:37:02,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:02,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752736198] [2021-08-21 18:37:02,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:02,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:02,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:02,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:02,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752736198] [2021-08-21 18:37:02,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752736198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:02,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040943552] [2021-08-21 18:37:02,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:37:02,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:02,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:02,362 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:37:02,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 18:37:06,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:37:06,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:06,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:37:06,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:06,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040943552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:06,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:06,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 18:37:06,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265069677] [2021-08-21 18:37:06,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:37:06,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:06,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:37:06,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:37:06,227 INFO L87 Difference]: Start difference. First operand 1040 states and 2360 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) [2021-08-21 18:37:06,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:06,592 INFO L93 Difference]: Finished difference Result 1468 states and 2957 transitions. [2021-08-21 18:37:06,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:37:06,592 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 [2021-08-21 18:37:06,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:06,594 INFO L225 Difference]: With dead ends: 1468 [2021-08-21 18:37:06,594 INFO L226 Difference]: Without dead ends: 1456 [2021-08-21 18:37:06,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 266.8ms TimeCoverageRelationStatistics Valid=334, Invalid=788, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:37:06,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-08-21 18:37:06,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1052. [2021-08-21 18:37:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 2.2778306374881065) internal successors, (2394), 1051 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:06,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 2394 transitions. [2021-08-21 18:37:06,610 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 2394 transitions. Word has length 28 [2021-08-21 18:37:06,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:06,610 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 2394 transitions. [2021-08-21 18:37:06,610 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) [2021-08-21 18:37:06,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 2394 transitions. [2021-08-21 18:37:06,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:37:06,612 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:06,612 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] [2021-08-21 18:37:06,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:06,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:06,833 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:06,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:06,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1475240072, now seen corresponding path program 31 times [2021-08-21 18:37:06,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:06,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692761380] [2021-08-21 18:37:06,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:06,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:06,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:06,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692761380] [2021-08-21 18:37:06,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692761380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:06,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828335031] [2021-08-21 18:37:06,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:37:06,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:06,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:06,884 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:37:06,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 18:37:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:10,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:37:10,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:10,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:10,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828335031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:10,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:10,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 18:37:10,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273721417] [2021-08-21 18:37:10,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:37:10,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:10,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:37:10,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:37:10,786 INFO L87 Difference]: Start difference. First operand 1052 states and 2394 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) [2021-08-21 18:37:11,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:11,182 INFO L93 Difference]: Finished difference Result 1432 states and 2917 transitions. [2021-08-21 18:37:11,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:37:11,182 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 [2021-08-21 18:37:11,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:11,185 INFO L225 Difference]: With dead ends: 1432 [2021-08-21 18:37:11,185 INFO L226 Difference]: Without dead ends: 1418 [2021-08-21 18:37:11,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 289.5ms TimeCoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:37:11,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-08-21 18:37:11,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1038. [2021-08-21 18:37:11,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 2.2883317261330762) internal successors, (2373), 1037 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:11,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 2373 transitions. [2021-08-21 18:37:11,199 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 2373 transitions. Word has length 28 [2021-08-21 18:37:11,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:11,199 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 2373 transitions. [2021-08-21 18:37:11,199 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) [2021-08-21 18:37:11,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 2373 transitions. [2021-08-21 18:37:11,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:37:11,201 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:11,201 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] [2021-08-21 18:37:11,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:11,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:11,417 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:11,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:11,417 INFO L82 PathProgramCache]: Analyzing trace with hash -750794888, now seen corresponding path program 32 times [2021-08-21 18:37:11,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:11,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478119057] [2021-08-21 18:37:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:11,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:11,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:11,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478119057] [2021-08-21 18:37:11,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478119057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:11,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923874908] [2021-08-21 18:37:11,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:37:11,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:11,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:11,482 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:37:11,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 18:37:15,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:37:15,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:15,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:37:15,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:15,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923874908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:15,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:15,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:37:15,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021131079] [2021-08-21 18:37:15,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:37:15,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:15,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:37:15,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:37:15,370 INFO L87 Difference]: Start difference. First operand 1038 states and 2373 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) [2021-08-21 18:37:15,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:15,654 INFO L93 Difference]: Finished difference Result 1529 states and 3098 transitions. [2021-08-21 18:37:15,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:37:15,654 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 [2021-08-21 18:37:15,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:15,656 INFO L225 Difference]: With dead ends: 1529 [2021-08-21 18:37:15,656 INFO L226 Difference]: Without dead ends: 1505 [2021-08-21 18:37:15,656 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 197.4ms TimeCoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:37:15,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-08-21 18:37:15,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1046. [2021-08-21 18:37:15,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 2.295693779904306) internal successors, (2399), 1045 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:15,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 2399 transitions. [2021-08-21 18:37:15,672 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 2399 transitions. Word has length 28 [2021-08-21 18:37:15,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:15,672 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 2399 transitions. [2021-08-21 18:37:15,672 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) [2021-08-21 18:37:15,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 2399 transitions. [2021-08-21 18:37:15,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:37:15,673 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:15,673 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] [2021-08-21 18:37:15,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:15,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:15,889 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:15,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:15,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1269458952, now seen corresponding path program 33 times [2021-08-21 18:37:15,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:15,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758680691] [2021-08-21 18:37:15,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:15,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:15,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:15,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758680691] [2021-08-21 18:37:15,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758680691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:15,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446484970] [2021-08-21 18:37:15,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:37:15,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:15,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:15,935 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:37:15,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 18:37:19,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:37:19,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:19,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:37:19,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:19,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446484970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:19,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:19,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 18:37:19,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933327626] [2021-08-21 18:37:19,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:37:19,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:19,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:37:19,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:37:19,830 INFO L87 Difference]: Start difference. First operand 1046 states and 2399 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) [2021-08-21 18:37:19,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:19,918 INFO L93 Difference]: Finished difference Result 1187 states and 2590 transitions. [2021-08-21 18:37:19,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:37:19,919 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 [2021-08-21 18:37:19,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:19,920 INFO L225 Difference]: With dead ends: 1187 [2021-08-21 18:37:19,920 INFO L226 Difference]: Without dead ends: 1187 [2021-08-21 18:37:19,921 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:37:19,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-08-21 18:37:19,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 973. [2021-08-21 18:37:19,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 972 states have (on average 2.295267489711934) internal successors, (2231), 972 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:19,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 2231 transitions. [2021-08-21 18:37:19,933 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 2231 transitions. Word has length 28 [2021-08-21 18:37:19,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:19,933 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 2231 transitions. [2021-08-21 18:37:19,933 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) [2021-08-21 18:37:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 2231 transitions. [2021-08-21 18:37:19,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:37:19,934 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:19,934 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] [2021-08-21 18:37:19,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:20,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 18:37:20,152 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:20,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:20,152 INFO L82 PathProgramCache]: Analyzing trace with hash -241891208, now seen corresponding path program 34 times [2021-08-21 18:37:20,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:20,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913440885] [2021-08-21 18:37:20,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:20,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:20,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:20,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913440885] [2021-08-21 18:37:20,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913440885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:20,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789015880] [2021-08-21 18:37:20,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:37:20,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:20,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:20,214 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:37:20,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 18:37:23,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:37:23,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:23,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:37:23,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:24,141 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:24,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789015880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:24,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:24,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 18:37:24,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554854503] [2021-08-21 18:37:24,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:37:24,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:24,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:37:24,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:37:24,142 INFO L87 Difference]: Start difference. First operand 973 states and 2231 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) [2021-08-21 18:37:24,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:24,842 INFO L93 Difference]: Finished difference Result 2938 states and 5918 transitions. [2021-08-21 18:37:24,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 18:37:24,842 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 [2021-08-21 18:37:24,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:24,847 INFO L225 Difference]: With dead ends: 2938 [2021-08-21 18:37:24,847 INFO L226 Difference]: Without dead ends: 2938 [2021-08-21 18:37:24,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 513.0ms TimeCoverageRelationStatistics Valid=827, Invalid=2955, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:37:24,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-08-21 18:37:24,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 914. [2021-08-21 18:37:24,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.2694414019715223) internal successors, (2072), 913 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:24,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2072 transitions. [2021-08-21 18:37:24,868 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2072 transitions. Word has length 28 [2021-08-21 18:37:24,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:24,868 INFO L470 AbstractCegarLoop]: Abstraction has 914 states and 2072 transitions. [2021-08-21 18:37:24,868 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) [2021-08-21 18:37:24,868 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2072 transitions. [2021-08-21 18:37:24,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:37:24,870 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:24,870 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] [2021-08-21 18:37:24,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:25,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-21 18:37:25,085 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:25,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:25,085 INFO L82 PathProgramCache]: Analyzing trace with hash 15931256, now seen corresponding path program 35 times [2021-08-21 18:37:25,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:25,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600801302] [2021-08-21 18:37:25,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:25,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:25,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:25,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600801302] [2021-08-21 18:37:25,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600801302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:25,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532778046] [2021-08-21 18:37:25,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:37:25,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:25,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:25,141 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:37:25,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 18:37:28,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:37:28,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:28,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:37:28,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:29,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532778046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:29,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:29,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:37:29,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437340275] [2021-08-21 18:37:29,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:37:29,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:29,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:37:29,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:37:29,064 INFO L87 Difference]: Start difference. First operand 914 states and 2072 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) [2021-08-21 18:37:29,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:29,412 INFO L93 Difference]: Finished difference Result 1447 states and 2950 transitions. [2021-08-21 18:37:29,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:37:29,412 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 [2021-08-21 18:37:29,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:29,415 INFO L225 Difference]: With dead ends: 1447 [2021-08-21 18:37:29,415 INFO L226 Difference]: Without dead ends: 1443 [2021-08-21 18:37:29,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 232.2ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:37:29,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-08-21 18:37:29,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 982. [2021-08-21 18:37:29,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 2.2996941896024463) internal successors, (2256), 981 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) [2021-08-21 18:37:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 2256 transitions. [2021-08-21 18:37:29,429 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 2256 transitions. Word has length 28 [2021-08-21 18:37:29,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:29,429 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 2256 transitions. [2021-08-21 18:37:29,429 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) [2021-08-21 18:37:29,429 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 2256 transitions. [2021-08-21 18:37:29,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:37:29,430 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:29,430 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] [2021-08-21 18:37:29,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:29,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-21 18:37:29,653 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:29,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:29,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1556453512, now seen corresponding path program 36 times [2021-08-21 18:37:29,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:29,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170182822] [2021-08-21 18:37:29,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:29,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:29,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:29,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170182822] [2021-08-21 18:37:29,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170182822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:29,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704907515] [2021-08-21 18:37:29,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:37:29,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:29,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:29,721 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:37:29,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 18:37:33,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:37:33,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:33,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:37:33,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:33,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704907515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:33,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:33,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:37:33,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863586510] [2021-08-21 18:37:33,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:37:33,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:33,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:37:33,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:37:33,699 INFO L87 Difference]: Start difference. First operand 982 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) [2021-08-21 18:37:34,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:34,106 INFO L93 Difference]: Finished difference Result 1476 states and 3018 transitions. [2021-08-21 18:37:34,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:37:34,106 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 [2021-08-21 18:37:34,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:34,109 INFO L225 Difference]: With dead ends: 1476 [2021-08-21 18:37:34,109 INFO L226 Difference]: Without dead ends: 1476 [2021-08-21 18:37:34,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 271.5ms TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:37:34,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2021-08-21 18:37:34,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 917. [2021-08-21 18:37:34,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 2.2816593886462884) internal successors, (2090), 916 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:34,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 2090 transitions. [2021-08-21 18:37:34,123 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 2090 transitions. Word has length 28 [2021-08-21 18:37:34,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:34,124 INFO L470 AbstractCegarLoop]: Abstraction has 917 states and 2090 transitions. [2021-08-21 18:37:34,124 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) [2021-08-21 18:37:34,124 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 2090 transitions. [2021-08-21 18:37:34,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:37:34,125 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:34,125 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] [2021-08-21 18:37:34,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:34,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:34,326 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:34,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:34,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1279463288, now seen corresponding path program 37 times [2021-08-21 18:37:34,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:34,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984454763] [2021-08-21 18:37:34,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:34,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:34,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:34,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:34,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984454763] [2021-08-21 18:37:34,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984454763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:34,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595848222] [2021-08-21 18:37:34,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:37:34,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:34,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:34,377 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:37:34,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 18:37:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:38,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:37:38,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:38,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595848222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:38,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:38,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-21 18:37:38,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477774466] [2021-08-21 18:37:38,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:37:38,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:38,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:37:38,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:37:38,353 INFO L87 Difference]: Start difference. First operand 917 states and 2090 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) [2021-08-21 18:37:38,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:38,791 INFO L93 Difference]: Finished difference Result 1494 states and 3106 transitions. [2021-08-21 18:37:38,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:37:38,791 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 [2021-08-21 18:37:38,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:38,793 INFO L225 Difference]: With dead ends: 1494 [2021-08-21 18:37:38,793 INFO L226 Difference]: Without dead ends: 1492 [2021-08-21 18:37:38,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:37:38,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-08-21 18:37:38,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1064. [2021-08-21 18:37:38,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 2.2897460018814675) internal successors, (2434), 1063 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:38,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 2434 transitions. [2021-08-21 18:37:38,808 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 2434 transitions. Word has length 28 [2021-08-21 18:37:38,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:38,808 INFO L470 AbstractCegarLoop]: Abstraction has 1064 states and 2434 transitions. [2021-08-21 18:37:38,808 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) [2021-08-21 18:37:38,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 2434 transitions. [2021-08-21 18:37:38,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:37:38,810 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:38,810 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] [2021-08-21 18:37:38,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:39,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:39,029 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:39,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:39,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1823037576, now seen corresponding path program 38 times [2021-08-21 18:37:39,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:39,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125514816] [2021-08-21 18:37:39,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:39,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:39,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:39,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125514816] [2021-08-21 18:37:39,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125514816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:39,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952955803] [2021-08-21 18:37:39,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:37:39,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:39,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:39,080 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:37:39,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 18:37:42,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:37:42,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:42,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:37:42,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:43,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952955803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:43,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:43,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-21 18:37:43,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899078191] [2021-08-21 18:37:43,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:37:43,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:43,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:37:43,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:37:43,122 INFO L87 Difference]: Start difference. First operand 1064 states and 2434 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) [2021-08-21 18:37:43,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:43,737 INFO L93 Difference]: Finished difference Result 1547 states and 3209 transitions. [2021-08-21 18:37:43,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 18:37:43,737 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 [2021-08-21 18:37:43,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:43,739 INFO L225 Difference]: With dead ends: 1547 [2021-08-21 18:37:43,739 INFO L226 Difference]: Without dead ends: 1547 [2021-08-21 18:37:43,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 408.1ms TimeCoverageRelationStatistics Valid=597, Invalid=1565, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:37:43,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-08-21 18:37:43,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1064. [2021-08-21 18:37:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 2.2869238005644403) internal successors, (2431), 1063 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:43,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 2431 transitions. [2021-08-21 18:37:43,754 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 2431 transitions. Word has length 28 [2021-08-21 18:37:43,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:43,754 INFO L470 AbstractCegarLoop]: Abstraction has 1064 states and 2431 transitions. [2021-08-21 18:37:43,754 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) [2021-08-21 18:37:43,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 2431 transitions. [2021-08-21 18:37:43,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:37:43,756 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:43,756 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] [2021-08-21 18:37:43,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:43,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-21 18:37:43,956 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:43,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:43,957 INFO L82 PathProgramCache]: Analyzing trace with hash 205561912, now seen corresponding path program 39 times [2021-08-21 18:37:43,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:43,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010916865] [2021-08-21 18:37:43,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:43,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:44,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:44,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010916865] [2021-08-21 18:37:44,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010916865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:44,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315215291] [2021-08-21 18:37:44,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:37:44,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:44,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:44,026 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:37:44,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 18:37:47,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:37:47,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:47,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:37:47,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:48,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315215291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:48,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:48,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 18:37:48,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353735957] [2021-08-21 18:37:48,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:37:48,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:48,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:37:48,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:37:48,091 INFO L87 Difference]: Start difference. First operand 1064 states and 2431 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) [2021-08-21 18:37:48,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:48,302 INFO L93 Difference]: Finished difference Result 1603 states and 3488 transitions. [2021-08-21 18:37:48,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:37:48,302 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 [2021-08-21 18:37:48,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:48,304 INFO L225 Difference]: With dead ends: 1603 [2021-08-21 18:37:48,304 INFO L226 Difference]: Without dead ends: 1591 [2021-08-21 18:37:48,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 137.1ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:37:48,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2021-08-21 18:37:48,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1198. [2021-08-21 18:37:48,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 2.3049289891395155) internal successors, (2759), 1197 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:48,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 2759 transitions. [2021-08-21 18:37:48,317 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 2759 transitions. Word has length 28 [2021-08-21 18:37:48,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:48,317 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 2759 transitions. [2021-08-21 18:37:48,317 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) [2021-08-21 18:37:48,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 2759 transitions. [2021-08-21 18:37:48,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:37:48,318 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:48,318 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] [2021-08-21 18:37:48,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:48,519 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,SelfDestructingSolverStorable65 [2021-08-21 18:37:48,519 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:48,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:48,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1005529464, now seen corresponding path program 40 times [2021-08-21 18:37:48,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:48,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854594112] [2021-08-21 18:37:48,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:48,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:37:48,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:48,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854594112] [2021-08-21 18:37:48,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854594112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:48,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195855690] [2021-08-21 18:37:48,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:37:48,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:48,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:48,581 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:37:48,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 18:37:52,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:37:52,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:52,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:37:52,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:37:52,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195855690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:52,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:52,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-21 18:37:52,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308741078] [2021-08-21 18:37:52,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:37:52,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:52,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:37:52,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:37:52,582 INFO L87 Difference]: Start difference. First operand 1198 states and 2759 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) [2021-08-21 18:37:52,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:52,668 INFO L93 Difference]: Finished difference Result 1259 states and 2863 transitions. [2021-08-21 18:37:52,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:37:52,668 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 [2021-08-21 18:37:52,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:52,670 INFO L225 Difference]: With dead ends: 1259 [2021-08-21 18:37:52,670 INFO L226 Difference]: Without dead ends: 1259 [2021-08-21 18:37:52,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:37:52,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-08-21 18:37:52,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1226. [2021-08-21 18:37:52,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 2.2987755102040817) internal successors, (2816), 1225 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:52,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 2816 transitions. [2021-08-21 18:37:52,682 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 2816 transitions. Word has length 28 [2021-08-21 18:37:52,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:52,682 INFO L470 AbstractCegarLoop]: Abstraction has 1226 states and 2816 transitions. [2021-08-21 18:37:52,682 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) [2021-08-21 18:37:52,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 2816 transitions. [2021-08-21 18:37:52,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:37:52,683 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:52,683 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] [2021-08-21 18:37:52,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:52,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:52,897 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:52,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:52,897 INFO L82 PathProgramCache]: Analyzing trace with hash -717941764, now seen corresponding path program 41 times [2021-08-21 18:37:52,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:52,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997747070] [2021-08-21 18:37:52,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:52,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:53,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:53,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:53,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997747070] [2021-08-21 18:37:53,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997747070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:53,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331700027] [2021-08-21 18:37:53,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:37:53,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:53,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:53,006 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:37:53,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 18:37:57,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:37:57,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:57,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:37:57,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:57,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331700027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:57,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:57,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 18:37:57,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205225355] [2021-08-21 18:37:57,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:37:57,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:57,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:37:57,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:37:57,152 INFO L87 Difference]: Start difference. First operand 1226 states and 2816 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) [2021-08-21 18:37:57,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:57,354 INFO L93 Difference]: Finished difference Result 1463 states and 3214 transitions. [2021-08-21 18:37:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:37:57,354 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 [2021-08-21 18:37:57,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:57,356 INFO L225 Difference]: With dead ends: 1463 [2021-08-21 18:37:57,356 INFO L226 Difference]: Without dead ends: 1455 [2021-08-21 18:37:57,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 186.6ms TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:37:57,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-08-21 18:37:57,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1328. [2021-08-21 18:37:57,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 2.3044461190655614) internal successors, (3058), 1327 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:57,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 3058 transitions. [2021-08-21 18:37:57,372 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 3058 transitions. Word has length 28 [2021-08-21 18:37:57,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:57,372 INFO L470 AbstractCegarLoop]: Abstraction has 1328 states and 3058 transitions. [2021-08-21 18:37:57,372 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) [2021-08-21 18:37:57,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 3058 transitions. [2021-08-21 18:37:57,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:37:57,374 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:57,374 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] [2021-08-21 18:37:57,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:57,584 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,SelfDestructingSolverStorable67 [2021-08-21 18:37:57,584 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:57,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:57,585 INFO L82 PathProgramCache]: Analyzing trace with hash 2004640764, now seen corresponding path program 42 times [2021-08-21 18:37:57,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:57,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894421300] [2021-08-21 18:37:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:57,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:37:57,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:57,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894421300] [2021-08-21 18:37:57,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894421300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:57,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906191292] [2021-08-21 18:37:57,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:37:57,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:57,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:57,658 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:37:57,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 18:38:01,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:38:01,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:01,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:38:01,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:01,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:38:01,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906191292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:01,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:01,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 18:38:01,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424177395] [2021-08-21 18:38:01,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:38:01,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:01,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:38:01,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:38:01,877 INFO L87 Difference]: Start difference. First operand 1328 states and 3058 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) [2021-08-21 18:38:02,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:02,146 INFO L93 Difference]: Finished difference Result 1427 states and 3180 transitions. [2021-08-21 18:38:02,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:38:02,147 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 [2021-08-21 18:38:02,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:02,148 INFO L225 Difference]: With dead ends: 1427 [2021-08-21 18:38:02,148 INFO L226 Difference]: Without dead ends: 1427 [2021-08-21 18:38:02,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:38:02,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2021-08-21 18:38:02,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1300. [2021-08-21 18:38:02,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 2.3040800615858354) internal successors, (2993), 1299 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:02,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 2993 transitions. [2021-08-21 18:38:02,162 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 2993 transitions. Word has length 28 [2021-08-21 18:38:02,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:02,162 INFO L470 AbstractCegarLoop]: Abstraction has 1300 states and 2993 transitions. [2021-08-21 18:38:02,162 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) [2021-08-21 18:38:02,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 2993 transitions. [2021-08-21 18:38:02,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:02,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:02,163 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] [2021-08-21 18:38:02,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 18:38:02,364 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,SelfDestructingSolverStorable68 [2021-08-21 18:38:02,364 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:02,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:02,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1597099644, now seen corresponding path program 43 times [2021-08-21 18:38:02,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:02,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535650184] [2021-08-21 18:38:02,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:02,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:02,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:02,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535650184] [2021-08-21 18:38:02,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535650184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:02,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104236514] [2021-08-21 18:38:02,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:38:02,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:02,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:02,422 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:38:02,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 18:38:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:06,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:38:06,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:06,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:06,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104236514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:06,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:06,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 18:38:06,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249560677] [2021-08-21 18:38:06,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:38:06,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:06,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:38:06,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:38:06,439 INFO L87 Difference]: Start difference. First operand 1300 states and 2993 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) [2021-08-21 18:38:06,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:06,717 INFO L93 Difference]: Finished difference Result 1453 states and 3270 transitions. [2021-08-21 18:38:06,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:38:06,718 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 [2021-08-21 18:38:06,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:06,719 INFO L225 Difference]: With dead ends: 1453 [2021-08-21 18:38:06,719 INFO L226 Difference]: Without dead ends: 1453 [2021-08-21 18:38:06,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=258, Invalid=612, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:38:06,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-08-21 18:38:06,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1330. [2021-08-21 18:38:06,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 2.292701279157261) internal successors, (3047), 1329 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:06,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 3047 transitions. [2021-08-21 18:38:06,733 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 3047 transitions. Word has length 28 [2021-08-21 18:38:06,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:06,733 INFO L470 AbstractCegarLoop]: Abstraction has 1330 states and 3047 transitions. [2021-08-21 18:38:06,733 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) [2021-08-21 18:38:06,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 3047 transitions. [2021-08-21 18:38:06,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:06,735 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:06,735 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] [2021-08-21 18:38:06,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-21 18:38:06,935 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,SelfDestructingSolverStorable69 [2021-08-21 18:38:06,935 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:06,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:06,935 INFO L82 PathProgramCache]: Analyzing trace with hash -527973576, now seen corresponding path program 44 times [2021-08-21 18:38:06,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:06,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489509385] [2021-08-21 18:38:06,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:06,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:38:06,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:06,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489509385] [2021-08-21 18:38:06,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489509385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:06,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438885340] [2021-08-21 18:38:06,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:38:06,997 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:06,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:06,998 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:38:07,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 18:38:10,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:38:10,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:10,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:38:10,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:11,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438885340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:11,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:11,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-21 18:38:11,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276693122] [2021-08-21 18:38:11,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:38:11,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:11,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:38:11,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:38:11,110 INFO L87 Difference]: Start difference. First operand 1330 states and 3047 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) [2021-08-21 18:38:11,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:11,770 INFO L93 Difference]: Finished difference Result 2982 states and 6146 transitions. [2021-08-21 18:38:11,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 18:38:11,771 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 [2021-08-21 18:38:11,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:11,774 INFO L225 Difference]: With dead ends: 2982 [2021-08-21 18:38:11,774 INFO L226 Difference]: Without dead ends: 2982 [2021-08-21 18:38:11,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 465.8ms TimeCoverageRelationStatistics Valid=723, Invalid=2357, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:38:11,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2021-08-21 18:38:11,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 1380. [2021-08-21 18:38:11,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.295141406816534) internal successors, (3165), 1379 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:11,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3165 transitions. [2021-08-21 18:38:11,795 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3165 transitions. Word has length 28 [2021-08-21 18:38:11,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:11,795 INFO L470 AbstractCegarLoop]: Abstraction has 1380 states and 3165 transitions. [2021-08-21 18:38:11,795 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) [2021-08-21 18:38:11,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3165 transitions. [2021-08-21 18:38:11,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:11,797 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:11,797 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] [2021-08-21 18:38:11,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-21 18:38:11,998 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,SelfDestructingSolverStorable70 [2021-08-21 18:38:11,998 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:11,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:11,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1579596472, now seen corresponding path program 25 times [2021-08-21 18:38:11,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:11,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994653789] [2021-08-21 18:38:11,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:11,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:38:12,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:12,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994653789] [2021-08-21 18:38:12,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994653789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:12,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534595964] [2021-08-21 18:38:12,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:38:12,064 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:12,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:12,065 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:38:12,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 18:38:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:16,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:38:16,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:16,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534595964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:16,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:16,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-08-21 18:38:16,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430682882] [2021-08-21 18:38:16,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:38:16,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:16,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:38:16,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:38:16,264 INFO L87 Difference]: Start difference. First operand 1380 states and 3165 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) [2021-08-21 18:38:16,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:16,773 INFO L93 Difference]: Finished difference Result 2733 states and 5637 transitions. [2021-08-21 18:38:16,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:38:16,773 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 [2021-08-21 18:38:16,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:16,777 INFO L225 Difference]: With dead ends: 2733 [2021-08-21 18:38:16,777 INFO L226 Difference]: Without dead ends: 2733 [2021-08-21 18:38:16,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 376.4ms TimeCoverageRelationStatistics Valid=547, Invalid=1523, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:38:16,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2021-08-21 18:38:16,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 1378. [2021-08-21 18:38:16,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 2.2941176470588234) internal successors, (3159), 1377 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:16,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 3159 transitions. [2021-08-21 18:38:16,796 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 3159 transitions. Word has length 28 [2021-08-21 18:38:16,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:16,796 INFO L470 AbstractCegarLoop]: Abstraction has 1378 states and 3159 transitions. [2021-08-21 18:38:16,796 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) [2021-08-21 18:38:16,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 3159 transitions. [2021-08-21 18:38:16,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:16,798 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:16,798 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] [2021-08-21 18:38:16,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 18:38:16,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:16,998 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:16,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:16,999 INFO L82 PathProgramCache]: Analyzing trace with hash 2088628792, now seen corresponding path program 45 times [2021-08-21 18:38:16,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:16,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153239201] [2021-08-21 18:38:16,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:16,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:38:17,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:17,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153239201] [2021-08-21 18:38:17,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153239201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:17,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983625298] [2021-08-21 18:38:17,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:38:17,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:17,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:17,070 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:38:17,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 18:38:20,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:38:20,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:20,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:38:20,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:21,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983625298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:21,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:21,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-21 18:38:21,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636555510] [2021-08-21 18:38:21,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:38:21,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:21,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:38:21,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:38:21,128 INFO L87 Difference]: Start difference. First operand 1378 states and 3159 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) [2021-08-21 18:38:21,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:21,427 INFO L93 Difference]: Finished difference Result 1900 states and 4088 transitions. [2021-08-21 18:38:21,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:38:21,427 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 [2021-08-21 18:38:21,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:21,429 INFO L225 Difference]: With dead ends: 1900 [2021-08-21 18:38:21,429 INFO L226 Difference]: Without dead ends: 1894 [2021-08-21 18:38:21,430 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 198.5ms TimeCoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:38:21,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-08-21 18:38:21,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1577. [2021-08-21 18:38:21,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1576 states have (on average 2.311548223350254) internal successors, (3643), 1576 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:21,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 3643 transitions. [2021-08-21 18:38:21,449 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 3643 transitions. Word has length 28 [2021-08-21 18:38:21,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:21,449 INFO L470 AbstractCegarLoop]: Abstraction has 1577 states and 3643 transitions. [2021-08-21 18:38:21,449 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) [2021-08-21 18:38:21,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 3643 transitions. [2021-08-21 18:38:21,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:21,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:21,451 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] [2021-08-21 18:38:21,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 18:38:21,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:21,651 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:21,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:21,652 INFO L82 PathProgramCache]: Analyzing trace with hash -676222408, now seen corresponding path program 46 times [2021-08-21 18:38:21,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:21,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124334081] [2021-08-21 18:38:21,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:21,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:38:21,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:21,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124334081] [2021-08-21 18:38:21,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124334081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:21,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640202773] [2021-08-21 18:38:21,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:38:21,700 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:21,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:21,700 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:38:21,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 18:38:25,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:38:25,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:25,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:38:25,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:25,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640202773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:25,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:25,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-21 18:38:25,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197012083] [2021-08-21 18:38:25,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:38:25,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:25,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:38:25,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:38:25,797 INFO L87 Difference]: Start difference. First operand 1577 states and 3643 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) [2021-08-21 18:38:26,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:26,122 INFO L93 Difference]: Finished difference Result 1892 states and 4073 transitions. [2021-08-21 18:38:26,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:38:26,123 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 [2021-08-21 18:38:26,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:26,125 INFO L225 Difference]: With dead ends: 1892 [2021-08-21 18:38:26,125 INFO L226 Difference]: Without dead ends: 1886 [2021-08-21 18:38:26,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 202.7ms TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:38:26,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2021-08-21 18:38:26,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1551. [2021-08-21 18:38:26,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1550 states have (on average 2.3103225806451615) internal successors, (3581), 1550 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:26,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 3581 transitions. [2021-08-21 18:38:26,144 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 3581 transitions. Word has length 28 [2021-08-21 18:38:26,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:26,144 INFO L470 AbstractCegarLoop]: Abstraction has 1551 states and 3581 transitions. [2021-08-21 18:38:26,144 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) [2021-08-21 18:38:26,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 3581 transitions. [2021-08-21 18:38:26,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:26,146 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:26,146 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] [2021-08-21 18:38:26,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 18:38:26,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:26,346 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:26,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:26,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1292601912, now seen corresponding path program 47 times [2021-08-21 18:38:26,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:26,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954998675] [2021-08-21 18:38:26,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:26,347 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:26,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:26,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:26,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954998675] [2021-08-21 18:38:26,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954998675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:26,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065648666] [2021-08-21 18:38:26,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:38:26,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:26,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:26,397 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:38:26,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 18:38:30,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:38:30,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:30,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:38:30,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:30,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065648666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:30,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:30,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-21 18:38:30,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411451297] [2021-08-21 18:38:30,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:38:30,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:30,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:38:30,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:38:30,466 INFO L87 Difference]: Start difference. First operand 1551 states and 3581 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) [2021-08-21 18:38:30,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:30,788 INFO L93 Difference]: Finished difference Result 1936 states and 4168 transitions. [2021-08-21 18:38:30,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:38:30,788 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 [2021-08-21 18:38:30,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:30,790 INFO L225 Difference]: With dead ends: 1936 [2021-08-21 18:38:30,790 INFO L226 Difference]: Without dead ends: 1932 [2021-08-21 18:38:30,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:38:30,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1932 states. [2021-08-21 18:38:30,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1932 to 1551. [2021-08-21 18:38:30,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1550 states have (on average 2.309032258064516) internal successors, (3579), 1550 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:30,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 3579 transitions. [2021-08-21 18:38:30,809 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 3579 transitions. Word has length 28 [2021-08-21 18:38:30,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:30,809 INFO L470 AbstractCegarLoop]: Abstraction has 1551 states and 3579 transitions. [2021-08-21 18:38:30,809 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) [2021-08-21 18:38:30,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 3579 transitions. [2021-08-21 18:38:30,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:30,811 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:30,811 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] [2021-08-21 18:38:30,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 18:38:31,011 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,SelfDestructingSolverStorable74 [2021-08-21 18:38:31,011 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:31,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:31,012 INFO L82 PathProgramCache]: Analyzing trace with hash -279782856, now seen corresponding path program 48 times [2021-08-21 18:38:31,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:31,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992770235] [2021-08-21 18:38:31,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:31,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:31,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:31,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992770235] [2021-08-21 18:38:31,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992770235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:31,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365547847] [2021-08-21 18:38:31,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:38:31,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:31,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:31,067 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:38:31,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 18:38:35,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:38:35,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:35,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:38:35,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:35,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365547847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:35,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:35,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-21 18:38:35,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36628945] [2021-08-21 18:38:35,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:38:35,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:35,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:38:35,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:38:35,148 INFO L87 Difference]: Start difference. First operand 1551 states and 3579 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) [2021-08-21 18:38:35,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:35,668 INFO L93 Difference]: Finished difference Result 1969 states and 4272 transitions. [2021-08-21 18:38:35,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 18:38:35,668 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 [2021-08-21 18:38:35,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:35,670 INFO L225 Difference]: With dead ends: 1969 [2021-08-21 18:38:35,670 INFO L226 Difference]: Without dead ends: 1969 [2021-08-21 18:38:35,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 358.7ms TimeCoverageRelationStatistics Valid=455, Invalid=1351, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:38:35,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2021-08-21 18:38:35,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1536. [2021-08-21 18:38:35,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.3140065146579802) internal successors, (3552), 1535 states have internal predecessors, (3552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:35,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3552 transitions. [2021-08-21 18:38:35,688 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3552 transitions. Word has length 28 [2021-08-21 18:38:35,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:35,688 INFO L470 AbstractCegarLoop]: Abstraction has 1536 states and 3552 transitions. [2021-08-21 18:38:35,688 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) [2021-08-21 18:38:35,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3552 transitions. [2021-08-21 18:38:35,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:35,690 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:35,690 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] [2021-08-21 18:38:35,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 18:38:35,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:35,891 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:35,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:35,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1013904380, now seen corresponding path program 49 times [2021-08-21 18:38:35,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:35,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002552042] [2021-08-21 18:38:35,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:35,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:35,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:35,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002552042] [2021-08-21 18:38:35,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002552042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:35,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742152490] [2021-08-21 18:38:35,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:38:35,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:35,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:35,952 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:38:35,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 18:38:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:39,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:38:39,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:40,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742152490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:40,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:40,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:38:40,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557400369] [2021-08-21 18:38:40,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:38:40,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:40,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:38:40,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:38:40,063 INFO L87 Difference]: Start difference. First operand 1536 states and 3552 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) [2021-08-21 18:38:40,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:40,374 INFO L93 Difference]: Finished difference Result 1987 states and 4321 transitions. [2021-08-21 18:38:40,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:38:40,375 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 [2021-08-21 18:38:40,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:40,377 INFO L225 Difference]: With dead ends: 1987 [2021-08-21 18:38:40,377 INFO L226 Difference]: Without dead ends: 1983 [2021-08-21 18:38:40,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:38:40,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-08-21 18:38:40,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1543. [2021-08-21 18:38:40,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1543 states, 1542 states have (on average 2.32295719844358) internal successors, (3582), 1542 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:40,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 3582 transitions. [2021-08-21 18:38:40,395 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 3582 transitions. Word has length 28 [2021-08-21 18:38:40,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:40,395 INFO L470 AbstractCegarLoop]: Abstraction has 1543 states and 3582 transitions. [2021-08-21 18:38:40,395 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) [2021-08-21 18:38:40,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 3582 transitions. [2021-08-21 18:38:40,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:40,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:40,397 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] [2021-08-21 18:38:40,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-21 18:38:40,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:40,598 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:40,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:40,598 INFO L82 PathProgramCache]: Analyzing trace with hash -558480388, now seen corresponding path program 50 times [2021-08-21 18:38:40,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:40,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093014711] [2021-08-21 18:38:40,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:40,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:40,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:40,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093014711] [2021-08-21 18:38:40,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093014711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:40,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979019814] [2021-08-21 18:38:40,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:38:40,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:40,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:40,655 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:38:40,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 18:38:44,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:38:44,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:44,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:38:44,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:44,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:44,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979019814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:44,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:44,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:38:44,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88168593] [2021-08-21 18:38:44,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:38:44,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:44,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:38:44,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:38:44,806 INFO L87 Difference]: Start difference. First operand 1543 states and 3582 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) [2021-08-21 18:38:45,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:45,272 INFO L93 Difference]: Finished difference Result 1769 states and 3909 transitions. [2021-08-21 18:38:45,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:38:45,272 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 [2021-08-21 18:38:45,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:45,274 INFO L225 Difference]: With dead ends: 1769 [2021-08-21 18:38:45,274 INFO L226 Difference]: Without dead ends: 1769 [2021-08-21 18:38:45,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 312.6ms TimeCoverageRelationStatistics Valid=467, Invalid=1255, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:38:45,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2021-08-21 18:38:45,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1531. [2021-08-21 18:38:45,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 2.3222222222222224) internal successors, (3553), 1530 states have internal predecessors, (3553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:45,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 3553 transitions. [2021-08-21 18:38:45,291 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 3553 transitions. Word has length 28 [2021-08-21 18:38:45,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:45,291 INFO L470 AbstractCegarLoop]: Abstraction has 1531 states and 3553 transitions. [2021-08-21 18:38:45,291 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) [2021-08-21 18:38:45,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 3553 transitions. [2021-08-21 18:38:45,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:45,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:45,293 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] [2021-08-21 18:38:45,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-21 18:38:45,494 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,SelfDestructingSolverStorable77 [2021-08-21 18:38:45,495 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:45,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:45,495 INFO L82 PathProgramCache]: Analyzing trace with hash -916332608, now seen corresponding path program 51 times [2021-08-21 18:38:45,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:45,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042897751] [2021-08-21 18:38:45,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:45,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:45,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:45,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042897751] [2021-08-21 18:38:45,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042897751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:45,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589953591] [2021-08-21 18:38:45,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:38:45,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:45,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:45,551 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:38:45,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 18:38:49,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:38:49,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:49,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:38:49,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:49,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589953591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:49,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:49,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:38:49,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762744511] [2021-08-21 18:38:49,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:38:49,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:49,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:38:49,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:38:49,707 INFO L87 Difference]: Start difference. First operand 1531 states and 3553 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) [2021-08-21 18:38:50,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:50,234 INFO L93 Difference]: Finished difference Result 1958 states and 4345 transitions. [2021-08-21 18:38:50,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:38:50,234 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 [2021-08-21 18:38:50,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:50,236 INFO L225 Difference]: With dead ends: 1958 [2021-08-21 18:38:50,236 INFO L226 Difference]: Without dead ends: 1958 [2021-08-21 18:38:50,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 376.6ms TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:38:50,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2021-08-21 18:38:50,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1568. [2021-08-21 18:38:50,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 2.3197192086790044) internal successors, (3635), 1567 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:50,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 3635 transitions. [2021-08-21 18:38:50,253 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 3635 transitions. Word has length 28 [2021-08-21 18:38:50,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:50,253 INFO L470 AbstractCegarLoop]: Abstraction has 1568 states and 3635 transitions. [2021-08-21 18:38:50,254 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) [2021-08-21 18:38:50,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 3635 transitions. [2021-08-21 18:38:50,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:50,256 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:50,256 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] [2021-08-21 18:38:50,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-21 18:38:50,462 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,SelfDestructingSolverStorable78 [2021-08-21 18:38:50,462 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:50,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:50,462 INFO L82 PathProgramCache]: Analyzing trace with hash 449185148, now seen corresponding path program 26 times [2021-08-21 18:38:50,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:50,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817173569] [2021-08-21 18:38:50,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:50,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:50,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:50,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817173569] [2021-08-21 18:38:50,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817173569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:50,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118421757] [2021-08-21 18:38:50,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:38:50,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:50,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:50,522 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:38:50,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 18:38:54,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:38:54,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:54,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:38:54,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:54,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118421757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:54,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:54,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-21 18:38:54,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851440103] [2021-08-21 18:38:54,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:38:54,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:54,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:38:54,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:38:54,730 INFO L87 Difference]: Start difference. First operand 1568 states and 3635 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) [2021-08-21 18:38:55,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:55,694 INFO L93 Difference]: Finished difference Result 6175 states and 12537 transitions. [2021-08-21 18:38:55,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-21 18:38:55,694 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 [2021-08-21 18:38:55,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:55,702 INFO L225 Difference]: With dead ends: 6175 [2021-08-21 18:38:55,702 INFO L226 Difference]: Without dead ends: 6175 [2021-08-21 18:38:55,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 710.1ms TimeCoverageRelationStatistics Valid=1259, Invalid=4291, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 18:38:55,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6175 states. [2021-08-21 18:38:55,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6175 to 2203. [2021-08-21 18:38:55,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 2.362851952770209) internal successors, (5203), 2202 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:55,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 5203 transitions. [2021-08-21 18:38:55,752 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 5203 transitions. Word has length 28 [2021-08-21 18:38:55,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:55,752 INFO L470 AbstractCegarLoop]: Abstraction has 2203 states and 5203 transitions. [2021-08-21 18:38:55,752 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) [2021-08-21 18:38:55,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 5203 transitions. [2021-08-21 18:38:55,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:55,755 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:55,755 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] [2021-08-21 18:38:55,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 18:38:55,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:55,955 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:55,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:55,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1972617152, now seen corresponding path program 52 times [2021-08-21 18:38:55,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:55,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690323303] [2021-08-21 18:38:55,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:55,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:56,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:56,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690323303] [2021-08-21 18:38:56,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690323303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:56,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207079322] [2021-08-21 18:38:56,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:38:56,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:56,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:56,018 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:38:56,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 18:39:00,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:39:00,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:00,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:39:00,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:00,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207079322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:00,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:00,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 18:39:00,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023656674] [2021-08-21 18:39:00,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:39:00,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:00,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:39:00,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:39:00,285 INFO L87 Difference]: Start difference. First operand 2203 states and 5203 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) [2021-08-21 18:39:00,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:00,869 INFO L93 Difference]: Finished difference Result 2688 states and 6122 transitions. [2021-08-21 18:39:00,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 18:39:00,869 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 [2021-08-21 18:39:00,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:00,872 INFO L225 Difference]: With dead ends: 2688 [2021-08-21 18:39:00,872 INFO L226 Difference]: Without dead ends: 2688 [2021-08-21 18:39:00,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 395.3ms TimeCoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:39:00,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-08-21 18:39:00,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2276. [2021-08-21 18:39:00,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 2.349010989010989) internal successors, (5344), 2275 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:00,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 5344 transitions. [2021-08-21 18:39:00,898 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 5344 transitions. Word has length 28 [2021-08-21 18:39:00,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:00,898 INFO L470 AbstractCegarLoop]: Abstraction has 2276 states and 5344 transitions. [2021-08-21 18:39:00,899 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) [2021-08-21 18:39:00,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 5344 transitions. [2021-08-21 18:39:00,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:00,901 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:00,901 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] [2021-08-21 18:39:00,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:01,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:01,102 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:01,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:01,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1586685124, now seen corresponding path program 53 times [2021-08-21 18:39:01,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:01,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580698126] [2021-08-21 18:39:01,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:01,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:01,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:01,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580698126] [2021-08-21 18:39:01,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580698126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:01,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443817941] [2021-08-21 18:39:01,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:39:01,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:01,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:01,173 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:01,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 18:39:05,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:39:05,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:05,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:39:05,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:39:05,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443817941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:05,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:05,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 18:39:05,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434197379] [2021-08-21 18:39:05,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:39:05,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:05,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:39:05,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:39:05,451 INFO L87 Difference]: Start difference. First operand 2276 states and 5344 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) [2021-08-21 18:39:05,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:05,836 INFO L93 Difference]: Finished difference Result 4541 states and 9591 transitions. [2021-08-21 18:39:05,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:39:05,836 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 [2021-08-21 18:39:05,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:05,841 INFO L225 Difference]: With dead ends: 4541 [2021-08-21 18:39:05,841 INFO L226 Difference]: Without dead ends: 4541 [2021-08-21 18:39:05,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 274.7ms TimeCoverageRelationStatistics Valid=390, Invalid=1250, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:39:05,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4541 states. [2021-08-21 18:39:05,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4541 to 2472. [2021-08-21 18:39:05,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.360178065560502) internal successors, (5832), 2471 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:05,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 5832 transitions. [2021-08-21 18:39:05,878 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 5832 transitions. Word has length 28 [2021-08-21 18:39:05,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:05,878 INFO L470 AbstractCegarLoop]: Abstraction has 2472 states and 5832 transitions. [2021-08-21 18:39:05,878 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) [2021-08-21 18:39:05,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 5832 transitions. [2021-08-21 18:39:05,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:05,881 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:05,881 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] [2021-08-21 18:39:05,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:06,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-08-21 18:39:06,081 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:06,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:06,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1216787260, now seen corresponding path program 54 times [2021-08-21 18:39:06,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:06,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116848699] [2021-08-21 18:39:06,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:06,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:06,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:06,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:06,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116848699] [2021-08-21 18:39:06,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116848699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:06,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089218287] [2021-08-21 18:39:06,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:39:06,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:06,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:06,147 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:06,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 18:39:10,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:39:10,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:10,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:39:10,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:39:10,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089218287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:10,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:10,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 18:39:10,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437650596] [2021-08-21 18:39:10,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:39:10,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:10,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:39:10,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:39:10,390 INFO L87 Difference]: Start difference. First operand 2472 states and 5832 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) [2021-08-21 18:39:11,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:11,043 INFO L93 Difference]: Finished difference Result 4904 states and 10250 transitions. [2021-08-21 18:39:11,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 18:39:11,043 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 [2021-08-21 18:39:11,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:11,049 INFO L225 Difference]: With dead ends: 4904 [2021-08-21 18:39:11,049 INFO L226 Difference]: Without dead ends: 4904 [2021-08-21 18:39:11,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 460.9ms TimeCoverageRelationStatistics Valid=750, Invalid=2672, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:39:11,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4904 states. [2021-08-21 18:39:11,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4904 to 2405. [2021-08-21 18:39:11,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2405 states, 2404 states have (on average 2.3398502495840265) internal successors, (5625), 2404 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:11,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 5625 transitions. [2021-08-21 18:39:11,088 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 5625 transitions. Word has length 28 [2021-08-21 18:39:11,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:11,088 INFO L470 AbstractCegarLoop]: Abstraction has 2405 states and 5625 transitions. [2021-08-21 18:39:11,088 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) [2021-08-21 18:39:11,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 5625 transitions. [2021-08-21 18:39:11,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:11,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:11,091 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] [2021-08-21 18:39:11,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:11,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:11,291 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:11,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:11,292 INFO L82 PathProgramCache]: Analyzing trace with hash -893490760, now seen corresponding path program 55 times [2021-08-21 18:39:11,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:11,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854957238] [2021-08-21 18:39:11,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:11,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:39:11,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:11,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854957238] [2021-08-21 18:39:11,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854957238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:11,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923088990] [2021-08-21 18:39:11,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:39:11,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:11,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:11,346 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:11,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 18:39:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:15,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:39:15,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:39:15,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923088990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:15,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:15,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-21 18:39:15,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819870356] [2021-08-21 18:39:15,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:39:15,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:15,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:39:15,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:39:15,599 INFO L87 Difference]: Start difference. First operand 2405 states and 5625 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) [2021-08-21 18:39:15,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:15,675 INFO L93 Difference]: Finished difference Result 3019 states and 6866 transitions. [2021-08-21 18:39:15,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:39:15,675 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 [2021-08-21 18:39:15,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:15,678 INFO L225 Difference]: With dead ends: 3019 [2021-08-21 18:39:15,678 INFO L226 Difference]: Without dead ends: 3017 [2021-08-21 18:39:15,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:39:15,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2021-08-21 18:39:15,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 2483. [2021-08-21 18:39:15,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 2.343674456083803) internal successors, (5817), 2482 states have internal predecessors, (5817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:15,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 5817 transitions. [2021-08-21 18:39:15,708 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 5817 transitions. Word has length 28 [2021-08-21 18:39:15,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:15,708 INFO L470 AbstractCegarLoop]: Abstraction has 2483 states and 5817 transitions. [2021-08-21 18:39:15,708 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) [2021-08-21 18:39:15,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 5817 transitions. [2021-08-21 18:39:15,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:15,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:15,711 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] [2021-08-21 18:39:15,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:15,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:15,913 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:15,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:15,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1551728952, now seen corresponding path program 56 times [2021-08-21 18:39:15,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:15,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143307063] [2021-08-21 18:39:15,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:15,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:15,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:15,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143307063] [2021-08-21 18:39:15,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143307063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:15,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981944020] [2021-08-21 18:39:15,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:39:15,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:15,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:15,976 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:15,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 18:39:20,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:39:20,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:20,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:39:20,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:20,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:20,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981944020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:20,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:20,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-08-21 18:39:20,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143268365] [2021-08-21 18:39:20,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:39:20,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:20,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:39:20,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:39:20,159 INFO L87 Difference]: Start difference. First operand 2483 states and 5817 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) [2021-08-21 18:39:20,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:20,293 INFO L93 Difference]: Finished difference Result 4128 states and 9279 transitions. [2021-08-21 18:39:20,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:39:20,293 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 [2021-08-21 18:39:20,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:20,299 INFO L225 Difference]: With dead ends: 4128 [2021-08-21 18:39:20,299 INFO L226 Difference]: Without dead ends: 4116 [2021-08-21 18:39:20,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:39:20,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4116 states. [2021-08-21 18:39:20,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4116 to 3624. [2021-08-21 18:39:20,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3624 states, 3623 states have (on average 2.32680099365167) internal successors, (8430), 3623 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:20,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3624 states to 3624 states and 8430 transitions. [2021-08-21 18:39:20,342 INFO L78 Accepts]: Start accepts. Automaton has 3624 states and 8430 transitions. Word has length 28 [2021-08-21 18:39:20,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:20,342 INFO L470 AbstractCegarLoop]: Abstraction has 3624 states and 8430 transitions. [2021-08-21 18:39:20,342 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) [2021-08-21 18:39:20,342 INFO L276 IsEmpty]: Start isEmpty. Operand 3624 states and 8430 transitions. [2021-08-21 18:39:20,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:20,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:20,346 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] [2021-08-21 18:39:20,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:20,546 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,SelfDestructingSolverStorable84 [2021-08-21 18:39:20,547 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:20,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:20,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1689517640, now seen corresponding path program 57 times [2021-08-21 18:39:20,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:20,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392482765] [2021-08-21 18:39:20,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:20,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:20,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:39:20,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:20,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392482765] [2021-08-21 18:39:20,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392482765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:20,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316071077] [2021-08-21 18:39:20,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:39:20,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:20,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:20,613 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:20,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 18:39:24,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:39:24,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:24,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:39:24,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:24,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:39:24,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316071077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:24,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:24,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-21 18:39:24,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552466825] [2021-08-21 18:39:24,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:39:24,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:24,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:39:24,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:39:24,846 INFO L87 Difference]: Start difference. First operand 3624 states and 8430 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) [2021-08-21 18:39:24,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:24,960 INFO L93 Difference]: Finished difference Result 4146 states and 9431 transitions. [2021-08-21 18:39:24,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:39:24,960 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 [2021-08-21 18:39:24,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:24,965 INFO L225 Difference]: With dead ends: 4146 [2021-08-21 18:39:24,965 INFO L226 Difference]: Without dead ends: 4146 [2021-08-21 18:39:24,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:39:24,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4146 states. [2021-08-21 18:39:25,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4146 to 3471. [2021-08-21 18:39:25,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3471 states, 3470 states have (on average 2.309798270893372) internal successors, (8015), 3470 states have internal predecessors, (8015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:25,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3471 states to 3471 states and 8015 transitions. [2021-08-21 18:39:25,009 INFO L78 Accepts]: Start accepts. Automaton has 3471 states and 8015 transitions. Word has length 28 [2021-08-21 18:39:25,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:25,009 INFO L470 AbstractCegarLoop]: Abstraction has 3471 states and 8015 transitions. [2021-08-21 18:39:25,009 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) [2021-08-21 18:39:25,009 INFO L276 IsEmpty]: Start isEmpty. Operand 3471 states and 8015 transitions. [2021-08-21 18:39:25,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:25,013 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:25,013 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] [2021-08-21 18:39:25,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:25,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:25,228 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:25,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:25,228 INFO L82 PathProgramCache]: Analyzing trace with hash 746070328, now seen corresponding path program 58 times [2021-08-21 18:39:25,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:25,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71259103] [2021-08-21 18:39:25,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:25,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:25,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:25,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71259103] [2021-08-21 18:39:25,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71259103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:25,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466810805] [2021-08-21 18:39:25,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:39:25,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:25,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:25,289 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:25,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 18:39:29,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:39:29,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:29,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:39:29,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:29,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466810805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:29,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:29,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-21 18:39:29,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972665801] [2021-08-21 18:39:29,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:39:29,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:29,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:39:29,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:39:29,534 INFO L87 Difference]: Start difference. First operand 3471 states and 8015 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) [2021-08-21 18:39:29,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:29,673 INFO L93 Difference]: Finished difference Result 3654 states and 8208 transitions. [2021-08-21 18:39:29,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:39:29,673 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 [2021-08-21 18:39:29,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:29,677 INFO L225 Difference]: With dead ends: 3654 [2021-08-21 18:39:29,677 INFO L226 Difference]: Without dead ends: 3654 [2021-08-21 18:39:29,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:39:29,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3654 states. [2021-08-21 18:39:29,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3654 to 3273. [2021-08-21 18:39:29,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3273 states, 3272 states have (on average 2.29859413202934) internal successors, (7521), 3272 states have internal predecessors, (7521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:29,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3273 states to 3273 states and 7521 transitions. [2021-08-21 18:39:29,714 INFO L78 Accepts]: Start accepts. Automaton has 3273 states and 7521 transitions. Word has length 28 [2021-08-21 18:39:29,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:29,714 INFO L470 AbstractCegarLoop]: Abstraction has 3273 states and 7521 transitions. [2021-08-21 18:39:29,714 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) [2021-08-21 18:39:29,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3273 states and 7521 transitions. [2021-08-21 18:39:29,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:29,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:29,718 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] [2021-08-21 18:39:29,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:29,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:29,918 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:29,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:29,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1943270792, now seen corresponding path program 59 times [2021-08-21 18:39:29,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:29,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486312294] [2021-08-21 18:39:29,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:29,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:39:29,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:29,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486312294] [2021-08-21 18:39:29,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486312294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:29,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055957472] [2021-08-21 18:39:29,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:39:29,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:29,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:29,971 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:29,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 18:39:34,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:39:34,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:34,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:39:34,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:39:34,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055957472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:34,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:34,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-21 18:39:34,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479402811] [2021-08-21 18:39:34,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:39:34,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:34,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:39:34,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:39:34,232 INFO L87 Difference]: Start difference. First operand 3273 states and 7521 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) [2021-08-21 18:39:34,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:34,317 INFO L93 Difference]: Finished difference Result 3393 states and 7765 transitions. [2021-08-21 18:39:34,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:39:34,318 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 [2021-08-21 18:39:34,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:34,322 INFO L225 Difference]: With dead ends: 3393 [2021-08-21 18:39:34,322 INFO L226 Difference]: Without dead ends: 3393 [2021-08-21 18:39:34,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:39:34,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3393 states. [2021-08-21 18:39:34,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3393 to 3233. [2021-08-21 18:39:34,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3233 states, 3232 states have (on average 2.2991955445544554) internal successors, (7431), 3232 states have internal predecessors, (7431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:34,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3233 states to 3233 states and 7431 transitions. [2021-08-21 18:39:34,380 INFO L78 Accepts]: Start accepts. Automaton has 3233 states and 7431 transitions. Word has length 28 [2021-08-21 18:39:34,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:34,380 INFO L470 AbstractCegarLoop]: Abstraction has 3233 states and 7431 transitions. [2021-08-21 18:39:34,380 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) [2021-08-21 18:39:34,380 INFO L276 IsEmpty]: Start isEmpty. Operand 3233 states and 7431 transitions. [2021-08-21 18:39:34,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:34,384 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:34,384 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] [2021-08-21 18:39:34,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:34,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-21 18:39:34,593 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:34,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:34,593 INFO L82 PathProgramCache]: Analyzing trace with hash -668128392, now seen corresponding path program 60 times [2021-08-21 18:39:34,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:34,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843647905] [2021-08-21 18:39:34,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:34,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:34,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:39:34,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:34,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843647905] [2021-08-21 18:39:34,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843647905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:34,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384891070] [2021-08-21 18:39:34,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:39:34,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:34,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:34,657 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:34,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 18:39:38,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:39:38,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:38,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:39:38,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:38,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:39:38,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384891070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:38,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:38,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-21 18:39:38,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107533154] [2021-08-21 18:39:38,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:39:38,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:38,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:39:38,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:39:38,948 INFO L87 Difference]: Start difference. First operand 3233 states and 7431 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) [2021-08-21 18:39:39,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:39,059 INFO L93 Difference]: Finished difference Result 3514 states and 8012 transitions. [2021-08-21 18:39:39,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:39:39,059 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 [2021-08-21 18:39:39,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:39,064 INFO L225 Difference]: With dead ends: 3514 [2021-08-21 18:39:39,064 INFO L226 Difference]: Without dead ends: 3514 [2021-08-21 18:39:39,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:39:39,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3514 states. [2021-08-21 18:39:39,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3514 to 3299. [2021-08-21 18:39:39,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3299 states, 3298 states have (on average 2.295027289266222) internal successors, (7569), 3298 states have internal predecessors, (7569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:39,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3299 states to 3299 states and 7569 transitions. [2021-08-21 18:39:39,101 INFO L78 Accepts]: Start accepts. Automaton has 3299 states and 7569 transitions. Word has length 28 [2021-08-21 18:39:39,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:39,101 INFO L470 AbstractCegarLoop]: Abstraction has 3299 states and 7569 transitions. [2021-08-21 18:39:39,101 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) [2021-08-21 18:39:39,101 INFO L276 IsEmpty]: Start isEmpty. Operand 3299 states and 7569 transitions. [2021-08-21 18:39:39,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:39,105 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:39,105 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] [2021-08-21 18:39:39,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:39,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:39,306 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:39,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:39,306 INFO L82 PathProgramCache]: Analyzing trace with hash 859737336, now seen corresponding path program 61 times [2021-08-21 18:39:39,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:39,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985934233] [2021-08-21 18:39:39,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:39,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:39,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:39,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985934233] [2021-08-21 18:39:39,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985934233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:39,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632803973] [2021-08-21 18:39:39,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:39:39,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:39,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:39,419 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:39,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 18:39:43,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:43,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:39:43,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:43,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632803973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:43,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:43,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-21 18:39:43,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549488659] [2021-08-21 18:39:43,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:39:43,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:43,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:39:43,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:39:43,741 INFO L87 Difference]: Start difference. First operand 3299 states and 7569 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) [2021-08-21 18:39:44,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:44,289 INFO L93 Difference]: Finished difference Result 8762 states and 18221 transitions. [2021-08-21 18:39:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 18:39:44,289 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 [2021-08-21 18:39:44,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:44,300 INFO L225 Difference]: With dead ends: 8762 [2021-08-21 18:39:44,301 INFO L226 Difference]: Without dead ends: 8762 [2021-08-21 18:39:44,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 384.4ms TimeCoverageRelationStatistics Valid=638, Invalid=1912, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:39:44,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8762 states. [2021-08-21 18:39:44,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8762 to 4495. [2021-08-21 18:39:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4495 states, 4494 states have (on average 2.314419225634179) internal successors, (10401), 4494 states have internal predecessors, (10401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:44,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4495 states to 4495 states and 10401 transitions. [2021-08-21 18:39:44,385 INFO L78 Accepts]: Start accepts. Automaton has 4495 states and 10401 transitions. Word has length 28 [2021-08-21 18:39:44,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:44,385 INFO L470 AbstractCegarLoop]: Abstraction has 4495 states and 10401 transitions. [2021-08-21 18:39:44,385 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) [2021-08-21 18:39:44,385 INFO L276 IsEmpty]: Start isEmpty. Operand 4495 states and 10401 transitions. [2021-08-21 18:39:44,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:44,390 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:44,390 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] [2021-08-21 18:39:44,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:44,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:44,590 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:44,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:44,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1117559800, now seen corresponding path program 62 times [2021-08-21 18:39:44,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:44,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868744420] [2021-08-21 18:39:44,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:44,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:44,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:44,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868744420] [2021-08-21 18:39:44,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868744420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:44,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717146607] [2021-08-21 18:39:44,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:39:44,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:44,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:44,655 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:44,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 18:39:48,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:39:48,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:48,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:39:48,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:48,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:48,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717146607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:48,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:48,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-21 18:39:48,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436286843] [2021-08-21 18:39:48,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:39:48,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:48,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:39:48,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:39:48,973 INFO L87 Difference]: Start difference. First operand 4495 states and 10401 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) [2021-08-21 18:39:49,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:49,108 INFO L93 Difference]: Finished difference Result 5609 states and 12730 transitions. [2021-08-21 18:39:49,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:39:49,108 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 [2021-08-21 18:39:49,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:49,114 INFO L225 Difference]: With dead ends: 5609 [2021-08-21 18:39:49,114 INFO L226 Difference]: Without dead ends: 5605 [2021-08-21 18:39:49,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:39:49,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5605 states. [2021-08-21 18:39:49,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5605 to 5460. [2021-08-21 18:39:49,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5460 states, 5459 states have (on average 2.2985894852537094) internal successors, (12548), 5459 states have internal predecessors, (12548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:49,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5460 states to 5460 states and 12548 transitions. [2021-08-21 18:39:49,174 INFO L78 Accepts]: Start accepts. Automaton has 5460 states and 12548 transitions. Word has length 28 [2021-08-21 18:39:49,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:49,174 INFO L470 AbstractCegarLoop]: Abstraction has 5460 states and 12548 transitions. [2021-08-21 18:39:49,174 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) [2021-08-21 18:39:49,174 INFO L276 IsEmpty]: Start isEmpty. Operand 5460 states and 12548 transitions. [2021-08-21 18:39:49,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:49,197 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:49,197 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] [2021-08-21 18:39:49,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:49,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:49,397 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:49,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:49,398 INFO L82 PathProgramCache]: Analyzing trace with hash -454824968, now seen corresponding path program 63 times [2021-08-21 18:39:49,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:49,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10375598] [2021-08-21 18:39:49,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:49,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:49,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:49,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:49,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10375598] [2021-08-21 18:39:49,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10375598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:49,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375620559] [2021-08-21 18:39:49,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:39:49,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:49,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:49,470 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:49,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 18:39:53,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:39:53,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:53,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:39:53,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:53,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375620559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:53,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:53,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-21 18:39:53,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846713073] [2021-08-21 18:39:53,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:39:53,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:53,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:39:53,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:39:53,786 INFO L87 Difference]: Start difference. First operand 5460 states and 12548 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) [2021-08-21 18:39:53,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:53,967 INFO L93 Difference]: Finished difference Result 5616 states and 12756 transitions. [2021-08-21 18:39:53,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:39:53,968 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 [2021-08-21 18:39:53,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:53,974 INFO L225 Difference]: With dead ends: 5616 [2021-08-21 18:39:53,974 INFO L226 Difference]: Without dead ends: 5616 [2021-08-21 18:39:53,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:39:53,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5616 states. [2021-08-21 18:39:54,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5616 to 5420. [2021-08-21 18:39:54,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5420 states, 5419 states have (on average 2.2963646429230486) internal successors, (12444), 5419 states have internal predecessors, (12444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:54,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5420 states to 5420 states and 12444 transitions. [2021-08-21 18:39:54,035 INFO L78 Accepts]: Start accepts. Automaton has 5420 states and 12444 transitions. Word has length 28 [2021-08-21 18:39:54,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:54,036 INFO L470 AbstractCegarLoop]: Abstraction has 5420 states and 12444 transitions. [2021-08-21 18:39:54,036 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) [2021-08-21 18:39:54,036 INFO L276 IsEmpty]: Start isEmpty. Operand 5420 states and 12444 transitions. [2021-08-21 18:39:54,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:54,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:54,041 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:54,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:54,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-08-21 18:39:54,242 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:54,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:54,242 INFO L82 PathProgramCache]: Analyzing trace with hash -812677188, now seen corresponding path program 64 times [2021-08-21 18:39:54,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:54,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436507268] [2021-08-21 18:39:54,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:54,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:39:54,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:54,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436507268] [2021-08-21 18:39:54,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436507268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:54,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854154727] [2021-08-21 18:39:54,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:39:54,301 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:54,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:54,301 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:54,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 18:39:58,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:39:58,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:58,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:39:58,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:39:58,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854154727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:58,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:58,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-21 18:39:58,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548725503] [2021-08-21 18:39:58,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:39:58,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:58,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:39:58,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:39:58,626 INFO L87 Difference]: Start difference. First operand 5420 states and 12444 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) [2021-08-21 18:39:58,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:58,817 INFO L93 Difference]: Finished difference Result 5616 states and 12831 transitions. [2021-08-21 18:39:58,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:39:58,817 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 [2021-08-21 18:39:58,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:58,824 INFO L225 Difference]: With dead ends: 5616 [2021-08-21 18:39:58,824 INFO L226 Difference]: Without dead ends: 5616 [2021-08-21 18:39:58,824 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:39:58,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5616 states. [2021-08-21 18:39:58,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5616 to 5519. [2021-08-21 18:39:58,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5519 states, 5518 states have (on average 2.293947082276187) internal successors, (12658), 5518 states have internal predecessors, (12658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:58,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5519 states to 5519 states and 12658 transitions. [2021-08-21 18:39:58,887 INFO L78 Accepts]: Start accepts. Automaton has 5519 states and 12658 transitions. Word has length 28 [2021-08-21 18:39:58,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:58,887 INFO L470 AbstractCegarLoop]: Abstraction has 5519 states and 12658 transitions. [2021-08-21 18:39:58,887 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) [2021-08-21 18:39:58,887 INFO L276 IsEmpty]: Start isEmpty. Operand 5519 states and 12658 transitions. [2021-08-21 18:39:58,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:58,893 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:58,893 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] [2021-08-21 18:39:58,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:59,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:59,094 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:59,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:59,094 INFO L82 PathProgramCache]: Analyzing trace with hash -12851524, now seen corresponding path program 65 times [2021-08-21 18:39:59,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:59,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97762062] [2021-08-21 18:39:59,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:59,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:59,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:59,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:59,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97762062] [2021-08-21 18:39:59,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97762062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:59,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959763995] [2021-08-21 18:39:59,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:39:59,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:59,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:59,160 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:59,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 18:40:03,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:40:03,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:03,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:40:03,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:03,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:03,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959763995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:03,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:03,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-08-21 18:40:03,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556634308] [2021-08-21 18:40:03,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:40:03,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:03,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:40:03,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:40:03,732 INFO L87 Difference]: Start difference. First operand 5519 states and 12658 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) [2021-08-21 18:40:03,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:03,967 INFO L93 Difference]: Finished difference Result 5780 states and 13188 transitions. [2021-08-21 18:40:03,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:40:03,968 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 [2021-08-21 18:40:03,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:03,974 INFO L225 Difference]: With dead ends: 5780 [2021-08-21 18:40:03,974 INFO L226 Difference]: Without dead ends: 5780 [2021-08-21 18:40:03,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:40:03,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5780 states. [2021-08-21 18:40:04,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5780 to 5563. [2021-08-21 18:40:04,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5563 states, 5562 states have (on average 2.293060050341604) internal successors, (12754), 5562 states have internal predecessors, (12754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5563 states to 5563 states and 12754 transitions. [2021-08-21 18:40:04,037 INFO L78 Accepts]: Start accepts. Automaton has 5563 states and 12754 transitions. Word has length 28 [2021-08-21 18:40:04,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:04,037 INFO L470 AbstractCegarLoop]: Abstraction has 5563 states and 12754 transitions. [2021-08-21 18:40:04,037 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) [2021-08-21 18:40:04,037 INFO L276 IsEmpty]: Start isEmpty. Operand 5563 states and 12754 transitions. [2021-08-21 18:40:04,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:04,043 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:04,043 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] [2021-08-21 18:40:04,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-21 18:40:04,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:04,244 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:04,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:04,244 INFO L82 PathProgramCache]: Analyzing trace with hash 97899188, now seen corresponding path program 27 times [2021-08-21 18:40:04,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:04,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494224404] [2021-08-21 18:40:04,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:04,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:04,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:04,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494224404] [2021-08-21 18:40:04,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494224404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:04,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674932635] [2021-08-21 18:40:04,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:40:04,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:04,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:04,310 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:04,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 18:40:08,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:40:08,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:08,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:40:08,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:08,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674932635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:08,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:08,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 18:40:08,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915501948] [2021-08-21 18:40:08,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:40:08,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:08,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:40:08,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:40:08,738 INFO L87 Difference]: Start difference. First operand 5563 states and 12754 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) [2021-08-21 18:40:08,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:08,992 INFO L93 Difference]: Finished difference Result 8438 states and 18768 transitions. [2021-08-21 18:40:08,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:40:08,992 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 [2021-08-21 18:40:08,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:09,003 INFO L225 Difference]: With dead ends: 8438 [2021-08-21 18:40:09,003 INFO L226 Difference]: Without dead ends: 8414 [2021-08-21 18:40:09,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:40:09,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8414 states. [2021-08-21 18:40:09,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8414 to 5481. [2021-08-21 18:40:09,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5481 states, 5480 states have (on average 2.2910583941605838) internal successors, (12555), 5480 states have internal predecessors, (12555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:09,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 12555 transitions. [2021-08-21 18:40:09,082 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 12555 transitions. Word has length 28 [2021-08-21 18:40:09,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:09,082 INFO L470 AbstractCegarLoop]: Abstraction has 5481 states and 12555 transitions. [2021-08-21 18:40:09,082 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) [2021-08-21 18:40:09,082 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 12555 transitions. [2021-08-21 18:40:09,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:09,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:09,088 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] [2021-08-21 18:40:09,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:09,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:09,302 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:09,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:09,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1025606664, now seen corresponding path program 66 times [2021-08-21 18:40:09,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:09,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48461154] [2021-08-21 18:40:09,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:09,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:09,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:09,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48461154] [2021-08-21 18:40:09,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48461154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:09,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884501844] [2021-08-21 18:40:09,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:40:09,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:09,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:09,370 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:09,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 18:40:13,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:40:13,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:13,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:40:13,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:13,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884501844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:13,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:13,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-21 18:40:13,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734856010] [2021-08-21 18:40:13,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:40:13,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:13,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:40:13,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:40:13,770 INFO L87 Difference]: Start difference. First operand 5481 states and 12555 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) [2021-08-21 18:40:13,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:13,949 INFO L93 Difference]: Finished difference Result 6658 states and 14924 transitions. [2021-08-21 18:40:13,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:40:13,949 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 [2021-08-21 18:40:13,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:13,957 INFO L225 Difference]: With dead ends: 6658 [2021-08-21 18:40:13,958 INFO L226 Difference]: Without dead ends: 6654 [2021-08-21 18:40:13,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:40:13,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6654 states. [2021-08-21 18:40:14,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6654 to 6438. [2021-08-21 18:40:14,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6438 states, 6437 states have (on average 2.281186888302004) internal successors, (14684), 6437 states have internal predecessors, (14684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:14,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6438 states to 6438 states and 14684 transitions. [2021-08-21 18:40:14,038 INFO L78 Accepts]: Start accepts. Automaton has 6438 states and 14684 transitions. Word has length 28 [2021-08-21 18:40:14,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:14,038 INFO L470 AbstractCegarLoop]: Abstraction has 6438 states and 14684 transitions. [2021-08-21 18:40:14,038 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) [2021-08-21 18:40:14,038 INFO L276 IsEmpty]: Start isEmpty. Operand 6438 states and 14684 transitions. [2021-08-21 18:40:14,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:14,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:14,044 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] [2021-08-21 18:40:14,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:14,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:14,261 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:14,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:14,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1339123644, now seen corresponding path program 67 times [2021-08-21 18:40:14,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:14,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805406333] [2021-08-21 18:40:14,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:14,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:14,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:14,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805406333] [2021-08-21 18:40:14,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805406333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:14,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325967039] [2021-08-21 18:40:14,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:40:14,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:14,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:14,326 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:14,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 18:40:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:18,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:40:18,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:18,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:18,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325967039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:18,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:18,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-21 18:40:18,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207106860] [2021-08-21 18:40:18,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:40:18,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:18,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:40:18,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:40:18,740 INFO L87 Difference]: Start difference. First operand 6438 states and 14684 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) [2021-08-21 18:40:18,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:18,979 INFO L93 Difference]: Finished difference Result 6625 states and 15037 transitions. [2021-08-21 18:40:18,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:40:18,980 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 [2021-08-21 18:40:18,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:18,988 INFO L225 Difference]: With dead ends: 6625 [2021-08-21 18:40:18,988 INFO L226 Difference]: Without dead ends: 6625 [2021-08-21 18:40:18,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 180.6ms TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:40:18,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6625 states. [2021-08-21 18:40:19,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6625 to 6479. [2021-08-21 18:40:19,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6479 states, 6478 states have (on average 2.2792528558196974) internal successors, (14765), 6478 states have internal predecessors, (14765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:19,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6479 states to 6479 states and 14765 transitions. [2021-08-21 18:40:19,067 INFO L78 Accepts]: Start accepts. Automaton has 6479 states and 14765 transitions. Word has length 28 [2021-08-21 18:40:19,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:19,067 INFO L470 AbstractCegarLoop]: Abstraction has 6479 states and 14765 transitions. [2021-08-21 18:40:19,067 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) [2021-08-21 18:40:19,068 INFO L276 IsEmpty]: Start isEmpty. Operand 6479 states and 14765 transitions. [2021-08-21 18:40:19,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:19,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:19,075 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] [2021-08-21 18:40:19,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:19,275 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,SelfDestructingSolverStorable96 [2021-08-21 18:40:19,276 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:19,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:19,276 INFO L82 PathProgramCache]: Analyzing trace with hash 2138949308, now seen corresponding path program 68 times [2021-08-21 18:40:19,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:19,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841697542] [2021-08-21 18:40:19,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:19,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:19,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:19,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841697542] [2021-08-21 18:40:19,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841697542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:19,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629802169] [2021-08-21 18:40:19,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:40:19,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:19,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:19,346 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:19,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 18:40:23,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:40:23,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:23,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:40:23,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:23,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629802169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:23,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:23,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-21 18:40:23,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869525647] [2021-08-21 18:40:23,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:40:23,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:23,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:40:23,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:40:23,777 INFO L87 Difference]: Start difference. First operand 6479 states and 14765 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) [2021-08-21 18:40:23,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:23,995 INFO L93 Difference]: Finished difference Result 6672 states and 15151 transitions. [2021-08-21 18:40:23,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:40:23,995 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 [2021-08-21 18:40:23,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:24,003 INFO L225 Difference]: With dead ends: 6672 [2021-08-21 18:40:24,004 INFO L226 Difference]: Without dead ends: 6672 [2021-08-21 18:40:24,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:40:24,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6672 states. [2021-08-21 18:40:24,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6672 to 6479. [2021-08-21 18:40:24,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6479 states, 6478 states have (on average 2.2792528558196974) internal successors, (14765), 6478 states have internal predecessors, (14765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:24,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6479 states to 6479 states and 14765 transitions. [2021-08-21 18:40:24,080 INFO L78 Accepts]: Start accepts. Automaton has 6479 states and 14765 transitions. Word has length 28 [2021-08-21 18:40:24,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:24,081 INFO L470 AbstractCegarLoop]: Abstraction has 6479 states and 14765 transitions. [2021-08-21 18:40:24,081 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) [2021-08-21 18:40:24,081 INFO L276 IsEmpty]: Start isEmpty. Operand 6479 states and 14765 transitions. [2021-08-21 18:40:24,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:24,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:24,087 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] [2021-08-21 18:40:24,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-21 18:40:24,287 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,SelfDestructingSolverStorable97 [2021-08-21 18:40:24,288 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:24,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:24,288 INFO L82 PathProgramCache]: Analyzing trace with hash -424171844, now seen corresponding path program 69 times [2021-08-21 18:40:24,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:24,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738940496] [2021-08-21 18:40:24,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:24,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:24,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:24,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738940496] [2021-08-21 18:40:24,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738940496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:24,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533928426] [2021-08-21 18:40:24,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:40:24,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:24,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:24,364 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:24,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 18:40:28,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:40:28,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:28,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:40:28,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:28,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533928426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:28,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:28,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-21 18:40:28,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397408270] [2021-08-21 18:40:28,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:40:28,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:28,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:40:28,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:40:28,774 INFO L87 Difference]: Start difference. First operand 6479 states and 14765 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) [2021-08-21 18:40:29,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:29,051 INFO L93 Difference]: Finished difference Result 6850 states and 15518 transitions. [2021-08-21 18:40:29,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:40:29,052 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 [2021-08-21 18:40:29,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:29,061 INFO L225 Difference]: With dead ends: 6850 [2021-08-21 18:40:29,061 INFO L226 Difference]: Without dead ends: 6850 [2021-08-21 18:40:29,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:40:29,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6850 states. [2021-08-21 18:40:29,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6850 to 6475. [2021-08-21 18:40:29,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6475 states, 6474 states have (on average 2.2791164658634537) internal successors, (14755), 6474 states have internal predecessors, (14755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:29,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6475 states to 6475 states and 14755 transitions. [2021-08-21 18:40:29,143 INFO L78 Accepts]: Start accepts. Automaton has 6475 states and 14755 transitions. Word has length 28 [2021-08-21 18:40:29,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:29,143 INFO L470 AbstractCegarLoop]: Abstraction has 6475 states and 14755 transitions. [2021-08-21 18:40:29,144 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) [2021-08-21 18:40:29,144 INFO L276 IsEmpty]: Start isEmpty. Operand 6475 states and 14755 transitions. [2021-08-21 18:40:29,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:40:29,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:29,150 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] [2021-08-21 18:40:29,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-21 18:40:29,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:29,360 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:29,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:29,360 INFO L82 PathProgramCache]: Analyzing trace with hash -510371878, now seen corresponding path program 70 times [2021-08-21 18:40:29,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:29,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464000585] [2021-08-21 18:40:29,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:29,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:30,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:30,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464000585] [2021-08-21 18:40:30,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464000585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:30,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831086137] [2021-08-21 18:40:30,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:40:30,317 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:30,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:30,318 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:30,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 18:40:34,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:40:34,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:34,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:40:34,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:38,969 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-21 18:40:38,969 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 237 treesize of output 154 [2021-08-21 18:40:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:39,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831086137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:39,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:39,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:40:39,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867316095] [2021-08-21 18:40:39,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:40:39,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:39,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:40:39,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:40:39,669 INFO L87 Difference]: Start difference. First operand 6475 states and 14755 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:43,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:43,535 INFO L93 Difference]: Finished difference Result 7461 states and 16549 transitions. [2021-08-21 18:40:43,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:40:43,536 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:40:43,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:43,545 INFO L225 Difference]: With dead ends: 7461 [2021-08-21 18:40:43,545 INFO L226 Difference]: Without dead ends: 7441 [2021-08-21 18:40:43,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 3990.9ms TimeCoverageRelationStatistics Valid=372, Invalid=1608, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:40:43,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7441 states. [2021-08-21 18:40:43,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7441 to 6598. [2021-08-21 18:40:43,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6598 states, 6597 states have (on average 2.2817947551917537) internal successors, (15053), 6597 states have internal predecessors, (15053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:43,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6598 states to 6598 states and 15053 transitions. [2021-08-21 18:40:43,625 INFO L78 Accepts]: Start accepts. Automaton has 6598 states and 15053 transitions. Word has length 30 [2021-08-21 18:40:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:43,625 INFO L470 AbstractCegarLoop]: Abstraction has 6598 states and 15053 transitions. [2021-08-21 18:40:43,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:43,625 INFO L276 IsEmpty]: Start isEmpty. Operand 6598 states and 15053 transitions. [2021-08-21 18:40:43,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:40:43,631 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:43,631 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] [2021-08-21 18:40:43,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-21 18:40:43,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:43,832 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:43,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:43,832 INFO L82 PathProgramCache]: Analyzing trace with hash -256582754, now seen corresponding path program 71 times [2021-08-21 18:40:43,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:43,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870514949] [2021-08-21 18:40:43,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:43,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:45,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:45,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870514949] [2021-08-21 18:40:45,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870514949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:45,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719300773] [2021-08-21 18:40:45,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:40:45,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:45,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:45,194 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:45,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 18:40:49,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:40:49,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:49,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 18:40:49,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:54,749 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-21 18:40:54,749 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 220 treesize of output 147 [2021-08-21 18:40:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:55,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719300773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:55,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:55,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-21 18:40:55,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904823642] [2021-08-21 18:40:55,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:40:55,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:55,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:40:55,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:40:55,638 INFO L87 Difference]: Start difference. First operand 6598 states and 15053 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:00,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:00,551 INFO L93 Difference]: Finished difference Result 7183 states and 16079 transitions. [2021-08-21 18:41:00,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:41:00,551 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:41:00,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:00,560 INFO L225 Difference]: With dead ends: 7183 [2021-08-21 18:41:00,560 INFO L226 Difference]: Without dead ends: 7163 [2021-08-21 18:41:00,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 5041.2ms TimeCoverageRelationStatistics Valid=369, Invalid=2181, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:41:00,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7163 states. [2021-08-21 18:41:00,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7163 to 6620. [2021-08-21 18:41:00,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6620 states, 6619 states have (on average 2.282973258800423) internal successors, (15111), 6619 states have internal predecessors, (15111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6620 states to 6620 states and 15111 transitions. [2021-08-21 18:41:00,639 INFO L78 Accepts]: Start accepts. Automaton has 6620 states and 15111 transitions. Word has length 30 [2021-08-21 18:41:00,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:00,639 INFO L470 AbstractCegarLoop]: Abstraction has 6620 states and 15111 transitions. [2021-08-21 18:41:00,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:00,639 INFO L276 IsEmpty]: Start isEmpty. Operand 6620 states and 15111 transitions. [2021-08-21 18:41:00,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:41:00,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:00,647 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] [2021-08-21 18:41:00,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-21 18:41:00,855 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,SelfDestructingSolverStorable100 [2021-08-21 18:41:00,855 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:00,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:00,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1934847834, now seen corresponding path program 72 times [2021-08-21 18:41:00,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:00,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218994343] [2021-08-21 18:41:00,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:00,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:03,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:03,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218994343] [2021-08-21 18:41:03,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218994343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:03,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770340771] [2021-08-21 18:41:03,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:41:03,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:03,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:03,397 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:03,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 18:41:08,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:41:08,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:08,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:41:08,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:10,224 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-21 18:41:10,224 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 221 treesize of output 145 [2021-08-21 18:41:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:10,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770340771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:10,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:10,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 18:41:10,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341603800] [2021-08-21 18:41:10,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:41:10,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:10,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:41:10,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:41:10,730 INFO L87 Difference]: Start difference. First operand 6620 states and 15111 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:19,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:19,097 INFO L93 Difference]: Finished difference Result 7311 states and 16268 transitions. [2021-08-21 18:41:19,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 18:41:19,097 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:41:19,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:19,107 INFO L225 Difference]: With dead ends: 7311 [2021-08-21 18:41:19,107 INFO L226 Difference]: Without dead ends: 7301 [2021-08-21 18:41:19,108 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 8659.2ms TimeCoverageRelationStatistics Valid=393, Invalid=3029, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:41:19,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7301 states. [2021-08-21 18:41:19,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7301 to 6634. [2021-08-21 18:41:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6634 states, 6633 states have (on average 2.283883612241821) internal successors, (15149), 6633 states have internal predecessors, (15149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:19,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6634 states to 6634 states and 15149 transitions. [2021-08-21 18:41:19,192 INFO L78 Accepts]: Start accepts. Automaton has 6634 states and 15149 transitions. Word has length 30 [2021-08-21 18:41:19,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:19,192 INFO L470 AbstractCegarLoop]: Abstraction has 6634 states and 15149 transitions. [2021-08-21 18:41:19,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:19,192 INFO L276 IsEmpty]: Start isEmpty. Operand 6634 states and 15149 transitions. [2021-08-21 18:41:19,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:41:19,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:19,200 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] [2021-08-21 18:41:19,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-21 18:41:19,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:19,401 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:19,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:19,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1019744218, now seen corresponding path program 73 times [2021-08-21 18:41:19,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:19,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363011883] [2021-08-21 18:41:19,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:19,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:20,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:20,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363011883] [2021-08-21 18:41:20,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363011883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:20,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334756313] [2021-08-21 18:41:20,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:41:20,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:20,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:20,341 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:20,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 18:41:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:25,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:41:25,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:30,364 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-21 18:41:30,365 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 218 treesize of output 145 [2021-08-21 18:41:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:31,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334756313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:31,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:31,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:41:31,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741489976] [2021-08-21 18:41:31,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:41:31,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:31,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:41:31,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:41:31,100 INFO L87 Difference]: Start difference. First operand 6634 states and 15149 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:34,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:34,246 INFO L93 Difference]: Finished difference Result 8695 states and 19615 transitions. [2021-08-21 18:41:34,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:41:34,246 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:41:34,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:34,258 INFO L225 Difference]: With dead ends: 8695 [2021-08-21 18:41:34,258 INFO L226 Difference]: Without dead ends: 8680 [2021-08-21 18:41:34,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 2926.8ms TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 18:41:34,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8680 states. [2021-08-21 18:41:34,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8680 to 6674. [2021-08-21 18:41:34,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6674 states, 6673 states have (on average 2.2839802187921476) internal successors, (15241), 6673 states have internal predecessors, (15241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:34,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6674 states to 6674 states and 15241 transitions. [2021-08-21 18:41:34,350 INFO L78 Accepts]: Start accepts. Automaton has 6674 states and 15241 transitions. Word has length 30 [2021-08-21 18:41:34,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:34,350 INFO L470 AbstractCegarLoop]: Abstraction has 6674 states and 15241 transitions. [2021-08-21 18:41:34,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:34,350 INFO L276 IsEmpty]: Start isEmpty. Operand 6674 states and 15241 transitions. [2021-08-21 18:41:34,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:41:34,358 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:34,358 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] [2021-08-21 18:41:34,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-21 18:41:34,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-21 18:41:34,558 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:34,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:34,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1094509922, now seen corresponding path program 74 times [2021-08-21 18:41:34,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:34,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790971372] [2021-08-21 18:41:34,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:34,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:35,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:35,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790971372] [2021-08-21 18:41:35,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790971372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:35,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058321777] [2021-08-21 18:41:35,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:41:35,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:35,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:35,830 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:35,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 18:41:40,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:41:40,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:40,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:41:40,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:44,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:41:44,258 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 227 treesize of output 191 [2021-08-21 18:41:50,045 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:50,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058321777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:50,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:50,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-21 18:41:50,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344530832] [2021-08-21 18:41:50,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:41:50,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:50,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:41:50,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:41:50,046 INFO L87 Difference]: Start difference. First operand 6674 states and 15241 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:52,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:52,967 INFO L93 Difference]: Finished difference Result 6798 states and 15409 transitions. [2021-08-21 18:41:52,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:41:52,967 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:41:52,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:52,975 INFO L225 Difference]: With dead ends: 6798 [2021-08-21 18:41:52,976 INFO L226 Difference]: Without dead ends: 6793 [2021-08-21 18:41:52,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 2957.3ms TimeCoverageRelationStatistics Valid=228, Invalid=1494, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:41:52,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6793 states. [2021-08-21 18:41:53,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6793 to 6682. [2021-08-21 18:41:53,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6682 states, 6681 states have (on average 2.283340817242928) internal successors, (15255), 6681 states have internal predecessors, (15255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:53,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6682 states to 6682 states and 15255 transitions. [2021-08-21 18:41:53,068 INFO L78 Accepts]: Start accepts. Automaton has 6682 states and 15255 transitions. Word has length 30 [2021-08-21 18:41:53,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:53,069 INFO L470 AbstractCegarLoop]: Abstraction has 6682 states and 15255 transitions. [2021-08-21 18:41:53,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:53,069 INFO L276 IsEmpty]: Start isEmpty. Operand 6682 states and 15255 transitions. [2021-08-21 18:41:53,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:41:53,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:53,075 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] [2021-08-21 18:41:53,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-21 18:41:53,276 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,SelfDestructingSolverStorable103 [2021-08-21 18:41:53,276 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:53,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:53,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1013060126, now seen corresponding path program 75 times [2021-08-21 18:41:53,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:53,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71310838] [2021-08-21 18:41:53,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:53,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:54,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:54,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71310838] [2021-08-21 18:41:54,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71310838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:54,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033664290] [2021-08-21 18:41:54,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:41:54,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:54,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:54,487 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:54,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 18:41:59,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:41:59,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:59,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 18:41:59,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:01,870 INFO L354 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2021-08-21 18:42:01,871 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 223 treesize of output 181 [2021-08-21 18:42:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:08,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033664290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:08,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:08,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 18:42:08,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992756818] [2021-08-21 18:42:08,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:42:08,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:08,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:42:08,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:42:08,577 INFO L87 Difference]: Start difference. First operand 6682 states and 15255 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:16,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:16,794 INFO L93 Difference]: Finished difference Result 7398 states and 16447 transitions. [2021-08-21 18:42:16,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 18:42:16,795 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:42:16,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:16,805 INFO L225 Difference]: With dead ends: 7398 [2021-08-21 18:42:16,805 INFO L226 Difference]: Without dead ends: 7388 [2021-08-21 18:42:16,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 8459.5ms TimeCoverageRelationStatistics Valid=452, Invalid=3330, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:42:16,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7388 states. [2021-08-21 18:42:16,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7388 to 6697. [2021-08-21 18:42:16,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6697 states, 6696 states have (on average 2.2830047789725207) internal successors, (15287), 6696 states have internal predecessors, (15287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:16,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6697 states to 6697 states and 15287 transitions. [2021-08-21 18:42:16,889 INFO L78 Accepts]: Start accepts. Automaton has 6697 states and 15287 transitions. Word has length 30 [2021-08-21 18:42:16,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:16,890 INFO L470 AbstractCegarLoop]: Abstraction has 6697 states and 15287 transitions. [2021-08-21 18:42:16,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:16,890 INFO L276 IsEmpty]: Start isEmpty. Operand 6697 states and 15287 transitions. [2021-08-21 18:42:16,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:42:16,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:16,898 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] [2021-08-21 18:42:16,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-21 18:42:17,098 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,SelfDestructingSolverStorable104 [2021-08-21 18:42:17,098 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:17,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:17,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1266849250, now seen corresponding path program 76 times [2021-08-21 18:42:17,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:17,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682605781] [2021-08-21 18:42:17,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:17,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:18,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:18,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682605781] [2021-08-21 18:42:18,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682605781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:18,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331378219] [2021-08-21 18:42:18,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:42:18,531 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:18,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:18,532 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:42:18,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 18:42:23,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:42:23,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:42:23,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:42:23,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:31,110 INFO L354 Elim1Store]: treesize reduction 66, result has 9.6 percent of original size [2021-08-21 18:42:31,110 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 244 treesize of output 164 [2021-08-21 18:42:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:31,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331378219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:31,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:31,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 18:42:31,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935777798] [2021-08-21 18:42:31,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:42:31,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:31,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:42:31,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:42:31,775 INFO L87 Difference]: Start difference. First operand 6697 states and 15287 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:38,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:38,905 INFO L93 Difference]: Finished difference Result 8690 states and 19660 transitions. [2021-08-21 18:42:38,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 18:42:38,905 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:42:38,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:38,915 INFO L225 Difference]: With dead ends: 8690 [2021-08-21 18:42:38,915 INFO L226 Difference]: Without dead ends: 8680 [2021-08-21 18:42:38,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 7141.5ms TimeCoverageRelationStatistics Valid=532, Invalid=3628, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 18:42:38,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8680 states. [2021-08-21 18:42:38,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8680 to 6721. [2021-08-21 18:42:38,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6721 states, 6720 states have (on average 2.2819940476190474) internal successors, (15335), 6720 states have internal predecessors, (15335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:38,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6721 states to 6721 states and 15335 transitions. [2021-08-21 18:42:38,999 INFO L78 Accepts]: Start accepts. Automaton has 6721 states and 15335 transitions. Word has length 30 [2021-08-21 18:42:38,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:38,999 INFO L470 AbstractCegarLoop]: Abstraction has 6721 states and 15335 transitions. [2021-08-21 18:42:38,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:38,999 INFO L276 IsEmpty]: Start isEmpty. Operand 6721 states and 15335 transitions. [2021-08-21 18:42:39,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:42:39,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:39,006 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] [2021-08-21 18:42:39,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-21 18:42:39,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:39,207 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:39,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:39,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1851087142, now seen corresponding path program 28 times [2021-08-21 18:42:39,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:39,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033410237] [2021-08-21 18:42:39,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:39,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:40,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:40,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:40,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033410237] [2021-08-21 18:42:40,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033410237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:40,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92638151] [2021-08-21 18:42:40,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:42:40,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:40,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:40,781 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:42:40,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 18:42:46,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:42:46,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:42:46,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 18:42:46,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:48,384 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-21 18:42:48,384 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 256 treesize of output 157 [2021-08-21 18:42:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:48,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92638151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:48,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:48,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-08-21 18:42:48,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496998106] [2021-08-21 18:42:48,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:42:48,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:48,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:42:48,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:42:48,710 INFO L87 Difference]: Start difference. First operand 6721 states and 15335 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) [2021-08-21 18:42:55,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:55,331 INFO L93 Difference]: Finished difference Result 6765 states and 15389 transitions. [2021-08-21 18:42:55,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:42:55,331 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 [2021-08-21 18:42:55,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:55,341 INFO L225 Difference]: With dead ends: 6765 [2021-08-21 18:42:55,341 INFO L226 Difference]: Without dead ends: 6760 [2021-08-21 18:42:55,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 7112.7ms TimeCoverageRelationStatistics Valid=417, Invalid=2339, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 18:42:55,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6760 states. [2021-08-21 18:42:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6760 to 6725. [2021-08-21 18:42:55,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6725 states, 6724 states have (on average 2.2813801308744797) internal successors, (15340), 6724 states have internal predecessors, (15340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:55,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6725 states to 6725 states and 15340 transitions. [2021-08-21 18:42:55,421 INFO L78 Accepts]: Start accepts. Automaton has 6725 states and 15340 transitions. Word has length 30 [2021-08-21 18:42:55,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:55,421 INFO L470 AbstractCegarLoop]: Abstraction has 6725 states and 15340 transitions. [2021-08-21 18:42:55,421 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) [2021-08-21 18:42:55,421 INFO L276 IsEmpty]: Start isEmpty. Operand 6725 states and 15340 transitions. [2021-08-21 18:42:55,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:42:55,429 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:55,429 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] [2021-08-21 18:42:55,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-21 18:42:55,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:55,629 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:55,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:55,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1647853274, now seen corresponding path program 29 times [2021-08-21 18:42:55,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:55,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341227549] [2021-08-21 18:42:55,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:55,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:57,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:57,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341227549] [2021-08-21 18:42:57,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341227549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:57,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890740420] [2021-08-21 18:42:57,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:42:57,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:57,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:57,092 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:42:57,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 18:43:02,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:43:02,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:43:02,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 18:43:02,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:43:04,944 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-21 18:43:04,944 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 256 treesize of output 157 [2021-08-21 18:43:05,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:05,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890740420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:05,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:43:05,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 18:43:05,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055058980] [2021-08-21 18:43:05,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:43:05,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:43:05,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:43:05,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:43:05,240 INFO L87 Difference]: Start difference. First operand 6725 states and 15340 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:14,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:43:14,664 INFO L93 Difference]: Finished difference Result 6822 states and 15468 transitions. [2021-08-21 18:43:14,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 18:43:14,665 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:43:14,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:43:14,673 INFO L225 Difference]: With dead ends: 6822 [2021-08-21 18:43:14,673 INFO L226 Difference]: Without dead ends: 6812 [2021-08-21 18:43:14,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 9738.1ms TimeCoverageRelationStatistics Valid=608, Invalid=3552, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 18:43:14,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6812 states. [2021-08-21 18:43:14,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6812 to 6725. [2021-08-21 18:43:14,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6725 states, 6724 states have (on average 2.2813801308744797) internal successors, (15340), 6724 states have internal predecessors, (15340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:14,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6725 states to 6725 states and 15340 transitions. [2021-08-21 18:43:14,758 INFO L78 Accepts]: Start accepts. Automaton has 6725 states and 15340 transitions. Word has length 30 [2021-08-21 18:43:14,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:43:14,758 INFO L470 AbstractCegarLoop]: Abstraction has 6725 states and 15340 transitions. [2021-08-21 18:43:14,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:14,758 INFO L276 IsEmpty]: Start isEmpty. Operand 6725 states and 15340 transitions. [2021-08-21 18:43:14,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:43:14,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:43:14,766 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] [2021-08-21 18:43:14,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-21 18:43:14,966 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,SelfDestructingSolverStorable107 [2021-08-21 18:43:14,966 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:43:14,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:43:14,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1454647590, now seen corresponding path program 30 times [2021-08-21 18:43:14,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:43:14,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661428506] [2021-08-21 18:43:14,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:43:14,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:43:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:43:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:16,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:43:16,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661428506] [2021-08-21 18:43:16,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661428506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:16,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211669554] [2021-08-21 18:43:16,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:43:16,608 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:16,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:43:16,608 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:43:16,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 18:43:22,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:43:22,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:43:22,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 18:43:22,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:43:25,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:43:25,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:43:25,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:43:25,273 INFO L354 Elim1Store]: treesize reduction 109, result has 8.4 percent of original size [2021-08-21 18:43:25,274 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 297 treesize of output 164 [2021-08-21 18:43:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:25,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211669554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:25,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:43:25,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-21 18:43:25,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340596108] [2021-08-21 18:43:25,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:43:25,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:43:25,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:43:25,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:43:25,562 INFO L87 Difference]: Start difference. First operand 6725 states and 15340 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:36,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:43:36,272 INFO L93 Difference]: Finished difference Result 6881 states and 15562 transitions. [2021-08-21 18:43:36,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 18:43:36,272 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:43:36,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:43:36,282 INFO L225 Difference]: With dead ends: 6881 [2021-08-21 18:43:36,282 INFO L226 Difference]: Without dead ends: 6871 [2021-08-21 18:43:36,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 10829.4ms TimeCoverageRelationStatistics Valid=761, Invalid=4789, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 18:43:36,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6871 states. [2021-08-21 18:43:36,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6871 to 6734. [2021-08-21 18:43:36,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6734 states, 6733 states have (on average 2.2802613990791625) internal successors, (15353), 6733 states have internal predecessors, (15353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:36,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6734 states to 6734 states and 15353 transitions. [2021-08-21 18:43:36,371 INFO L78 Accepts]: Start accepts. Automaton has 6734 states and 15353 transitions. Word has length 30 [2021-08-21 18:43:36,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:43:36,371 INFO L470 AbstractCegarLoop]: Abstraction has 6734 states and 15353 transitions. [2021-08-21 18:43:36,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:36,371 INFO L276 IsEmpty]: Start isEmpty. Operand 6734 states and 15353 transitions. [2021-08-21 18:43:36,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:43:36,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:43:36,380 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] [2021-08-21 18:43:36,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-21 18:43:36,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:36,580 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:43:36,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:43:36,581 INFO L82 PathProgramCache]: Analyzing trace with hash -988024870, now seen corresponding path program 77 times [2021-08-21 18:43:36,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:43:36,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379657968] [2021-08-21 18:43:36,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:43:36,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:43:36,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:43:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:37,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:43:37,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379657968] [2021-08-21 18:43:37,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379657968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:37,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228582206] [2021-08-21 18:43:37,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:43:37,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:37,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:43:37,601 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:43:37,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 18:43:43,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:43:43,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:43:43,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:43:43,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:43:49,209 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-21 18:43:49,210 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 239 treesize of output 156 [2021-08-21 18:43:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:49,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228582206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:49,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:43:49,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-21 18:43:49,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801475172] [2021-08-21 18:43:49,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:43:49,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:43:49,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:43:49,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:43:49,938 INFO L87 Difference]: Start difference. First operand 6734 states and 15353 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:55,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:43:55,489 INFO L93 Difference]: Finished difference Result 8335 states and 18769 transitions. [2021-08-21 18:43:55,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:43:55,489 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:43:55,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:43:55,524 INFO L225 Difference]: With dead ends: 8335 [2021-08-21 18:43:55,525 INFO L226 Difference]: Without dead ends: 8315 [2021-08-21 18:43:55,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 5479.3ms TimeCoverageRelationStatistics Valid=429, Invalid=2433, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 18:43:55,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8315 states. [2021-08-21 18:43:55,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8315 to 6733. [2021-08-21 18:43:55,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6733 states, 6732 states have (on average 2.2803030303030303) internal successors, (15351), 6732 states have internal predecessors, (15351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:55,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6733 states to 6733 states and 15351 transitions. [2021-08-21 18:43:55,624 INFO L78 Accepts]: Start accepts. Automaton has 6733 states and 15351 transitions. Word has length 30 [2021-08-21 18:43:55,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:43:55,625 INFO L470 AbstractCegarLoop]: Abstraction has 6733 states and 15351 transitions. [2021-08-21 18:43:55,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:55,625 INFO L276 IsEmpty]: Start isEmpty. Operand 6733 states and 15351 transitions. [2021-08-21 18:43:55,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:43:55,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:43:55,634 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] [2021-08-21 18:43:55,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-21 18:43:55,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:55,872 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:43:55,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:43:55,874 INFO L82 PathProgramCache]: Analyzing trace with hash -734235746, now seen corresponding path program 78 times [2021-08-21 18:43:55,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:43:55,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965351021] [2021-08-21 18:43:55,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:43:55,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:43:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:43:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:56,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:43:56,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965351021] [2021-08-21 18:43:56,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965351021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:56,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641033113] [2021-08-21 18:43:56,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:43:56,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:56,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:43:56,938 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:43:56,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 18:44:03,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:44:03,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:44:03,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 18:44:03,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:34,324 INFO L354 Elim1Store]: treesize reduction 66, result has 9.6 percent of original size [2021-08-21 18:44:34,324 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 223 treesize of output 153 [2021-08-21 18:44:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:35,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641033113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:35,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:35,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:44:35,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598090936] [2021-08-21 18:44:35,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:44:35,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:35,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:44:35,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:44:35,088 INFO L87 Difference]: Start difference. First operand 6733 states and 15351 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:37,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:37,222 INFO L93 Difference]: Finished difference Result 8799 states and 19822 transitions. [2021-08-21 18:44:37,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:44:37,223 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:44:37,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:37,235 INFO L225 Difference]: With dead ends: 8799 [2021-08-21 18:44:37,235 INFO L226 Difference]: Without dead ends: 8784 [2021-08-21 18:44:37,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 2131.2ms TimeCoverageRelationStatistics Valid=320, Invalid=1572, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:44:37,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8784 states. [2021-08-21 18:44:37,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8784 to 6739. [2021-08-21 18:44:37,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6739 states, 6738 states have (on average 2.280053428317008) internal successors, (15363), 6738 states have internal predecessors, (15363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:37,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6739 states to 6739 states and 15363 transitions. [2021-08-21 18:44:37,331 INFO L78 Accepts]: Start accepts. Automaton has 6739 states and 15363 transitions. Word has length 30 [2021-08-21 18:44:37,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:37,331 INFO L470 AbstractCegarLoop]: Abstraction has 6739 states and 15363 transitions. [2021-08-21 18:44:37,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:37,331 INFO L276 IsEmpty]: Start isEmpty. Operand 6739 states and 15363 transitions. [2021-08-21 18:44:37,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:44:37,339 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:37,339 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] [2021-08-21 18:44:37,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-21 18:44:37,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:37,540 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:44:37,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:37,540 INFO L82 PathProgramCache]: Analyzing trace with hash 542091226, now seen corresponding path program 79 times [2021-08-21 18:44:37,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:37,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521121739] [2021-08-21 18:44:37,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:37,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:38,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:38,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521121739] [2021-08-21 18:44:38,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521121739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:38,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621415951] [2021-08-21 18:44:38,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:44:38,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:38,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:38,537 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:44:38,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 18:44:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:45,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:44:45,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:51,538 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-21 18:44:51,538 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 218 treesize of output 145 [2021-08-21 18:44:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:52,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621415951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:52,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:52,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:44:52,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476954608] [2021-08-21 18:44:52,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:44:52,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:52,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:44:52,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:44:52,455 INFO L87 Difference]: Start difference. First operand 6739 states and 15363 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-08-21 18:44:54,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:44:54,459 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 18:44:54,472 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 18:44:54,473 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 18:44:54,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-21 18:44:54,659 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,SelfDestructingSolverStorable111 [2021-08-21 18:44:54,659 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (6739states) and FLOYD_HOARE automaton (currently 27 states, 22 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 40 known predicates. [2021-08-21 18:44:54,660 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 18:44:54,661 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 18:44:54,661 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 18:44:54,663 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 18:44:54,663 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 18:44:54,664 INFO L202 PluginConnector]: Adding new model max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:44:54 BasicIcfg [2021-08-21 18:44:54,664 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 18:44:54,665 INFO L168 Benchmark]: Toolchain (without parser) took 730440.38 ms. Allocated memory was 202.4 MB in the beginning and 2.4 GB in the end (delta: 2.2 GB). Free memory was 182.2 MB in the beginning and 1.6 GB in the end (delta: -1.4 GB). Peak memory consumption was 821.2 MB. Max. memory is 8.0 GB. [2021-08-21 18:44:54,665 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 202.4 MB. Free memory is still 183.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:44:54,665 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.47 ms. Allocated memory is still 202.4 MB. Free memory was 182.1 MB in the beginning and 180.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-08-21 18:44:54,665 INFO L168 Benchmark]: Boogie Preprocessor took 10.84 ms. Allocated memory is still 202.4 MB. Free memory was 180.7 MB in the beginning and 179.8 MB in the end (delta: 899.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:44:54,665 INFO L168 Benchmark]: RCFGBuilder took 210.81 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 166.6 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-21 18:44:54,665 INFO L168 Benchmark]: TraceAbstraction took 730196.62 ms. Allocated memory was 202.4 MB in the beginning and 2.4 GB in the end (delta: 2.2 GB). Free memory was 166.1 MB in the beginning and 1.6 GB in the end (delta: -1.4 GB). Peak memory consumption was 804.4 MB. Max. memory is 8.0 GB. [2021-08-21 18:44:54,666 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 0.11 ms. Allocated memory is still 202.4 MB. Free memory is still 183.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 18.47 ms. Allocated memory is still 202.4 MB. Free memory was 182.1 MB in the beginning and 180.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 10.84 ms. Allocated memory is still 202.4 MB. Free memory was 180.7 MB in the beginning and 179.8 MB in the end (delta: 899.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 210.81 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 166.6 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 730196.62 ms. Allocated memory was 202.4 MB in the beginning and 2.4 GB in the end (delta: 2.2 GB). Free memory was 166.1 MB in the beginning and 1.6 GB in the end (delta: -1.4 GB). Peak memory consumption was 804.4 MB. 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 (6739states) and FLOYD_HOARE automaton (currently 27 states, 22 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 40 known predicates. - 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 (6739states) and FLOYD_HOARE automaton (currently 27 states, 22 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 40 known predicates. - 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 (6739states) and FLOYD_HOARE automaton (currently 27 states, 22 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 40 known predicates. - 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 (6739states) and FLOYD_HOARE automaton (currently 27 states, 22 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 40 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 730111.9ms, OverallIterations: 112, TraceHistogramMax: 3, EmptinessCheckTime: 295.4ms, AutomataDifference: 158187.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 120.9ms, PartialOrderReductionTime: 108.7ms, HoareTripleCheckerStatistics: 2802 SDtfs, 17388 SDslu, 19539 SDs, 0 SdLazy, 42604 SolverSat, 3651 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 24537.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6149 GetRequests, 2288 SyntacticMatches, 119 SemanticMatches, 3741 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45310 ImplicationChecksByTransitivity, 155938.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6739occurred in iteration=111, InterpolantAutomatonStates: 2957, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2894.4ms AutomataMinimizationTime, 111 MinimizatonAttempts, 52717 StatesRemovedByMinimization, 111 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 374.2ms SsaConstructionTime, 1923.7ms SatisfiabilityAnalysisTime, 206295.4ms InterpolantComputationTime, 5962 NumberOfCodeBlocks, 5962 NumberOfCodeBlocksAsserted, 362 NumberOfCheckSat, 5741 ConstructedInterpolants, 126 QuantifiedInterpolants, 149314 SizeOfPredicates, 538 NumberOfNonLiveVariables, 7707 ConjunctsInSsa, 1908 ConjunctsInUnsatCore, 221 InterpolantComputations, 3 PerfectInterpolantSequences, 374/1896 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