/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-min.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:56:56,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:56:56,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:56:56,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:56:56,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 12:56:56,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 12:56:56,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 12:56:56,943 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-21 12:56:56,959 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:56:56,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:56:56,959 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:56:56,959 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:56:56,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:56:56,960 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:56:56,960 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:56:56,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:56:56,960 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:56:56,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:56:56,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:56:56,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:56:56,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:56:56,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:56:56,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:56:56,961 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:56:56,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:56:56,961 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:56:56,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:56:56,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:56:56,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:56:56,962 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:56:56,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:56:56,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:56:56,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:56:56,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:56:56,963 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:56:56,963 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:56:56,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:56:56,963 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:56:56,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:56:56,963 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:56:57,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:56:57,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:56:57,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:56:57,225 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:56:57,229 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:56:57,229 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-min.wvr.bpl [2021-08-21 12:56:57,230 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-min.wvr.bpl' [2021-08-21 12:56:57,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:56:57,257 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:56:57,258 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:56:57,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:56:57,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:56:57,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:56:57" (1/1) ... [2021-08-21 12:56:57,270 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:56:57" (1/1) ... [2021-08-21 12:56:57,275 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:56:57,276 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:56:57,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:56:57,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:56:57,281 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:56:57" (1/1) ... [2021-08-21 12:56:57,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:56:57" (1/1) ... [2021-08-21 12:56:57,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:56:57" (1/1) ... [2021-08-21 12:56:57,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:56:57" (1/1) ... [2021-08-21 12:56:57,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:56:57" (1/1) ... [2021-08-21 12:56:57,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:56:57" (1/1) ... [2021-08-21 12:56:57,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:56:57" (1/1) ... [2021-08-21 12:56:57,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:56:57,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:56:57,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:56:57,288 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:56:57,288 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:56:57" (1/1) ... [2021-08-21 12:56:57,293 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:56:57,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:57,307 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 12:56:57,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 12:56:57,332 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:56:57,332 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:56:57,332 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:56:57,332 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:56:57,332 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:56:57,332 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:56:57,333 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:56:57,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:56:57,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:56:57,333 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 12:56:57,333 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 12:56:57,333 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 12:56:57,334 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 12:56:57,476 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:56:57,476 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 12:56:57,478 INFO L202 PluginConnector]: Adding new model three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:56:57 BoogieIcfgContainer [2021-08-21 12:56:57,478 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:56:57,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:56:57,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:56:57,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:56:57,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:56:57" (1/2) ... [2021-08-21 12:56:57,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f028a79 and model type three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:56:57, skipping insertion in model container [2021-08-21 12:56:57,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:56:57" (2/2) ... [2021-08-21 12:56:57,483 INFO L111 eAbstractionObserver]: Analyzing ICFG three-array-min.wvr.bpl [2021-08-21 12:56:57,486 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:56:57,486 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:56:57,486 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:56:57,486 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:56:57,531 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 12:56:57,557 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:56:57,561 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 12:56:57,561 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 12:56:57,567 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 32 transitions, 88 flow [2021-08-21 12:56:57,599 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 134 states, 133 states have (on average 2.9774436090225564) internal successors, (396), 133 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:57,601 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 133 states have (on average 2.9774436090225564) internal successors, (396), 133 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:57,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:56:57,607 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:57,608 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:57,608 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:56:57,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:57,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1053276962, now seen corresponding path program 1 times [2021-08-21 12:56:57,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:57,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481177307] [2021-08-21 12:56:57,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:57,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:57,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:57,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481177307] [2021-08-21 12:56:57,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481177307] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:56:57,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:56:57,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:56:57,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937901673] [2021-08-21 12:56:57,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:56:57,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:57,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:56:57,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:56:57,816 INFO L87 Difference]: Start difference. First operand has 134 states, 133 states have (on average 2.9774436090225564) internal successors, (396), 133 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:57,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:57,876 INFO L93 Difference]: Finished difference Result 474 states and 1450 transitions. [2021-08-21 12:56:57,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:56:57,877 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:56:57,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:57,887 INFO L225 Difference]: With dead ends: 474 [2021-08-21 12:56:57,887 INFO L226 Difference]: Without dead ends: 388 [2021-08-21 12:56:57,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:56:57,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-08-21 12:56:57,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 176. [2021-08-21 12:56:57,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 3.0914285714285716) internal successors, (541), 175 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:57,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 541 transitions. [2021-08-21 12:56:57,946 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 541 transitions. Word has length 19 [2021-08-21 12:56:57,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:57,947 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 541 transitions. [2021-08-21 12:56:57,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:57,947 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 541 transitions. [2021-08-21 12:56:57,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:56:57,948 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:57,948 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 12:56:57,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:56:57,949 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:56:57,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:57,949 INFO L82 PathProgramCache]: Analyzing trace with hash -324392928, now seen corresponding path program 1 times [2021-08-21 12:56:57,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:57,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861835702] [2021-08-21 12:56:57,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:57,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:57,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:57,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861835702] [2021-08-21 12:56:57,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861835702] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:56:57,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:56:57,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:56:57,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727125234] [2021-08-21 12:56:57,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:56:57,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:57,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:56:57,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:56:57,988 INFO L87 Difference]: Start difference. First operand 176 states and 541 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:58,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:58,057 INFO L93 Difference]: Finished difference Result 272 states and 825 transitions. [2021-08-21 12:56:58,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:56:58,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:56:58,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:58,062 INFO L225 Difference]: With dead ends: 272 [2021-08-21 12:56:58,062 INFO L226 Difference]: Without dead ends: 249 [2021-08-21 12:56:58,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:56:58,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-08-21 12:56:58,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 232. [2021-08-21 12:56:58,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 3.051948051948052) internal successors, (705), 231 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:58,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 705 transitions. [2021-08-21 12:56:58,075 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 705 transitions. Word has length 22 [2021-08-21 12:56:58,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:58,075 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 705 transitions. [2021-08-21 12:56:58,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:58,075 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 705 transitions. [2021-08-21 12:56:58,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:56:58,080 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:58,081 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 12:56:58,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 12:56:58,081 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:56:58,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:58,082 INFO L82 PathProgramCache]: Analyzing trace with hash -2144032734, now seen corresponding path program 2 times [2021-08-21 12:56:58,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:58,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407374848] [2021-08-21 12:56:58,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:58,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:58,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:58,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:58,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:58,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407374848] [2021-08-21 12:56:58,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407374848] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:56:58,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:56:58,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:56:58,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395724414] [2021-08-21 12:56:58,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:56:58,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:58,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:56:58,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:56:58,130 INFO L87 Difference]: Start difference. First operand 232 states and 705 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:58,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:58,184 INFO L93 Difference]: Finished difference Result 371 states and 1117 transitions. [2021-08-21 12:56:58,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:56:58,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:56:58,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:58,188 INFO L225 Difference]: With dead ends: 371 [2021-08-21 12:56:58,189 INFO L226 Difference]: Without dead ends: 348 [2021-08-21 12:56:58,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:56:58,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-08-21 12:56:58,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 267. [2021-08-21 12:56:58,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 3.1203007518796992) internal successors, (830), 266 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:58,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 830 transitions. [2021-08-21 12:56:58,212 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 830 transitions. Word has length 22 [2021-08-21 12:56:58,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:58,212 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 830 transitions. [2021-08-21 12:56:58,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:58,213 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 830 transitions. [2021-08-21 12:56:58,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:56:58,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:58,213 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 12:56:58,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 12:56:58,214 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:56:58,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:58,214 INFO L82 PathProgramCache]: Analyzing trace with hash -698997086, now seen corresponding path program 3 times [2021-08-21 12:56:58,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:58,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496167501] [2021-08-21 12:56:58,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:58,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:58,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:58,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496167501] [2021-08-21 12:56:58,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496167501] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:56:58,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:56:58,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:56:58,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746239341] [2021-08-21 12:56:58,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:56:58,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:58,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:56:58,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:56:58,300 INFO L87 Difference]: Start difference. First operand 267 states and 830 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:58,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:58,337 INFO L93 Difference]: Finished difference Result 301 states and 881 transitions. [2021-08-21 12:56:58,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:56:58,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:56:58,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:58,338 INFO L225 Difference]: With dead ends: 301 [2021-08-21 12:56:58,338 INFO L226 Difference]: Without dead ends: 279 [2021-08-21 12:56:58,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:56:58,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-08-21 12:56:58,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 272. [2021-08-21 12:56:58,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.022140221402214) internal successors, (819), 271 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:58,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 819 transitions. [2021-08-21 12:56:58,346 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 819 transitions. Word has length 22 [2021-08-21 12:56:58,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:58,347 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 819 transitions. [2021-08-21 12:56:58,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:58,347 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 819 transitions. [2021-08-21 12:56:58,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:56:58,348 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:58,348 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 12:56:58,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 12:56:58,348 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:56:58,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:58,348 INFO L82 PathProgramCache]: Analyzing trace with hash 665668420, now seen corresponding path program 1 times [2021-08-21 12:56:58,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:58,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532012587] [2021-08-21 12:56:58,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:58,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:58,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:58,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:58,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532012587] [2021-08-21 12:56:58,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532012587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:58,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386451845] [2021-08-21 12:56:58,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:58,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:58,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:58,395 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:56:58,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 12:56:58,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:58,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 12:56:58,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:58,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386451845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:58,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:58,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-21 12:56:58,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876385900] [2021-08-21 12:56:58,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:56:58,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:58,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:56:58,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:56:58,528 INFO L87 Difference]: Start difference. First operand 272 states and 819 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:58,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:58,570 INFO L93 Difference]: Finished difference Result 360 states and 1056 transitions. [2021-08-21 12:56:58,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:56:58,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:56:58,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:58,572 INFO L225 Difference]: With dead ends: 360 [2021-08-21 12:56:58,572 INFO L226 Difference]: Without dead ends: 360 [2021-08-21 12:56:58,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:56:58,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-08-21 12:56:58,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 288. [2021-08-21 12:56:58,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 3.0034843205574915) internal successors, (862), 287 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:58,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 862 transitions. [2021-08-21 12:56:58,581 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 862 transitions. Word has length 24 [2021-08-21 12:56:58,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:58,581 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 862 transitions. [2021-08-21 12:56:58,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:58,581 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 862 transitions. [2021-08-21 12:56:58,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:56:58,582 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:58,582 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 12:56:58,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 12:56:58,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:58,789 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:56:58,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:58,789 INFO L82 PathProgramCache]: Analyzing trace with hash 55281188, now seen corresponding path program 2 times [2021-08-21 12:56:58,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:58,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881254239] [2021-08-21 12:56:58,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:58,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:58,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:56:58,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:58,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881254239] [2021-08-21 12:56:58,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881254239] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:56:58,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:56:58,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:56:58,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301579014] [2021-08-21 12:56:58,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:56:58,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:58,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:56:58,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:56:58,834 INFO L87 Difference]: Start difference. First operand 288 states and 862 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:58,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:58,859 INFO L93 Difference]: Finished difference Result 276 states and 851 transitions. [2021-08-21 12:56:58,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:56:58,859 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 12:56:58,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:58,861 INFO L225 Difference]: With dead ends: 276 [2021-08-21 12:56:58,861 INFO L226 Difference]: Without dead ends: 276 [2021-08-21 12:56:58,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:56:58,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-08-21 12:56:58,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 243. [2021-08-21 12:56:58,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 3.0950413223140494) internal successors, (749), 242 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 12:56:58,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 749 transitions. [2021-08-21 12:56:58,866 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 749 transitions. Word has length 24 [2021-08-21 12:56:58,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:58,867 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 749 transitions. [2021-08-21 12:56:58,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:58,867 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 749 transitions. [2021-08-21 12:56:58,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:56:58,867 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:58,868 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, 1, 1] [2021-08-21 12:56:58,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 12:56:58,868 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:56:58,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:58,868 INFO L82 PathProgramCache]: Analyzing trace with hash 109515422, now seen corresponding path program 1 times [2021-08-21 12:56:58,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:58,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199382627] [2021-08-21 12:56:58,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:58,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:59,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:59,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199382627] [2021-08-21 12:56:59,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199382627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:59,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807067381] [2021-08-21 12:56:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:59,242 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:59,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:59,242 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:56:59,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 12:56:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:59,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:56:59,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:59,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 60 [2021-08-21 12:56:59,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 45 [2021-08-21 12:56:59,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 44 [2021-08-21 12:57:00,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-08-21 12:57:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:00,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807067381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:00,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:00,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:57:00,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753796016] [2021-08-21 12:57:00,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:57:00,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:00,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:57:00,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:57:00,073 INFO L87 Difference]: Start difference. First operand 243 states and 749 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:00,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:00,348 INFO L93 Difference]: Finished difference Result 471 states and 1460 transitions. [2021-08-21 12:57:00,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:57:00,349 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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 12:57:00,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:00,351 INFO L225 Difference]: With dead ends: 471 [2021-08-21 12:57:00,351 INFO L226 Difference]: Without dead ends: 428 [2021-08-21 12:57:00,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 332.5ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:57:00,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-08-21 12:57:00,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 329. [2021-08-21 12:57:00,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.1219512195121952) internal successors, (1024), 328 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:00,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1024 transitions. [2021-08-21 12:57:00,358 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1024 transitions. Word has length 26 [2021-08-21 12:57:00,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:00,359 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 1024 transitions. [2021-08-21 12:57:00,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:00,359 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1024 transitions. [2021-08-21 12:57:00,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:57:00,360 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:00,360 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, 1, 1] [2021-08-21 12:57:00,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:00,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-08-21 12:57:00,577 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:00,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:00,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1564312640, now seen corresponding path program 2 times [2021-08-21 12:57:00,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:00,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910045250] [2021-08-21 12:57:00,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:00,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:00,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:00,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910045250] [2021-08-21 12:57:00,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910045250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:00,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919937881] [2021-08-21 12:57:00,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:57:00,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:00,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:00,836 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:00,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 12:57:00,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:57:00,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:00,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:57:00,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:01,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:57:01,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2021-08-21 12:57:01,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 49 [2021-08-21 12:57:01,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-08-21 12:57:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:01,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919937881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:01,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:01,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:57:01,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118188046] [2021-08-21 12:57:01,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:57:01,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:01,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:57:01,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:57:01,551 INFO L87 Difference]: Start difference. First operand 329 states and 1024 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:01,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:01,688 INFO L93 Difference]: Finished difference Result 576 states and 1820 transitions. [2021-08-21 12:57:01,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:57:01,691 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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 12:57:01,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:01,694 INFO L225 Difference]: With dead ends: 576 [2021-08-21 12:57:01,694 INFO L226 Difference]: Without dead ends: 533 [2021-08-21 12:57:01,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 147.3ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:57:01,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-08-21 12:57:01,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 349. [2021-08-21 12:57:01,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1264367816091956) internal successors, (1088), 348 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:01,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1088 transitions. [2021-08-21 12:57:01,703 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1088 transitions. Word has length 26 [2021-08-21 12:57:01,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:01,703 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 1088 transitions. [2021-08-21 12:57:01,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:01,703 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1088 transitions. [2021-08-21 12:57:01,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:57:01,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:01,705 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, 1, 1] [2021-08-21 12:57:01,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-08-21 12:57:01,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:01,921 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:01,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:01,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1161623412, now seen corresponding path program 3 times [2021-08-21 12:57:01,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:01,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674203150] [2021-08-21 12:57:01,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:01,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:02,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:02,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674203150] [2021-08-21 12:57:02,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674203150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:02,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663293925] [2021-08-21 12:57:02,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:57:02,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:02,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:02,117 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:02,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 12:57:02,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:57:02,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:02,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:57:02,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:02,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:57:02,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2021-08-21 12:57:02,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 58 [2021-08-21 12:57:02,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2021-08-21 12:57:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:02,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663293925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:02,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:02,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:57:02,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693613475] [2021-08-21 12:57:02,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:57:02,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:02,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:57:02,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:57:02,749 INFO L87 Difference]: Start difference. First operand 349 states and 1088 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:02,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:02,832 INFO L93 Difference]: Finished difference Result 537 states and 1693 transitions. [2021-08-21 12:57:02,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:57:02,832 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:57:02,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:02,836 INFO L225 Difference]: With dead ends: 537 [2021-08-21 12:57:02,836 INFO L226 Difference]: Without dead ends: 478 [2021-08-21 12:57:02,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:57:02,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-08-21 12:57:02,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 349. [2021-08-21 12:57:02,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1436781609195403) internal successors, (1094), 348 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:02,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1094 transitions. [2021-08-21 12:57:02,845 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1094 transitions. Word has length 26 [2021-08-21 12:57:02,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:02,845 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 1094 transitions. [2021-08-21 12:57:02,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:02,845 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1094 transitions. [2021-08-21 12:57:02,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 12:57:02,846 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:02,847 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, 1, 1] [2021-08-21 12:57:02,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:03,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:03,065 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:03,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:03,065 INFO L82 PathProgramCache]: Analyzing trace with hash -709205764, now seen corresponding path program 4 times [2021-08-21 12:57:03,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:03,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874243784] [2021-08-21 12:57:03,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:03,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:03,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:03,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:03,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874243784] [2021-08-21 12:57:03,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874243784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:03,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094883252] [2021-08-21 12:57:03,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:57:03,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:03,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:03,111 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:03,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 12:57:03,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:57:03,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:03,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:57:03,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:03,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094883252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:03,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:03,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 12:57:03,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627894822] [2021-08-21 12:57:03,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:57:03,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:03,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:57:03,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:57:03,350 INFO L87 Difference]: Start difference. First operand 349 states and 1094 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:03,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:03,418 INFO L93 Difference]: Finished difference Result 871 states and 2716 transitions. [2021-08-21 12:57:03,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:57:03,418 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 12:57:03,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:03,423 INFO L225 Difference]: With dead ends: 871 [2021-08-21 12:57:03,423 INFO L226 Difference]: Without dead ends: 871 [2021-08-21 12:57:03,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:57:03,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-08-21 12:57:03,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 579. [2021-08-21 12:57:03,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 3.330449826989619) internal successors, (1925), 578 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:03,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1925 transitions. [2021-08-21 12:57:03,437 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1925 transitions. Word has length 28 [2021-08-21 12:57:03,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:03,437 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 1925 transitions. [2021-08-21 12:57:03,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:03,437 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1925 transitions. [2021-08-21 12:57:03,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 12:57:03,439 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:03,440 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, 1, 1] [2021-08-21 12:57:03,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:03,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-21 12:57:03,659 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:03,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:03,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1896545024, now seen corresponding path program 5 times [2021-08-21 12:57:03,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:03,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112637717] [2021-08-21 12:57:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:03,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:03,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:03,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:03,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112637717] [2021-08-21 12:57:03,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112637717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:03,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008685734] [2021-08-21 12:57:03,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:57:03,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:03,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:03,691 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:03,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 12:57:03,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:57:03,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:03,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:57:03,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:03,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008685734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:03,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:03,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 12:57:03,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423454274] [2021-08-21 12:57:03,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:57:03,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:03,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:57:03,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:57:03,952 INFO L87 Difference]: Start difference. First operand 579 states and 1925 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:04,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:04,014 INFO L93 Difference]: Finished difference Result 861 states and 2683 transitions. [2021-08-21 12:57:04,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:57:04,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 12:57:04,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:04,018 INFO L225 Difference]: With dead ends: 861 [2021-08-21 12:57:04,018 INFO L226 Difference]: Without dead ends: 861 [2021-08-21 12:57:04,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:57:04,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-08-21 12:57:04,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 575. [2021-08-21 12:57:04,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 3.308362369337979) internal successors, (1899), 574 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:04,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1899 transitions. [2021-08-21 12:57:04,031 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1899 transitions. Word has length 28 [2021-08-21 12:57:04,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:04,031 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 1899 transitions. [2021-08-21 12:57:04,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:04,031 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1899 transitions. [2021-08-21 12:57:04,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 12:57:04,032 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:04,032 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, 1, 1] [2021-08-21 12:57:04,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:04,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:04,245 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:04,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:04,245 INFO L82 PathProgramCache]: Analyzing trace with hash 454285246, now seen corresponding path program 6 times [2021-08-21 12:57:04,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:04,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175657636] [2021-08-21 12:57:04,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:04,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:04,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:04,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175657636] [2021-08-21 12:57:04,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175657636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:04,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280174192] [2021-08-21 12:57:04,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:57:04,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:04,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:04,272 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:04,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 12:57:04,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:57:04,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:04,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:57:04,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:04,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280174192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:04,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:04,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-21 12:57:04,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977627099] [2021-08-21 12:57:04,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:57:04,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:04,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:57:04,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:57:04,532 INFO L87 Difference]: Start difference. First operand 575 states and 1899 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:05,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:05,009 INFO L93 Difference]: Finished difference Result 2153 states and 6965 transitions. [2021-08-21 12:57:05,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 12:57:05,009 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 12:57:05,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:05,018 INFO L225 Difference]: With dead ends: 2153 [2021-08-21 12:57:05,018 INFO L226 Difference]: Without dead ends: 2153 [2021-08-21 12:57:05,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 234.7ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:57:05,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2021-08-21 12:57:05,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 741. [2021-08-21 12:57:05,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.574324324324324) internal successors, (2645), 740 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:05,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2645 transitions. [2021-08-21 12:57:05,043 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2645 transitions. Word has length 28 [2021-08-21 12:57:05,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:05,043 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 2645 transitions. [2021-08-21 12:57:05,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:05,043 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2645 transitions. [2021-08-21 12:57:05,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:57:05,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:05,044 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 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 12:57:05,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:05,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:05,261 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:05,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:05,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1068511452, now seen corresponding path program 7 times [2021-08-21 12:57:05,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:05,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751899592] [2021-08-21 12:57:05,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:05,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:05,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:05,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751899592] [2021-08-21 12:57:05,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751899592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:05,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983282625] [2021-08-21 12:57:05,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:57:05,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:05,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:05,298 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:05,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 12:57:05,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:05,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:57:05,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:05,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983282625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:05,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:05,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 12:57:05,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791721230] [2021-08-21 12:57:05,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:57:05,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:05,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:57:05,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:57:05,550 INFO L87 Difference]: Start difference. First operand 741 states and 2645 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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 12:57:05,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:05,633 INFO L93 Difference]: Finished difference Result 1909 states and 6809 transitions. [2021-08-21 12:57:05,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:57:05,633 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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 29 [2021-08-21 12:57:05,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:05,641 INFO L225 Difference]: With dead ends: 1909 [2021-08-21 12:57:05,641 INFO L226 Difference]: Without dead ends: 1747 [2021-08-21 12:57:05,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:57:05,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-08-21 12:57:05,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1449. [2021-08-21 12:57:05,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 3.7327348066298343) internal successors, (5405), 1448 states have internal predecessors, (5405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:05,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 5405 transitions. [2021-08-21 12:57:05,676 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 5405 transitions. Word has length 29 [2021-08-21 12:57:05,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:05,676 INFO L470 AbstractCegarLoop]: Abstraction has 1449 states and 5405 transitions. [2021-08-21 12:57:05,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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 12:57:05,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 5405 transitions. [2021-08-21 12:57:05,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:57:05,680 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:05,680 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 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 12:57:05,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:05,896 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,SelfDestructingSolverStorable12 [2021-08-21 12:57:05,897 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:05,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:05,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1671938888, now seen corresponding path program 8 times [2021-08-21 12:57:05,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:05,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121721253] [2021-08-21 12:57:05,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:05,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:05,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:05,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121721253] [2021-08-21 12:57:05,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121721253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:05,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917298149] [2021-08-21 12:57:05,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:57:05,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:05,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:05,946 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:05,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 12:57:06,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:57:06,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:06,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:57:06,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:06,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917298149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:06,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:06,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-08-21 12:57:06,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776690428] [2021-08-21 12:57:06,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:57:06,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:06,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:57:06,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:57:06,216 INFO L87 Difference]: Start difference. First operand 1449 states and 5405 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:06,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:06,705 INFO L93 Difference]: Finished difference Result 3995 states and 14025 transitions. [2021-08-21 12:57:06,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 12:57:06,705 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:57:06,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:06,722 INFO L225 Difference]: With dead ends: 3995 [2021-08-21 12:57:06,722 INFO L226 Difference]: Without dead ends: 3839 [2021-08-21 12:57:06,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:57:06,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3839 states. [2021-08-21 12:57:06,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3839 to 2530. [2021-08-21 12:57:06,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2529 states have (on average 3.837089758797944) internal successors, (9704), 2529 states have internal predecessors, (9704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:06,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 9704 transitions. [2021-08-21 12:57:06,814 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 9704 transitions. Word has length 29 [2021-08-21 12:57:06,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:06,815 INFO L470 AbstractCegarLoop]: Abstraction has 2530 states and 9704 transitions. [2021-08-21 12:57:06,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:06,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 9704 transitions. [2021-08-21 12:57:06,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:57:06,821 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:06,821 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 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 12:57:06,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:07,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 12:57:07,037 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:07,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:07,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1406736764, now seen corresponding path program 9 times [2021-08-21 12:57:07,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:07,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299200245] [2021-08-21 12:57:07,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:07,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:07,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:07,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299200245] [2021-08-21 12:57:07,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299200245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:07,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533847001] [2021-08-21 12:57:07,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:57:07,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:07,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:07,071 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:07,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 12:57:07,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:57:07,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:07,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:57:07,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:07,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533847001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:07,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:07,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 12:57:07,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114593162] [2021-08-21 12:57:07,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:57:07,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:07,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:57:07,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:57:07,355 INFO L87 Difference]: Start difference. First operand 2530 states and 9704 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:07,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:07,450 INFO L93 Difference]: Finished difference Result 3602 states and 13510 transitions. [2021-08-21 12:57:07,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:57:07,450 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:57:07,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:07,465 INFO L225 Difference]: With dead ends: 3602 [2021-08-21 12:57:07,465 INFO L226 Difference]: Without dead ends: 3568 [2021-08-21 12:57:07,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:57:07,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3568 states. [2021-08-21 12:57:07,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3568 to 3231. [2021-08-21 12:57:07,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3231 states, 3230 states have (on average 3.8625386996904023) internal successors, (12476), 3230 states have internal predecessors, (12476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:07,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3231 states to 3231 states and 12476 transitions. [2021-08-21 12:57:07,534 INFO L78 Accepts]: Start accepts. Automaton has 3231 states and 12476 transitions. Word has length 29 [2021-08-21 12:57:07,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:07,535 INFO L470 AbstractCegarLoop]: Abstraction has 3231 states and 12476 transitions. [2021-08-21 12:57:07,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:07,535 INFO L276 IsEmpty]: Start isEmpty. Operand 3231 states and 12476 transitions. [2021-08-21 12:57:07,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:57:07,542 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:07,542 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 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 12:57:07,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:07,749 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,SelfDestructingSolverStorable14 [2021-08-21 12:57:07,750 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:07,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:07,750 INFO L82 PathProgramCache]: Analyzing trace with hash 466613648, now seen corresponding path program 10 times [2021-08-21 12:57:07,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:07,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713847438] [2021-08-21 12:57:07,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:07,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:07,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:07,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:07,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713847438] [2021-08-21 12:57:07,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713847438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:07,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206633891] [2021-08-21 12:57:07,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:57:07,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:07,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:07,778 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:07,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 12:57:08,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:57:08,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:08,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:57:08,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:08,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206633891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:08,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:08,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 12:57:08,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612449975] [2021-08-21 12:57:08,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:57:08,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:08,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:57:08,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:57:08,082 INFO L87 Difference]: Start difference. First operand 3231 states and 12476 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:08,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:08,159 INFO L93 Difference]: Finished difference Result 3778 states and 14160 transitions. [2021-08-21 12:57:08,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:57:08,159 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:57:08,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:08,169 INFO L225 Difference]: With dead ends: 3778 [2021-08-21 12:57:08,169 INFO L226 Difference]: Without dead ends: 3778 [2021-08-21 12:57:08,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:57:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3778 states. [2021-08-21 12:57:08,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3778 to 3280. [2021-08-21 12:57:08,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 3279 states have (on average 3.868862458066484) internal successors, (12686), 3279 states have internal predecessors, (12686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:08,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 12686 transitions. [2021-08-21 12:57:08,248 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 12686 transitions. Word has length 29 [2021-08-21 12:57:08,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:08,248 INFO L470 AbstractCegarLoop]: Abstraction has 3280 states and 12686 transitions. [2021-08-21 12:57:08,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:08,248 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 12686 transitions. [2021-08-21 12:57:08,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:57:08,255 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:08,255 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 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 12:57:08,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:08,472 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,SelfDestructingSolverStorable15 [2021-08-21 12:57:08,472 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:08,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:08,472 INFO L82 PathProgramCache]: Analyzing trace with hash -339625636, now seen corresponding path program 11 times [2021-08-21 12:57:08,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:08,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487646812] [2021-08-21 12:57:08,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:08,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:08,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:08,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487646812] [2021-08-21 12:57:08,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487646812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:08,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7307527] [2021-08-21 12:57:08,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:57:08,500 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:08,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:08,500 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:08,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 12:57:08,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:57:08,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:08,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:57:08,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:08,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7307527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:08,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:08,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 12:57:08,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071310657] [2021-08-21 12:57:08,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:57:08,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:08,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:57:08,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:57:08,780 INFO L87 Difference]: Start difference. First operand 3280 states and 12686 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:08,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:08,883 INFO L93 Difference]: Finished difference Result 3719 states and 13964 transitions. [2021-08-21 12:57:08,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:57:08,884 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:57:08,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:08,894 INFO L225 Difference]: With dead ends: 3719 [2021-08-21 12:57:08,894 INFO L226 Difference]: Without dead ends: 3719 [2021-08-21 12:57:08,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:57:08,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-08-21 12:57:08,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 3290. [2021-08-21 12:57:08,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 3289 states have (on average 3.834296138643965) internal successors, (12611), 3289 states have internal predecessors, (12611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:08,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 12611 transitions. [2021-08-21 12:57:08,962 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 12611 transitions. Word has length 29 [2021-08-21 12:57:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:08,962 INFO L470 AbstractCegarLoop]: Abstraction has 3290 states and 12611 transitions. [2021-08-21 12:57:08,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:08,962 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 12611 transitions. [2021-08-21 12:57:08,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:57:08,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:08,969 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:08,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:09,180 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,SelfDestructingSolverStorable16 [2021-08-21 12:57:09,181 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:09,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:09,181 INFO L82 PathProgramCache]: Analyzing trace with hash 669340768, now seen corresponding path program 12 times [2021-08-21 12:57:09,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:09,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330797877] [2021-08-21 12:57:09,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:09,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:09,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:09,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330797877] [2021-08-21 12:57:09,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330797877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:09,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560544646] [2021-08-21 12:57:09,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:57:09,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:09,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:09,211 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:09,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 12:57:09,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:57:09,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:09,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:57:09,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:09,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:09,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560544646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:09,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:09,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 12:57:09,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339830210] [2021-08-21 12:57:09,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:57:09,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:09,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:57:09,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:57:09,490 INFO L87 Difference]: Start difference. First operand 3290 states and 12611 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:09,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:09,602 INFO L93 Difference]: Finished difference Result 6009 states and 21708 transitions. [2021-08-21 12:57:09,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:57:09,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 31 [2021-08-21 12:57:09,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:09,618 INFO L225 Difference]: With dead ends: 6009 [2021-08-21 12:57:09,619 INFO L226 Difference]: Without dead ends: 5981 [2021-08-21 12:57:09,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:57:09,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5981 states. [2021-08-21 12:57:09,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5981 to 4628. [2021-08-21 12:57:09,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4628 states, 4627 states have (on average 3.7905770477631293) internal successors, (17539), 4627 states have internal predecessors, (17539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:09,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 17539 transitions. [2021-08-21 12:57:09,736 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 17539 transitions. Word has length 31 [2021-08-21 12:57:09,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:09,736 INFO L470 AbstractCegarLoop]: Abstraction has 4628 states and 17539 transitions. [2021-08-21 12:57:09,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:09,737 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 17539 transitions. [2021-08-21 12:57:09,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:57:09,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:09,746 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:09,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:09,960 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,SelfDestructingSolverStorable17 [2021-08-21 12:57:09,961 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:09,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:09,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1344478628, now seen corresponding path program 13 times [2021-08-21 12:57:09,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:09,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552486388] [2021-08-21 12:57:09,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:09,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:09,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:09,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552486388] [2021-08-21 12:57:09,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552486388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:09,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215089177] [2021-08-21 12:57:09,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:57:09,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:09,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:09,996 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:09,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 12:57:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:10,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:57:10,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:10,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215089177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:10,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:10,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-21 12:57:10,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107539936] [2021-08-21 12:57:10,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:57:10,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:10,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:57:10,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:57:10,295 INFO L87 Difference]: Start difference. First operand 4628 states and 17539 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:10,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:10,783 INFO L93 Difference]: Finished difference Result 6507 states and 22973 transitions. [2021-08-21 12:57:10,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:57:10,784 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 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 31 [2021-08-21 12:57:10,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:10,800 INFO L225 Difference]: With dead ends: 6507 [2021-08-21 12:57:10,800 INFO L226 Difference]: Without dead ends: 6444 [2021-08-21 12:57:10,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 224.8ms TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:57:10,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6444 states. [2021-08-21 12:57:10,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6444 to 4591. [2021-08-21 12:57:10,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4591 states, 4590 states have (on average 3.7444444444444445) internal successors, (17187), 4590 states have internal predecessors, (17187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4591 states to 4591 states and 17187 transitions. [2021-08-21 12:57:10,908 INFO L78 Accepts]: Start accepts. Automaton has 4591 states and 17187 transitions. Word has length 31 [2021-08-21 12:57:10,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:10,908 INFO L470 AbstractCegarLoop]: Abstraction has 4591 states and 17187 transitions. [2021-08-21 12:57:10,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:10,908 INFO L276 IsEmpty]: Start isEmpty. Operand 4591 states and 17187 transitions. [2021-08-21 12:57:10,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:57:10,918 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:10,918 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:10,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:11,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:11,134 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:11,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:11,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1424343976, now seen corresponding path program 14 times [2021-08-21 12:57:11,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:11,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459039464] [2021-08-21 12:57:11,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:11,135 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:12,669 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 12:57:12,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:12,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459039464] [2021-08-21 12:57:12,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459039464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:12,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329369502] [2021-08-21 12:57:12,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:57:12,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:12,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:12,681 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:12,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 12:57:12,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:57:12,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:12,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:57:12,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:14,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:57:14,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:57:14,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:57:14,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:57:14,345 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 153 [2021-08-21 12:57:14,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:57:14,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:57:14,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:57:14,350 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 122 [2021-08-21 12:57:14,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2021-08-21 12:57:15,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 70 [2021-08-21 12:57:15,209 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 12:57:15,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329369502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:15,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:15,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2021-08-21 12:57:15,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850396641] [2021-08-21 12:57:15,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:57:15,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:15,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:57:15,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:57:15,210 INFO L87 Difference]: Start difference. First operand 4591 states and 17187 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:16,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:16,380 INFO L93 Difference]: Finished difference Result 7254 states and 26374 transitions. [2021-08-21 12:57:16,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:57:16,380 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:57:16,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:16,396 INFO L225 Difference]: With dead ends: 7254 [2021-08-21 12:57:16,396 INFO L226 Difference]: Without dead ends: 7141 [2021-08-21 12:57:16,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1110.3ms TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:57:16,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7141 states. [2021-08-21 12:57:16,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7141 to 4923. [2021-08-21 12:57:16,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4923 states, 4922 states have (on average 3.7230800487606666) internal successors, (18325), 4922 states have internal predecessors, (18325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:16,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4923 states to 4923 states and 18325 transitions. [2021-08-21 12:57:16,498 INFO L78 Accepts]: Start accepts. Automaton has 4923 states and 18325 transitions. Word has length 33 [2021-08-21 12:57:16,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:16,498 INFO L470 AbstractCegarLoop]: Abstraction has 4923 states and 18325 transitions. [2021-08-21 12:57:16,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:16,498 INFO L276 IsEmpty]: Start isEmpty. Operand 4923 states and 18325 transitions. [2021-08-21 12:57:16,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:57:16,508 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:16,508 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:16,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:16,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:16,721 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:16,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:16,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1674310878, now seen corresponding path program 15 times [2021-08-21 12:57:16,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:16,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725560312] [2021-08-21 12:57:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:16,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:17,432 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 12:57:17,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:17,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725560312] [2021-08-21 12:57:17,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725560312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:17,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399806182] [2021-08-21 12:57:17,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:57:17,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:17,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:17,433 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:17,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 12:57:17,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:57:17,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:17,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:57:17,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:18,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:57:19,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 139 [2021-08-21 12:57:19,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 114 [2021-08-21 12:57:19,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 108 [2021-08-21 12:57:20,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:57:20,454 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 108 treesize of output 94 [2021-08-21 12:57:20,702 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 12:57:20,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399806182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:20,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:20,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-08-21 12:57:20,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410887620] [2021-08-21 12:57:20,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:57:20,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:20,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:57:20,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:57:20,704 INFO L87 Difference]: Start difference. First operand 4923 states and 18325 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:22,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:22,503 INFO L93 Difference]: Finished difference Result 7367 states and 26562 transitions. [2021-08-21 12:57:22,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:57:22,504 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:57:22,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:22,518 INFO L225 Difference]: With dead ends: 7367 [2021-08-21 12:57:22,518 INFO L226 Difference]: Without dead ends: 7209 [2021-08-21 12:57:22,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1538.3ms TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:57:22,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7209 states. [2021-08-21 12:57:22,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7209 to 4977. [2021-08-21 12:57:22,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4977 states, 4976 states have (on average 3.7206591639871385) internal successors, (18514), 4976 states have internal predecessors, (18514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:22,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4977 states to 4977 states and 18514 transitions. [2021-08-21 12:57:22,617 INFO L78 Accepts]: Start accepts. Automaton has 4977 states and 18514 transitions. Word has length 33 [2021-08-21 12:57:22,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:22,618 INFO L470 AbstractCegarLoop]: Abstraction has 4977 states and 18514 transitions. [2021-08-21 12:57:22,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:22,618 INFO L276 IsEmpty]: Start isEmpty. Operand 4977 states and 18514 transitions. [2021-08-21 12:57:22,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:57:22,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:22,627 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:22,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:22,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:22,845 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:22,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:22,845 INFO L82 PathProgramCache]: Analyzing trace with hash -856978606, now seen corresponding path program 16 times [2021-08-21 12:57:22,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:22,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755299257] [2021-08-21 12:57:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:22,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:25,379 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 12:57:25,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:25,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755299257] [2021-08-21 12:57:25,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755299257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:25,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627450103] [2021-08-21 12:57:25,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:57:25,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:25,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:25,380 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:25,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 12:57:25,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:57:25,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:25,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:57:25,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:26,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:57:27,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 145 [2021-08-21 12:57:27,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 124 [2021-08-21 12:57:27,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 114 [2021-08-21 12:57:28,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 68 [2021-08-21 12:57:28,172 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 12:57:28,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627450103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:28,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:28,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-08-21 12:57:28,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588404610] [2021-08-21 12:57:28,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:57:28,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:28,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:57:28,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:57:28,174 INFO L87 Difference]: Start difference. First operand 4977 states and 18514 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:29,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:29,103 INFO L93 Difference]: Finished difference Result 7659 states and 27803 transitions. [2021-08-21 12:57:29,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:57:29,103 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:57:29,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:29,119 INFO L225 Difference]: With dead ends: 7659 [2021-08-21 12:57:29,119 INFO L226 Difference]: Without dead ends: 7607 [2021-08-21 12:57:29,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 941.0ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:57:29,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7607 states. [2021-08-21 12:57:29,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7607 to 4959. [2021-08-21 12:57:29,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4959 states, 4958 states have (on average 3.721460266236386) internal successors, (18451), 4958 states have internal predecessors, (18451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:29,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4959 states to 4959 states and 18451 transitions. [2021-08-21 12:57:29,216 INFO L78 Accepts]: Start accepts. Automaton has 4959 states and 18451 transitions. Word has length 33 [2021-08-21 12:57:29,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:29,217 INFO L470 AbstractCegarLoop]: Abstraction has 4959 states and 18451 transitions. [2021-08-21 12:57:29,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:29,217 INFO L276 IsEmpty]: Start isEmpty. Operand 4959 states and 18451 transitions. [2021-08-21 12:57:29,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:57:29,225 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:29,226 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:29,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:29,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:29,441 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:29,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:29,441 INFO L82 PathProgramCache]: Analyzing trace with hash -720009752, now seen corresponding path program 17 times [2021-08-21 12:57:29,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:29,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362001567] [2021-08-21 12:57:29,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:29,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:29,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:29,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:29,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362001567] [2021-08-21 12:57:29,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362001567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:29,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111289135] [2021-08-21 12:57:29,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:57:29,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:29,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:29,471 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:29,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 12:57:30,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:57:30,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:30,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:57:30,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:57:30,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111289135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:30,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:30,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 12:57:30,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237520944] [2021-08-21 12:57:30,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:57:30,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:30,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:57:30,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:57:30,320 INFO L87 Difference]: Start difference. First operand 4959 states and 18451 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:30,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:30,393 INFO L93 Difference]: Finished difference Result 7219 states and 26022 transitions. [2021-08-21 12:57:30,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:57:30,394 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 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 33 [2021-08-21 12:57:30,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:30,412 INFO L225 Difference]: With dead ends: 7219 [2021-08-21 12:57:30,412 INFO L226 Difference]: Without dead ends: 7001 [2021-08-21 12:57:30,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:57:30,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7001 states. [2021-08-21 12:57:30,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7001 to 6117. [2021-08-21 12:57:30,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6117 states, 6116 states have (on average 3.589764551994768) internal successors, (21955), 6116 states have internal predecessors, (21955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:30,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6117 states to 6117 states and 21955 transitions. [2021-08-21 12:57:30,518 INFO L78 Accepts]: Start accepts. Automaton has 6117 states and 21955 transitions. Word has length 33 [2021-08-21 12:57:30,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:30,518 INFO L470 AbstractCegarLoop]: Abstraction has 6117 states and 21955 transitions. [2021-08-21 12:57:30,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:30,518 INFO L276 IsEmpty]: Start isEmpty. Operand 6117 states and 21955 transitions. [2021-08-21 12:57:30,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:57:30,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:30,529 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:30,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:30,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:30,745 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:30,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:30,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1696023130, now seen corresponding path program 18 times [2021-08-21 12:57:30,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:30,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333593347] [2021-08-21 12:57:30,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:30,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:30,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:31,618 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 12:57:31,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:31,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333593347] [2021-08-21 12:57:31,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333593347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:31,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603993145] [2021-08-21 12:57:31,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:57:31,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:31,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:31,619 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:31,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 12:57:32,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:57:32,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:32,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:57:32,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:32,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:57:33,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 144 [2021-08-21 12:57:33,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 117 [2021-08-21 12:57:33,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 111 [2021-08-21 12:57:34,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 67 [2021-08-21 12:57:34,115 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 12:57:34,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603993145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:34,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:34,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2021-08-21 12:57:34,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575056393] [2021-08-21 12:57:34,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:57:34,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:34,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:57:34,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:57:34,116 INFO L87 Difference]: Start difference. First operand 6117 states and 21955 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:35,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:35,163 INFO L93 Difference]: Finished difference Result 10100 states and 35249 transitions. [2021-08-21 12:57:35,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:57:35,164 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:57:35,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:35,187 INFO L225 Difference]: With dead ends: 10100 [2021-08-21 12:57:35,187 INFO L226 Difference]: Without dead ends: 9915 [2021-08-21 12:57:35,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 897.1ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:57:35,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9915 states. [2021-08-21 12:57:35,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9915 to 6214. [2021-08-21 12:57:35,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6214 states, 6213 states have (on average 3.585063576372123) internal successors, (22274), 6213 states have internal predecessors, (22274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 22274 transitions. [2021-08-21 12:57:35,316 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 22274 transitions. Word has length 33 [2021-08-21 12:57:35,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:35,316 INFO L470 AbstractCegarLoop]: Abstraction has 6214 states and 22274 transitions. [2021-08-21 12:57:35,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:35,316 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 22274 transitions. [2021-08-21 12:57:35,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:57:35,326 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:35,326 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:35,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:35,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:35,541 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:35,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:35,541 INFO L82 PathProgramCache]: Analyzing trace with hash -499710688, now seen corresponding path program 19 times [2021-08-21 12:57:35,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:35,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344230434] [2021-08-21 12:57:35,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:35,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:36,674 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 12:57:36,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:36,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344230434] [2021-08-21 12:57:36,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344230434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:36,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347683770] [2021-08-21 12:57:36,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:57:36,674 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:36,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:36,675 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:36,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 12:57:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:37,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 12:57:37,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:37,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:57:38,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 139 [2021-08-21 12:57:38,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 118 [2021-08-21 12:57:38,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 110 [2021-08-21 12:57:39,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 70 [2021-08-21 12:57:39,586 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 12:57:39,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347683770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:39,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:39,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2021-08-21 12:57:39,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525716153] [2021-08-21 12:57:39,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:57:39,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:39,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:57:39,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:57:39,587 INFO L87 Difference]: Start difference. First operand 6214 states and 22274 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:40,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:40,477 INFO L93 Difference]: Finished difference Result 9974 states and 34827 transitions. [2021-08-21 12:57:40,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:57:40,478 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:57:40,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:40,499 INFO L225 Difference]: With dead ends: 9974 [2021-08-21 12:57:40,499 INFO L226 Difference]: Without dead ends: 9881 [2021-08-21 12:57:40,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 855.9ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:57:40,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9881 states. [2021-08-21 12:57:40,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9881 to 6222. [2021-08-21 12:57:40,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6222 states, 6221 states have (on average 3.583507474682527) internal successors, (22293), 6221 states have internal predecessors, (22293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:40,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 22293 transitions. [2021-08-21 12:57:40,613 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 22293 transitions. Word has length 33 [2021-08-21 12:57:40,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:40,613 INFO L470 AbstractCegarLoop]: Abstraction has 6222 states and 22293 transitions. [2021-08-21 12:57:40,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:40,613 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 22293 transitions. [2021-08-21 12:57:40,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:57:40,623 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:40,624 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:40,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:40,836 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,SelfDestructingSolverStorable24 [2021-08-21 12:57:40,837 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:40,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:40,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1488917818, now seen corresponding path program 20 times [2021-08-21 12:57:40,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:40,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444045394] [2021-08-21 12:57:40,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:40,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:42,158 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 12:57:42,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:42,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444045394] [2021-08-21 12:57:42,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444045394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:42,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706270229] [2021-08-21 12:57:42,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:57:42,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:42,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:42,159 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:42,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 12:57:43,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:57:43,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:43,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:57:43,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:43,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:57:43,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-08-21 12:57:43,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:57:43,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:57:43,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:57:43,717 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 117 [2021-08-21 12:57:43,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:57:43,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:57:43,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:57:43,722 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 95 [2021-08-21 12:57:44,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 68 [2021-08-21 12:57:44,717 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 12:57:44,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706270229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:44,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:44,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2021-08-21 12:57:44,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570654090] [2021-08-21 12:57:44,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:57:44,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:44,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:57:44,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:57:44,718 INFO L87 Difference]: Start difference. First operand 6222 states and 22293 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:46,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:46,804 INFO L93 Difference]: Finished difference Result 11464 states and 39919 transitions. [2021-08-21 12:57:46,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:57:46,804 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:57:46,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:46,828 INFO L225 Difference]: With dead ends: 11464 [2021-08-21 12:57:46,828 INFO L226 Difference]: Without dead ends: 11341 [2021-08-21 12:57:46,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1798.5ms TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:57:46,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11341 states. [2021-08-21 12:57:46,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11341 to 6306. [2021-08-21 12:57:46,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6306 states, 6305 states have (on average 3.5847739888977004) internal successors, (22602), 6305 states have internal predecessors, (22602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:46,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6306 states to 6306 states and 22602 transitions. [2021-08-21 12:57:46,963 INFO L78 Accepts]: Start accepts. Automaton has 6306 states and 22602 transitions. Word has length 33 [2021-08-21 12:57:46,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:46,963 INFO L470 AbstractCegarLoop]: Abstraction has 6306 states and 22602 transitions. [2021-08-21 12:57:46,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:46,963 INFO L276 IsEmpty]: Start isEmpty. Operand 6306 states and 22602 transitions. [2021-08-21 12:57:46,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:57:46,973 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:46,973 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:46,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:47,173 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,SelfDestructingSolverStorable25 [2021-08-21 12:57:47,174 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:47,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:47,174 INFO L82 PathProgramCache]: Analyzing trace with hash -817784198, now seen corresponding path program 21 times [2021-08-21 12:57:47,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:47,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644127200] [2021-08-21 12:57:47,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:47,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:48,005 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 12:57:48,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:48,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644127200] [2021-08-21 12:57:48,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644127200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:48,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698954692] [2021-08-21 12:57:48,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:57:48,006 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:48,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:48,009 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:48,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 12:57:49,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:57:49,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:49,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:57:49,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:49,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:57:49,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:57:49,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-21 12:57:50,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:57:50,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:57:50,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 120 [2021-08-21 12:57:50,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:57:50,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:57:50,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 104 [2021-08-21 12:57:50,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 71 [2021-08-21 12:57:51,022 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 12:57:51,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698954692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:51,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:51,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 12:57:51,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781604889] [2021-08-21 12:57:51,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:57:51,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:51,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:57:51,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:57:51,023 INFO L87 Difference]: Start difference. First operand 6306 states and 22602 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:52,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:52,326 INFO L93 Difference]: Finished difference Result 11068 states and 38551 transitions. [2021-08-21 12:57:52,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:57:52,326 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:57:52,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:52,348 INFO L225 Difference]: With dead ends: 11068 [2021-08-21 12:57:52,348 INFO L226 Difference]: Without dead ends: 10904 [2021-08-21 12:57:52,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1088.6ms TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:57:52,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10904 states. [2021-08-21 12:57:52,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10904 to 6420. [2021-08-21 12:57:52,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6420 states, 6419 states have (on average 3.579373734226515) internal successors, (22976), 6419 states have internal predecessors, (22976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:52,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6420 states to 6420 states and 22976 transitions. [2021-08-21 12:57:52,477 INFO L78 Accepts]: Start accepts. Automaton has 6420 states and 22976 transitions. Word has length 33 [2021-08-21 12:57:52,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:52,477 INFO L470 AbstractCegarLoop]: Abstraction has 6420 states and 22976 transitions. [2021-08-21 12:57:52,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:52,477 INFO L276 IsEmpty]: Start isEmpty. Operand 6420 states and 22976 transitions. [2021-08-21 12:57:52,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:57:52,487 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:52,487 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:52,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:52,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 12:57:52,693 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:52,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:52,693 INFO L82 PathProgramCache]: Analyzing trace with hash -784457146, now seen corresponding path program 22 times [2021-08-21 12:57:52,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:52,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783414871] [2021-08-21 12:57:52,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:52,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:54,210 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 12:57:54,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:54,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783414871] [2021-08-21 12:57:54,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783414871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:54,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909097087] [2021-08-21 12:57:54,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:57:54,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:54,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:54,211 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:54,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 12:57:55,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:57:55,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:55,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:57:55,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:55,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:57:55,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-08-21 12:57:56,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:57:56,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:57:56,441 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 47 [2021-08-21 12:57:56,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 99 [2021-08-21 12:57:56,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 77 [2021-08-21 12:57:56,704 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 12:57:56,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909097087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:56,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:56,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-08-21 12:57:56,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444154724] [2021-08-21 12:57:56,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:57:56,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:56,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:57:56,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:57:56,705 INFO L87 Difference]: Start difference. First operand 6420 states and 22976 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:58,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:58,703 INFO L93 Difference]: Finished difference Result 10639 states and 37219 transitions. [2021-08-21 12:57:58,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:57:58,703 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:57:58,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:58,725 INFO L225 Difference]: With dead ends: 10639 [2021-08-21 12:57:58,725 INFO L226 Difference]: Without dead ends: 10508 [2021-08-21 12:57:58,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1918.4ms TimeCoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:57:58,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10508 states. [2021-08-21 12:57:58,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10508 to 6446. [2021-08-21 12:57:58,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6446 states, 6445 states have (on average 3.5798293250581845) internal successors, (23072), 6445 states have internal predecessors, (23072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:58,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6446 states to 6446 states and 23072 transitions. [2021-08-21 12:57:58,860 INFO L78 Accepts]: Start accepts. Automaton has 6446 states and 23072 transitions. Word has length 33 [2021-08-21 12:57:58,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:58,861 INFO L470 AbstractCegarLoop]: Abstraction has 6446 states and 23072 transitions. [2021-08-21 12:57:58,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:58,861 INFO L276 IsEmpty]: Start isEmpty. Operand 6446 states and 23072 transitions. [2021-08-21 12:57:58,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:57:58,870 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:58,870 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:58,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:59,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:59,084 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:59,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:59,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1906539584, now seen corresponding path program 23 times [2021-08-21 12:57:59,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:59,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398805008] [2021-08-21 12:57:59,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:59,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:59,824 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 12:57:59,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:59,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398805008] [2021-08-21 12:57:59,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398805008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:59,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639989214] [2021-08-21 12:57:59,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:57:59,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:59,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:59,825 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:59,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 12:58:01,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:58:01,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:01,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:58:01,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:01,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:58:02,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:02,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 206 [2021-08-21 12:58:02,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:02,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:02,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 155 [2021-08-21 12:58:02,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:02,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:02,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 149 [2021-08-21 12:58:03,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 71 [2021-08-21 12:58:03,127 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 12:58:03,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639989214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:03,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:03,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-08-21 12:58:03,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597901072] [2021-08-21 12:58:03,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:58:03,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:03,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:58:03,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:58:03,128 INFO L87 Difference]: Start difference. First operand 6446 states and 23072 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:04,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:04,088 INFO L93 Difference]: Finished difference Result 9905 states and 34593 transitions. [2021-08-21 12:58:04,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:58:04,089 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:58:04,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:04,108 INFO L225 Difference]: With dead ends: 9905 [2021-08-21 12:58:04,108 INFO L226 Difference]: Without dead ends: 9812 [2021-08-21 12:58:04,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 939.1ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:58:04,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9812 states. [2021-08-21 12:58:04,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9812 to 6454. [2021-08-21 12:58:04,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6454 states, 6453 states have (on average 3.5786455911978923) internal successors, (23093), 6453 states have internal predecessors, (23093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:04,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6454 states to 6454 states and 23093 transitions. [2021-08-21 12:58:04,225 INFO L78 Accepts]: Start accepts. Automaton has 6454 states and 23093 transitions. Word has length 33 [2021-08-21 12:58:04,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:04,225 INFO L470 AbstractCegarLoop]: Abstraction has 6454 states and 23093 transitions. [2021-08-21 12:58:04,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:04,226 INFO L276 IsEmpty]: Start isEmpty. Operand 6454 states and 23093 transitions. [2021-08-21 12:58:04,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:58:04,235 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:04,235 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:04,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:04,435 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,SelfDestructingSolverStorable28 [2021-08-21 12:58:04,436 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:04,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:04,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1070034656, now seen corresponding path program 24 times [2021-08-21 12:58:04,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:04,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773293023] [2021-08-21 12:58:04,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:04,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:05,251 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 12:58:05,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:05,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773293023] [2021-08-21 12:58:05,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773293023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:05,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93242722] [2021-08-21 12:58:05,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:58:05,252 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:05,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:05,252 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:05,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 12:58:06,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:58:06,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:06,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:58:06,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:07,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:58:07,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:07,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-08-21 12:58:07,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:07,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:07,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 124 [2021-08-21 12:58:07,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:07,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:07,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 104 [2021-08-21 12:58:07,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2021-08-21 12:58:07,829 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 12:58:07,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93242722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:07,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:07,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-08-21 12:58:07,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301173327] [2021-08-21 12:58:07,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:58:07,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:07,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:58:07,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:58:07,830 INFO L87 Difference]: Start difference. First operand 6454 states and 23093 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:09,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:09,379 INFO L93 Difference]: Finished difference Result 11871 states and 41299 transitions. [2021-08-21 12:58:09,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:58:09,380 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:58:09,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:09,405 INFO L225 Difference]: With dead ends: 11871 [2021-08-21 12:58:09,405 INFO L226 Difference]: Without dead ends: 11782 [2021-08-21 12:58:09,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1331.2ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:58:09,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11782 states. [2021-08-21 12:58:09,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11782 to 6485. [2021-08-21 12:58:09,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6485 states, 6484 states have (on average 3.575570635410241) internal successors, (23184), 6484 states have internal predecessors, (23184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:09,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6485 states to 6485 states and 23184 transitions. [2021-08-21 12:58:09,542 INFO L78 Accepts]: Start accepts. Automaton has 6485 states and 23184 transitions. Word has length 33 [2021-08-21 12:58:09,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:09,542 INFO L470 AbstractCegarLoop]: Abstraction has 6485 states and 23184 transitions. [2021-08-21 12:58:09,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:09,542 INFO L276 IsEmpty]: Start isEmpty. Operand 6485 states and 23184 transitions. [2021-08-21 12:58:09,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:58:09,551 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:09,551 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:09,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:09,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:09,752 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:09,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:09,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1472723884, now seen corresponding path program 25 times [2021-08-21 12:58:09,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:09,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756203581] [2021-08-21 12:58:09,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:09,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:10,733 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 12:58:10,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:10,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756203581] [2021-08-21 12:58:10,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756203581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:10,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211962898] [2021-08-21 12:58:10,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:58:10,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:10,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:10,734 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:10,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 12:58:12,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:12,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:58:12,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:12,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:58:12,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:58:12,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:12,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-08-21 12:58:13,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:13,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 51 [2021-08-21 12:58:13,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 99 [2021-08-21 12:58:13,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 77 [2021-08-21 12:58:13,455 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 12:58:13,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211962898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:13,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:13,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-08-21 12:58:13,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079984273] [2021-08-21 12:58:13,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:58:13,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:13,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:58:13,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:58:13,457 INFO L87 Difference]: Start difference. First operand 6485 states and 23184 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:14,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:14,681 INFO L93 Difference]: Finished difference Result 10295 states and 36023 transitions. [2021-08-21 12:58:14,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:58:14,682 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:58:14,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:14,703 INFO L225 Difference]: With dead ends: 10295 [2021-08-21 12:58:14,703 INFO L226 Difference]: Without dead ends: 10223 [2021-08-21 12:58:14,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1142.8ms TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:58:14,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10223 states. [2021-08-21 12:58:14,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10223 to 6477. [2021-08-21 12:58:14,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6477 states, 6476 states have (on average 3.5773625694873377) internal successors, (23167), 6476 states have internal predecessors, (23167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:14,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6477 states to 6477 states and 23167 transitions. [2021-08-21 12:58:14,818 INFO L78 Accepts]: Start accepts. Automaton has 6477 states and 23167 transitions. Word has length 33 [2021-08-21 12:58:14,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:14,819 INFO L470 AbstractCegarLoop]: Abstraction has 6477 states and 23167 transitions. [2021-08-21 12:58:14,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:14,819 INFO L276 IsEmpty]: Start isEmpty. Operand 6477 states and 23167 transitions. [2021-08-21 12:58:14,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:58:14,827 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:14,827 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:14,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:15,032 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,SelfDestructingSolverStorable30 [2021-08-21 12:58:15,033 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:15,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:15,033 INFO L82 PathProgramCache]: Analyzing trace with hash 889067426, now seen corresponding path program 26 times [2021-08-21 12:58:15,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:15,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965265782] [2021-08-21 12:58:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:15,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:16,334 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 12:58:16,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:16,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965265782] [2021-08-21 12:58:16,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965265782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:16,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179639263] [2021-08-21 12:58:16,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:58:16,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:16,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:16,335 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:16,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 12:58:17,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:58:17,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:17,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:58:17,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:18,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:58:19,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 141 [2021-08-21 12:58:19,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 125 [2021-08-21 12:58:19,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 117 [2021-08-21 12:58:19,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 70 [2021-08-21 12:58:19,735 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 12:58:19,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179639263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:19,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:19,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 12:58:19,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79024913] [2021-08-21 12:58:19,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:58:19,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:19,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:58:19,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:58:19,737 INFO L87 Difference]: Start difference. First operand 6477 states and 23167 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:22,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:22,354 INFO L93 Difference]: Finished difference Result 9866 states and 33629 transitions. [2021-08-21 12:58:22,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:58:22,354 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:58:22,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:22,377 INFO L225 Difference]: With dead ends: 9866 [2021-08-21 12:58:22,377 INFO L226 Difference]: Without dead ends: 9796 [2021-08-21 12:58:22,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 2275.6ms TimeCoverageRelationStatistics Valid=387, Invalid=1965, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:58:22,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9796 states. [2021-08-21 12:58:22,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9796 to 6659. [2021-08-21 12:58:22,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6659 states, 6658 states have (on average 3.57179333133073) internal successors, (23781), 6658 states have internal predecessors, (23781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:22,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6659 states to 6659 states and 23781 transitions. [2021-08-21 12:58:22,509 INFO L78 Accepts]: Start accepts. Automaton has 6659 states and 23781 transitions. Word has length 33 [2021-08-21 12:58:22,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:22,509 INFO L470 AbstractCegarLoop]: Abstraction has 6659 states and 23781 transitions. [2021-08-21 12:58:22,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:22,509 INFO L276 IsEmpty]: Start isEmpty. Operand 6659 states and 23781 transitions. [2021-08-21 12:58:22,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:58:22,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:22,519 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:22,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:22,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:22,727 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:22,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:22,727 INFO L82 PathProgramCache]: Analyzing trace with hash 2085379868, now seen corresponding path program 27 times [2021-08-21 12:58:22,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:22,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487738569] [2021-08-21 12:58:22,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:22,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:24,153 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 12:58:24,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:24,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487738569] [2021-08-21 12:58:24,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487738569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:24,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92203921] [2021-08-21 12:58:24,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:58:24,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:24,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:24,155 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:24,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 12:58:25,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:58:25,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:25,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:58:25,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:26,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:58:27,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:58:27,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 182 [2021-08-21 12:58:27,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 143 [2021-08-21 12:58:27,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 149 [2021-08-21 12:58:27,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 71 [2021-08-21 12:58:28,034 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 12:58:28,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92203921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:28,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:28,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-08-21 12:58:28,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230175157] [2021-08-21 12:58:28,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:58:28,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:28,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:58:28,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:58:28,036 INFO L87 Difference]: Start difference. First operand 6659 states and 23781 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:31,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:31,552 INFO L93 Difference]: Finished difference Result 9759 states and 33287 transitions. [2021-08-21 12:58:31,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 12:58:31,553 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 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 33 [2021-08-21 12:58:31,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:31,572 INFO L225 Difference]: With dead ends: 9759 [2021-08-21 12:58:31,572 INFO L226 Difference]: Without dead ends: 9594 [2021-08-21 12:58:31,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 2981.6ms TimeCoverageRelationStatistics Valid=438, Invalid=2532, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 12:58:31,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9594 states. [2021-08-21 12:58:31,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9594 to 6676. [2021-08-21 12:58:31,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6676 states, 6675 states have (on average 3.5733333333333333) internal successors, (23852), 6675 states have internal predecessors, (23852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:31,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6676 states to 6676 states and 23852 transitions. [2021-08-21 12:58:31,694 INFO L78 Accepts]: Start accepts. Automaton has 6676 states and 23852 transitions. Word has length 33 [2021-08-21 12:58:31,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:31,694 INFO L470 AbstractCegarLoop]: Abstraction has 6676 states and 23852 transitions. [2021-08-21 12:58:31,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:31,695 INFO L276 IsEmpty]: Start isEmpty. Operand 6676 states and 23852 transitions. [2021-08-21 12:58:31,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:58:31,705 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:31,705 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:31,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:31,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:31,917 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:31,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:31,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1096172738, now seen corresponding path program 28 times [2021-08-21 12:58:31,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:31,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633769541] [2021-08-21 12:58:31,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:31,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:32,516 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 12:58:32,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:32,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633769541] [2021-08-21 12:58:32,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633769541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:32,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440798185] [2021-08-21 12:58:32,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:58:32,517 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:32,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:32,517 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:32,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 12:58:34,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:58:34,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:34,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:58:34,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:34,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:58:34,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:34,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-21 12:58:34,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:34,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:34,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 114 [2021-08-21 12:58:34,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:34,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:34,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 97 [2021-08-21 12:58:35,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 70 [2021-08-21 12:58:35,910 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 12:58:35,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440798185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:35,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:35,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 12:58:35,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206717781] [2021-08-21 12:58:35,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:58:35,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:35,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:58:35,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:58:35,912 INFO L87 Difference]: Start difference. First operand 6676 states and 23852 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:38,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:38,312 INFO L93 Difference]: Finished difference Result 10387 states and 36288 transitions. [2021-08-21 12:58:38,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 12:58:38,313 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:58:38,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:38,335 INFO L225 Difference]: With dead ends: 10387 [2021-08-21 12:58:38,335 INFO L226 Difference]: Without dead ends: 10294 [2021-08-21 12:58:38,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 2153.7ms TimeCoverageRelationStatistics Valid=335, Invalid=1735, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 12:58:38,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10294 states. [2021-08-21 12:58:38,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10294 to 6744. [2021-08-21 12:58:38,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6744 states, 6743 states have (on average 3.5734836126353255) internal successors, (24096), 6743 states have internal predecessors, (24096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:38,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6744 states to 6744 states and 24096 transitions. [2021-08-21 12:58:38,481 INFO L78 Accepts]: Start accepts. Automaton has 6744 states and 24096 transitions. Word has length 33 [2021-08-21 12:58:38,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:38,481 INFO L470 AbstractCegarLoop]: Abstraction has 6744 states and 24096 transitions. [2021-08-21 12:58:38,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:38,481 INFO L276 IsEmpty]: Start isEmpty. Operand 6744 states and 24096 transitions. [2021-08-21 12:58:38,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:58:38,491 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:38,491 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:38,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:38,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:38,709 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:38,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:38,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1767306358, now seen corresponding path program 29 times [2021-08-21 12:58:38,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:38,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782227035] [2021-08-21 12:58:38,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:38,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:39,113 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 12:58:39,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:39,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782227035] [2021-08-21 12:58:39,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782227035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:39,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61366015] [2021-08-21 12:58:39,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:58:39,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:39,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:39,115 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:39,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 12:58:41,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:58:41,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:41,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 12:58:41,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:41,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:58:41,629 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-08-21 12:58:41,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2021-08-21 12:58:42,136 INFO L354 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2021-08-21 12:58:42,137 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 148 treesize of output 162 [2021-08-21 12:58:42,177 INFO L354 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2021-08-21 12:58:42,177 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 188 treesize of output 194 [2021-08-21 12:58:47,009 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-08-21 12:58:47,010 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 124 treesize of output 88 [2021-08-21 12:58:47,054 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 12:58:47,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61366015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:47,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:47,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-21 12:58:47,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891469265] [2021-08-21 12:58:47,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:58:47,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:47,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:58:47,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:58:47,055 INFO L87 Difference]: Start difference. First operand 6744 states and 24096 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:48,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:48,139 INFO L93 Difference]: Finished difference Result 9429 states and 32962 transitions. [2021-08-21 12:58:48,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:58:48,139 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:58:48,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:48,160 INFO L225 Difference]: With dead ends: 9429 [2021-08-21 12:58:48,160 INFO L226 Difference]: Without dead ends: 9042 [2021-08-21 12:58:48,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 830.7ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:58:48,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9042 states. [2021-08-21 12:58:48,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9042 to 6968. [2021-08-21 12:58:48,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6968 states, 6967 states have (on average 3.5616477680493754) internal successors, (24814), 6967 states have internal predecessors, (24814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:48,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6968 states to 6968 states and 24814 transitions. [2021-08-21 12:58:48,279 INFO L78 Accepts]: Start accepts. Automaton has 6968 states and 24814 transitions. Word has length 33 [2021-08-21 12:58:48,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:48,279 INFO L470 AbstractCegarLoop]: Abstraction has 6968 states and 24814 transitions. [2021-08-21 12:58:48,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:48,279 INFO L276 IsEmpty]: Start isEmpty. Operand 6968 states and 24814 transitions. [2021-08-21 12:58:48,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:58:48,316 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:48,316 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:48,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:48,521 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,SelfDestructingSolverStorable34 [2021-08-21 12:58:48,521 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:48,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:48,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1800633410, now seen corresponding path program 30 times [2021-08-21 12:58:48,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:48,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132487683] [2021-08-21 12:58:48,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:48,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:48,862 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 12:58:48,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:48,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132487683] [2021-08-21 12:58:48,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132487683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:48,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166277078] [2021-08-21 12:58:48,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:58:48,862 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:48,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:48,863 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:48,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 12:58:51,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:58:51,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:51,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:58:51,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:51,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:58:51,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:51,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-21 12:58:52,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:52,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:58:52,074 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 75 treesize of output 77 [2021-08-21 12:58:52,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 131 [2021-08-21 12:58:52,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 107 [2021-08-21 12:58:52,705 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 12:58:52,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166277078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:52,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:52,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 24 [2021-08-21 12:58:52,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222798176] [2021-08-21 12:58:52,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:58:52,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:52,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:58:52,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:58:52,706 INFO L87 Difference]: Start difference. First operand 6968 states and 24814 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:53,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:53,847 INFO L93 Difference]: Finished difference Result 9552 states and 33141 transitions. [2021-08-21 12:58:53,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:58:53,847 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:58:53,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:53,866 INFO L225 Difference]: With dead ends: 9552 [2021-08-21 12:58:53,867 INFO L226 Difference]: Without dead ends: 9344 [2021-08-21 12:58:53,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 976.1ms TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:58:53,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9344 states. [2021-08-21 12:58:53,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9344 to 6987. [2021-08-21 12:58:53,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6987 states, 6986 states have (on average 3.5658459776696247) internal successors, (24911), 6986 states have internal predecessors, (24911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:53,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6987 states to 6987 states and 24911 transitions. [2021-08-21 12:58:53,977 INFO L78 Accepts]: Start accepts. Automaton has 6987 states and 24911 transitions. Word has length 33 [2021-08-21 12:58:53,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:53,977 INFO L470 AbstractCegarLoop]: Abstraction has 6987 states and 24911 transitions. [2021-08-21 12:58:53,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:53,977 INFO L276 IsEmpty]: Start isEmpty. Operand 6987 states and 24911 transitions. [2021-08-21 12:58:53,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:58:53,987 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:53,987 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:54,011 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 12:58:54,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 12:58:54,188 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:54,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:54,188 INFO L82 PathProgramCache]: Analyzing trace with hash 678550972, now seen corresponding path program 31 times [2021-08-21 12:58:54,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:54,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285164576] [2021-08-21 12:58:54,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:54,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:55,606 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 12:58:55,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:55,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285164576] [2021-08-21 12:58:55,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285164576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:55,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544974342] [2021-08-21 12:58:55,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:58:55,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:55,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:55,613 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:55,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 12:58:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:57,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:58:57,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:57,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:58:59,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:59,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:59,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 219 treesize of output 165 [2021-08-21 12:58:59,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:59,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:59,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 138 [2021-08-21 12:58:59,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:59,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 116 [2021-08-21 12:58:59,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 71 [2021-08-21 12:58:59,767 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 12:58:59,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544974342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:59,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:59,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-08-21 12:58:59,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172745153] [2021-08-21 12:58:59,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:58:59,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:59,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:58:59,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:58:59,769 INFO L87 Difference]: Start difference. First operand 6987 states and 24911 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:02,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:02,104 INFO L93 Difference]: Finished difference Result 11650 states and 40415 transitions. [2021-08-21 12:59:02,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 12:59:02,104 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 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 33 [2021-08-21 12:59:02,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:02,129 INFO L225 Difference]: With dead ends: 11650 [2021-08-21 12:59:02,130 INFO L226 Difference]: Without dead ends: 11490 [2021-08-21 12:59:02,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1915.8ms TimeCoverageRelationStatistics Valid=343, Invalid=1727, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 12:59:02,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11490 states. [2021-08-21 12:59:02,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11490 to 7146. [2021-08-21 12:59:02,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7146 states, 7145 states have (on average 3.5584324702589223) internal successors, (25425), 7145 states have internal predecessors, (25425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:02,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7146 states to 7146 states and 25425 transitions. [2021-08-21 12:59:02,263 INFO L78 Accepts]: Start accepts. Automaton has 7146 states and 25425 transitions. Word has length 33 [2021-08-21 12:59:02,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:02,263 INFO L470 AbstractCegarLoop]: Abstraction has 7146 states and 25425 transitions. [2021-08-21 12:59:02,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:02,263 INFO L276 IsEmpty]: Start isEmpty. Operand 7146 states and 25425 transitions. [2021-08-21 12:59:02,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:59:02,274 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:02,274 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:02,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:02,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:02,475 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:02,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:02,475 INFO L82 PathProgramCache]: Analyzing trace with hash -122321982, now seen corresponding path program 32 times [2021-08-21 12:59:02,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:02,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931539215] [2021-08-21 12:59:02,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:02,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:03,031 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 12:59:03,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:03,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931539215] [2021-08-21 12:59:03,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931539215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:03,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185297885] [2021-08-21 12:59:03,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:59:03,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:03,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:03,033 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:03,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 12:59:05,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:59:05,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:05,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:59:05,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:05,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:59:05,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:05,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-21 12:59:05,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:05,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:05,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 114 [2021-08-21 12:59:05,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:05,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:05,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 97 [2021-08-21 12:59:06,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2021-08-21 12:59:06,310 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 12:59:06,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185297885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:06,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:06,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 12:59:06,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306662146] [2021-08-21 12:59:06,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:59:06,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:06,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:59:06,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:59:06,311 INFO L87 Difference]: Start difference. First operand 7146 states and 25425 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:07,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:07,401 INFO L93 Difference]: Finished difference Result 10863 states and 37929 transitions. [2021-08-21 12:59:07,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:59:07,402 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:59:07,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:07,423 INFO L225 Difference]: With dead ends: 10863 [2021-08-21 12:59:07,424 INFO L226 Difference]: Without dead ends: 10770 [2021-08-21 12:59:07,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 859.3ms TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:59:07,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10770 states. [2021-08-21 12:59:07,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10770 to 7162. [2021-08-21 12:59:07,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7162 states, 7161 states have (on average 3.5566261695293955) internal successors, (25469), 7161 states have internal predecessors, (25469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:07,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7162 states to 7162 states and 25469 transitions. [2021-08-21 12:59:07,551 INFO L78 Accepts]: Start accepts. Automaton has 7162 states and 25469 transitions. Word has length 33 [2021-08-21 12:59:07,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:07,551 INFO L470 AbstractCegarLoop]: Abstraction has 7162 states and 25469 transitions. [2021-08-21 12:59:07,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:07,551 INFO L276 IsEmpty]: Start isEmpty. Operand 7162 states and 25469 transitions. [2021-08-21 12:59:07,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:59:07,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:07,561 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:07,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:07,761 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,SelfDestructingSolverStorable37 [2021-08-21 12:59:07,762 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:07,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:07,762 INFO L82 PathProgramCache]: Analyzing trace with hash 548811638, now seen corresponding path program 33 times [2021-08-21 12:59:07,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:07,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006146911] [2021-08-21 12:59:07,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:07,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:08,220 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 12:59:08,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:08,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006146911] [2021-08-21 12:59:08,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006146911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:08,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738348642] [2021-08-21 12:59:08,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:59:08,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:08,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:08,222 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:08,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 12:59:10,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:59:10,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:10,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:59:10,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:10,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:59:10,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:10,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-21 12:59:11,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2021-08-21 12:59:11,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 96 [2021-08-21 12:59:12,296 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 12:59:12,296 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 106 treesize of output 79 [2021-08-21 12:59:12,336 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 12:59:12,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738348642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:12,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:12,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-21 12:59:12,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122913271] [2021-08-21 12:59:12,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:59:12,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:12,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:59:12,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:59:12,337 INFO L87 Difference]: Start difference. First operand 7162 states and 25469 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:13,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:13,614 INFO L93 Difference]: Finished difference Result 11420 states and 39488 transitions. [2021-08-21 12:59:13,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:59:13,614 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:59:13,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:13,636 INFO L225 Difference]: With dead ends: 11420 [2021-08-21 12:59:13,637 INFO L226 Difference]: Without dead ends: 11126 [2021-08-21 12:59:13,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1184.3ms TimeCoverageRelationStatistics Valid=297, Invalid=1595, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 12:59:13,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11126 states. [2021-08-21 12:59:13,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11126 to 7396. [2021-08-21 12:59:13,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7396 states, 7395 states have (on average 3.547126436781609) internal successors, (26231), 7395 states have internal predecessors, (26231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:13,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7396 states to 7396 states and 26231 transitions. [2021-08-21 12:59:13,779 INFO L78 Accepts]: Start accepts. Automaton has 7396 states and 26231 transitions. Word has length 33 [2021-08-21 12:59:13,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:13,779 INFO L470 AbstractCegarLoop]: Abstraction has 7396 states and 26231 transitions. [2021-08-21 12:59:13,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:13,779 INFO L276 IsEmpty]: Start isEmpty. Operand 7396 states and 26231 transitions. [2021-08-21 12:59:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:59:13,790 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:13,790 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:13,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:13,990 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,SelfDestructingSolverStorable38 [2021-08-21 12:59:13,990 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:13,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:13,991 INFO L82 PathProgramCache]: Analyzing trace with hash 582138690, now seen corresponding path program 34 times [2021-08-21 12:59:13,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:13,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111043729] [2021-08-21 12:59:13,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:13,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:14,551 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 12:59:14,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:14,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111043729] [2021-08-21 12:59:14,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111043729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:14,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376120912] [2021-08-21 12:59:14,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:59:14,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:14,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:14,552 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:14,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 12:59:17,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:59:17,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:17,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:59:17,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:17,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:59:17,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:17,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-21 12:59:17,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2021-08-21 12:59:18,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 101 [2021-08-21 12:59:18,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 77 [2021-08-21 12:59:18,133 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 12:59:18,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376120912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:18,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:18,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 12:59:18,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004518668] [2021-08-21 12:59:18,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:59:18,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:18,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:59:18,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:59:18,134 INFO L87 Difference]: Start difference. First operand 7396 states and 26231 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:18,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:18,734 INFO L93 Difference]: Finished difference Result 10775 states and 37657 transitions. [2021-08-21 12:59:18,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:59:18,735 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 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 33 [2021-08-21 12:59:18,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:18,757 INFO L225 Difference]: With dead ends: 10775 [2021-08-21 12:59:18,758 INFO L226 Difference]: Without dead ends: 10652 [2021-08-21 12:59:18,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 562.4ms TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:59:18,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10652 states. [2021-08-21 12:59:18,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10652 to 7440. [2021-08-21 12:59:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7440 states, 7439 states have (on average 3.5498050813281354) internal successors, (26407), 7439 states have internal predecessors, (26407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:18,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7440 states to 7440 states and 26407 transitions. [2021-08-21 12:59:18,889 INFO L78 Accepts]: Start accepts. Automaton has 7440 states and 26407 transitions. Word has length 33 [2021-08-21 12:59:18,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:18,889 INFO L470 AbstractCegarLoop]: Abstraction has 7440 states and 26407 transitions. [2021-08-21 12:59:18,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:18,889 INFO L276 IsEmpty]: Start isEmpty. Operand 7440 states and 26407 transitions. [2021-08-21 12:59:18,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:59:18,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:18,900 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:18,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:19,100 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,SelfDestructingSolverStorable39 [2021-08-21 12:59:19,101 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:19,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:19,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1358355248, now seen corresponding path program 35 times [2021-08-21 12:59:19,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:19,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395861013] [2021-08-21 12:59:19,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:19,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:19,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:19,533 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 12:59:19,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:19,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395861013] [2021-08-21 12:59:19,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395861013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:19,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657793843] [2021-08-21 12:59:19,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:59:19,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:19,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:19,534 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:19,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 12:59:22,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:59:22,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:22,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:59:22,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:22,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:59:22,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:22,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-21 12:59:22,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:22,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:22,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 122 [2021-08-21 12:59:22,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:22,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:22,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 104 [2021-08-21 12:59:23,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2021-08-21 12:59:23,042 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 12:59:23,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657793843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:23,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:23,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 12:59:23,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922242102] [2021-08-21 12:59:23,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:59:23,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:23,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:59:23,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:59:23,044 INFO L87 Difference]: Start difference. First operand 7440 states and 26407 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:23,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:23,730 INFO L93 Difference]: Finished difference Result 13223 states and 45936 transitions. [2021-08-21 12:59:23,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:59:23,731 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 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 33 [2021-08-21 12:59:23,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:23,759 INFO L225 Difference]: With dead ends: 13223 [2021-08-21 12:59:23,760 INFO L226 Difference]: Without dead ends: 13057 [2021-08-21 12:59:23,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 609.9ms TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:59:23,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13057 states. [2021-08-21 12:59:23,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13057 to 7253. [2021-08-21 12:59:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7253 states, 7252 states have (on average 3.558742415885273) internal successors, (25808), 7252 states have internal predecessors, (25808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:23,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7253 states to 7253 states and 25808 transitions. [2021-08-21 12:59:23,900 INFO L78 Accepts]: Start accepts. Automaton has 7253 states and 25808 transitions. Word has length 33 [2021-08-21 12:59:23,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:23,900 INFO L470 AbstractCegarLoop]: Abstraction has 7253 states and 25808 transitions. [2021-08-21 12:59:23,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:23,900 INFO L276 IsEmpty]: Start isEmpty. Operand 7253 states and 25808 transitions. [2021-08-21 12:59:23,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:59:23,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:23,911 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:23,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:24,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:24,111 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:24,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:24,111 INFO L82 PathProgramCache]: Analyzing trace with hash -676173446, now seen corresponding path program 36 times [2021-08-21 12:59:24,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:24,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690806124] [2021-08-21 12:59:24,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:24,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:24,578 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 12:59:24,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:24,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690806124] [2021-08-21 12:59:24,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690806124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:24,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315392802] [2021-08-21 12:59:24,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:59:24,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:24,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:24,592 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:24,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 12:59:27,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:59:27,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:27,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:59:27,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:27,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:59:27,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:27,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-21 12:59:27,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:27,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:27,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 122 [2021-08-21 12:59:27,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:27,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:27,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 104 [2021-08-21 12:59:28,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 70 [2021-08-21 12:59:28,662 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 12:59:28,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315392802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:28,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:28,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 12:59:28,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084268008] [2021-08-21 12:59:28,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:59:28,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:28,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:59:28,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:59:28,663 INFO L87 Difference]: Start difference. First operand 7253 states and 25808 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:29,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:29,595 INFO L93 Difference]: Finished difference Result 11052 states and 38544 transitions. [2021-08-21 12:59:29,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:59:29,596 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:59:29,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:29,619 INFO L225 Difference]: With dead ends: 11052 [2021-08-21 12:59:29,619 INFO L226 Difference]: Without dead ends: 10989 [2021-08-21 12:59:29,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 661.6ms TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:59:29,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10989 states. [2021-08-21 12:59:29,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10989 to 7335. [2021-08-21 12:59:29,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7335 states, 7334 states have (on average 3.5568584674120536) internal successors, (26086), 7334 states have internal predecessors, (26086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:29,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7335 states to 7335 states and 26086 transitions. [2021-08-21 12:59:29,755 INFO L78 Accepts]: Start accepts. Automaton has 7335 states and 26086 transitions. Word has length 33 [2021-08-21 12:59:29,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:29,756 INFO L470 AbstractCegarLoop]: Abstraction has 7335 states and 26086 transitions. [2021-08-21 12:59:29,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:29,756 INFO L276 IsEmpty]: Start isEmpty. Operand 7335 states and 26086 transitions. [2021-08-21 12:59:29,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:59:29,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:29,767 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:29,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:29,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:29,967 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:29,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:29,968 INFO L82 PathProgramCache]: Analyzing trace with hash -642846394, now seen corresponding path program 37 times [2021-08-21 12:59:29,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:29,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270656220] [2021-08-21 12:59:29,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:29,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:30,476 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 12:59:30,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:30,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270656220] [2021-08-21 12:59:30,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270656220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:30,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853177257] [2021-08-21 12:59:30,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:59:30,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:30,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:30,478 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:30,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 12:59:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:33,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:59:33,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:33,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:59:33,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:33,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-21 12:59:33,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2021-08-21 12:59:34,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 99 [2021-08-21 12:59:34,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 77 [2021-08-21 12:59:34,226 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 12:59:34,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853177257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:34,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:34,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 12:59:34,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721971631] [2021-08-21 12:59:34,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:59:34,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:34,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:59:34,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:59:34,227 INFO L87 Difference]: Start difference. First operand 7335 states and 26086 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:35,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:35,019 INFO L93 Difference]: Finished difference Result 10590 states and 37104 transitions. [2021-08-21 12:59:35,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:59:35,020 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 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 33 [2021-08-21 12:59:35,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:35,043 INFO L225 Difference]: With dead ends: 10590 [2021-08-21 12:59:35,043 INFO L226 Difference]: Without dead ends: 10448 [2021-08-21 12:59:35,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 675.3ms TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:59:35,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10448 states. [2021-08-21 12:59:35,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10448 to 7315. [2021-08-21 12:59:35,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7315 states, 7314 states have (on average 3.5572873940388297) internal successors, (26018), 7314 states have internal predecessors, (26018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:35,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7315 states to 7315 states and 26018 transitions. [2021-08-21 12:59:35,161 INFO L78 Accepts]: Start accepts. Automaton has 7315 states and 26018 transitions. Word has length 33 [2021-08-21 12:59:35,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:35,162 INFO L470 AbstractCegarLoop]: Abstraction has 7315 states and 26018 transitions. [2021-08-21 12:59:35,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:35,162 INFO L276 IsEmpty]: Start isEmpty. Operand 7315 states and 26018 transitions. [2021-08-21 12:59:35,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:59:35,172 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:35,172 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:35,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:35,372 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,SelfDestructingSolverStorable42 [2021-08-21 12:59:35,373 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:35,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:35,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1562234686, now seen corresponding path program 38 times [2021-08-21 12:59:35,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:35,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214473906] [2021-08-21 12:59:35,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:35,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:35,797 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 12:59:35,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:35,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214473906] [2021-08-21 12:59:35,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214473906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:35,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171020196] [2021-08-21 12:59:35,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:59:35,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:35,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:35,799 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:35,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 12:59:38,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:59:38,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:38,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:59:38,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:38,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:59:38,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:38,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-21 12:59:39,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:39,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 51 [2021-08-21 12:59:39,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 101 [2021-08-21 12:59:39,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 77 [2021-08-21 12:59:39,435 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 12:59:39,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171020196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:39,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:39,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 12:59:39,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779874401] [2021-08-21 12:59:39,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:59:39,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:39,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:59:39,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:59:39,436 INFO L87 Difference]: Start difference. First operand 7315 states and 26018 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:40,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:40,024 INFO L93 Difference]: Finished difference Result 10504 states and 36765 transitions. [2021-08-21 12:59:40,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:59:40,028 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 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 33 [2021-08-21 12:59:40,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:40,050 INFO L225 Difference]: With dead ends: 10504 [2021-08-21 12:59:40,050 INFO L226 Difference]: Without dead ends: 10375 [2021-08-21 12:59:40,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 587.2ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:59:40,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10375 states. [2021-08-21 12:59:40,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10375 to 7297. [2021-08-21 12:59:40,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7297 states, 7296 states have (on average 3.5583881578947367) internal successors, (25962), 7296 states have internal predecessors, (25962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:40,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7297 states to 7297 states and 25962 transitions. [2021-08-21 12:59:40,173 INFO L78 Accepts]: Start accepts. Automaton has 7297 states and 25962 transitions. Word has length 33 [2021-08-21 12:59:40,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:40,173 INFO L470 AbstractCegarLoop]: Abstraction has 7297 states and 25962 transitions. [2021-08-21 12:59:40,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:40,173 INFO L276 IsEmpty]: Start isEmpty. Operand 7297 states and 25962 transitions. [2021-08-21 12:59:40,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:59:40,183 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:40,184 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:40,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-21 12:59:40,384 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,SelfDestructingSolverStorable43 [2021-08-21 12:59:40,384 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:40,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:40,384 INFO L82 PathProgramCache]: Analyzing trace with hash -818637060, now seen corresponding path program 39 times [2021-08-21 12:59:40,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:40,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183571385] [2021-08-21 12:59:40,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:40,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:40,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:40,842 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 12:59:40,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:40,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183571385] [2021-08-21 12:59:40,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183571385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:40,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19418790] [2021-08-21 12:59:40,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:59:40,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:40,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:40,843 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:40,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 12:59:43,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:59:43,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:43,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:59:43,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:43,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:59:47,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:59:47,404 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 195 treesize of output 199 [2021-08-21 12:59:47,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:59:47,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 236 treesize of output 228 [2021-08-21 12:59:47,438 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-08-21 12:59:47,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 228 treesize of output 216 [2021-08-21 12:59:53,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:59:53,618 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 152 treesize of output 138 [2021-08-21 12:59:54,227 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 12:59:54,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19418790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:54,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:54,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-08-21 12:59:54,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187054003] [2021-08-21 12:59:54,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:59:54,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:54,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:59:54,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:59:54,229 INFO L87 Difference]: Start difference. First operand 7297 states and 25962 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:58,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:58,117 INFO L93 Difference]: Finished difference Result 12424 states and 42575 transitions. [2021-08-21 12:59:58,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 12:59:58,118 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:59:58,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:58,147 INFO L225 Difference]: With dead ends: 12424 [2021-08-21 12:59:58,147 INFO L226 Difference]: Without dead ends: 12304 [2021-08-21 12:59:58,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1555 ImplicationChecksByTransitivity, 2996.7ms TimeCoverageRelationStatistics Valid=617, Invalid=4495, Unknown=0, NotChecked=0, Total=5112 [2021-08-21 12:59:58,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12304 states. [2021-08-21 12:59:58,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12304 to 7396. [2021-08-21 12:59:58,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7396 states, 7395 states have (on average 3.5538877620013523) internal successors, (26281), 7395 states have internal predecessors, (26281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:58,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7396 states to 7396 states and 26281 transitions. [2021-08-21 12:59:58,312 INFO L78 Accepts]: Start accepts. Automaton has 7396 states and 26281 transitions. Word has length 33 [2021-08-21 12:59:58,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:58,312 INFO L470 AbstractCegarLoop]: Abstraction has 7396 states and 26281 transitions. [2021-08-21 12:59:58,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:58,312 INFO L276 IsEmpty]: Start isEmpty. Operand 7396 states and 26281 transitions. [2021-08-21 12:59:58,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:59:58,324 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:58,324 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:58,352 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 12:59:58,524 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,SelfDestructingSolverStorable44 [2021-08-21 12:59:58,524 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:58,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:58,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1640346532, now seen corresponding path program 40 times [2021-08-21 12:59:58,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:58,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372717691] [2021-08-21 12:59:58,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:58,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:59,010 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 12:59:59,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:59,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372717691] [2021-08-21 12:59:59,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372717691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:59,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745873021] [2021-08-21 12:59:59,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:59:59,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:59,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:59,011 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:59,012 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 13:00:02,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:00:02,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:02,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:00:02,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:02,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 13:00:02,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:00:02,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:00:02,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 164 [2021-08-21 13:00:02,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:00:02,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:00:02,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 125 [2021-08-21 13:00:02,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:00:02,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 111 [2021-08-21 13:00:03,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 68 [2021-08-21 13:00:03,698 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 13:00:03,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745873021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:03,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:03,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-08-21 13:00:03,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510893809] [2021-08-21 13:00:03,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 13:00:03,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:03,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 13:00:03,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-08-21 13:00:03,700 INFO L87 Difference]: Start difference. First operand 7396 states and 26281 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:05,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:05,471 INFO L93 Difference]: Finished difference Result 12334 states and 42740 transitions. [2021-08-21 13:00:05,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 13:00:05,471 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:00:05,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:05,501 INFO L225 Difference]: With dead ends: 12334 [2021-08-21 13:00:05,502 INFO L226 Difference]: Without dead ends: 12243 [2021-08-21 13:00:05,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1584.1ms TimeCoverageRelationStatistics Valid=302, Invalid=1504, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 13:00:05,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12243 states. [2021-08-21 13:00:05,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12243 to 7421. [2021-08-21 13:00:05,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7421 states, 7420 states have (on average 3.5548517520215634) internal successors, (26377), 7420 states have internal predecessors, (26377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:05,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7421 states to 7421 states and 26377 transitions. [2021-08-21 13:00:05,709 INFO L78 Accepts]: Start accepts. Automaton has 7421 states and 26377 transitions. Word has length 33 [2021-08-21 13:00:05,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:05,710 INFO L470 AbstractCegarLoop]: Abstraction has 7421 states and 26377 transitions. [2021-08-21 13:00:05,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:05,710 INFO L276 IsEmpty]: Start isEmpty. Operand 7421 states and 26377 transitions. [2021-08-21 13:00:05,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:00:05,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:05,723 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:05,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-21 13:00:05,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 13:00:05,923 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:00:05,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:05,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2137030116, now seen corresponding path program 41 times [2021-08-21 13:00:05,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:05,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707068570] [2021-08-21 13:00:05,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:05,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:08,215 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 13:00:08,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:08,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707068570] [2021-08-21 13:00:08,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707068570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:08,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514078587] [2021-08-21 13:00:08,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:00:08,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:08,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:08,216 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 13:00:08,217 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 13:00:11,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:00:11,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:11,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:00:11,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:11,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 13:00:11,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:00:11,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-08-21 13:00:11,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:00:11,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:00:11,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 124 [2021-08-21 13:00:11,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:00:11,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:00:11,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 104 [2021-08-21 13:00:12,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2021-08-21 13:00:12,320 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 13:00:12,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514078587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:12,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:12,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 13:00:12,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657853627] [2021-08-21 13:00:12,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 13:00:12,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:12,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 13:00:12,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:00:12,321 INFO L87 Difference]: Start difference. First operand 7421 states and 26377 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:13,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:13,325 INFO L93 Difference]: Finished difference Result 10960 states and 38225 transitions. [2021-08-21 13:00:13,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:00:13,325 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:00:13,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:13,349 INFO L225 Difference]: With dead ends: 10960 [2021-08-21 13:00:13,350 INFO L226 Difference]: Without dead ends: 10863 [2021-08-21 13:00:13,350 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 866.2ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:00:13,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10863 states. [2021-08-21 13:00:13,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10863 to 7447. [2021-08-21 13:00:13,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7447 states, 7446 states have (on average 3.552645715820575) internal successors, (26453), 7446 states have internal predecessors, (26453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:13,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7447 states to 7447 states and 26453 transitions. [2021-08-21 13:00:13,486 INFO L78 Accepts]: Start accepts. Automaton has 7447 states and 26453 transitions. Word has length 33 [2021-08-21 13:00:13,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:13,486 INFO L470 AbstractCegarLoop]: Abstraction has 7447 states and 26453 transitions. [2021-08-21 13:00:13,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:13,487 INFO L276 IsEmpty]: Start isEmpty. Operand 7447 states and 26453 transitions. [2021-08-21 13:00:13,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:00:13,498 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:13,498 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:13,525 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 13:00:13,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:13,698 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:00:13,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:13,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1734340888, now seen corresponding path program 42 times [2021-08-21 13:00:13,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:13,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519497353] [2021-08-21 13:00:13,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:13,699 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:15,044 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 13:00:15,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:15,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519497353] [2021-08-21 13:00:15,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519497353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:15,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344259736] [2021-08-21 13:00:15,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:00:15,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:15,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:15,046 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 13:00:15,047 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 13:00:18,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:00:18,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:18,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:00:18,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:18,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 13:00:18,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:00:18,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-08-21 13:00:19,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:00:19,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2021-08-21 13:00:19,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 101 [2021-08-21 13:00:19,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 77 [2021-08-21 13:00:19,316 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 13:00:19,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344259736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:19,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:19,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-08-21 13:00:19,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887433089] [2021-08-21 13:00:19,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 13:00:19,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:19,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 13:00:19,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-08-21 13:00:19,317 INFO L87 Difference]: Start difference. First operand 7447 states and 26453 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 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 13:00:20,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:20,456 INFO L93 Difference]: Finished difference Result 11304 states and 39339 transitions. [2021-08-21 13:00:20,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:00:20,456 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:00:20,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:20,488 INFO L225 Difference]: With dead ends: 11304 [2021-08-21 13:00:20,488 INFO L226 Difference]: Without dead ends: 11229 [2021-08-21 13:00:20,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 992.1ms TimeCoverageRelationStatistics Valid=285, Invalid=1197, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:00:20,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11229 states. [2021-08-21 13:00:20,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11229 to 7439. [2021-08-21 13:00:20,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7439 states, 7438 states have (on average 3.554046786770637) internal successors, (26435), 7438 states have internal predecessors, (26435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:20,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7439 states to 7439 states and 26435 transitions. [2021-08-21 13:00:20,652 INFO L78 Accepts]: Start accepts. Automaton has 7439 states and 26435 transitions. Word has length 33 [2021-08-21 13:00:20,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:20,652 INFO L470 AbstractCegarLoop]: Abstraction has 7439 states and 26435 transitions. [2021-08-21 13:00:20,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 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 13:00:20,652 INFO L276 IsEmpty]: Start isEmpty. Operand 7439 states and 26435 transitions. [2021-08-21 13:00:20,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:00:20,664 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:20,664 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:20,691 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 13:00:20,864 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,SelfDestructingSolverStorable47 [2021-08-21 13:00:20,864 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:00:20,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:20,865 INFO L82 PathProgramCache]: Analyzing trace with hash -355495072, now seen corresponding path program 43 times [2021-08-21 13:00:20,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:20,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513830839] [2021-08-21 13:00:20,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:20,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:21,532 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 13:00:21,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:21,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513830839] [2021-08-21 13:00:21,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513830839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:21,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011231045] [2021-08-21 13:00:21,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:00:21,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:21,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:21,539 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 13:00:21,541 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 13:00:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:24,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:00:24,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:25,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 13:00:25,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:00:25,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 45 [2021-08-21 13:00:25,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:00:25,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:00:25,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 122 [2021-08-21 13:00:25,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:00:25,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:00:25,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 104 [2021-08-21 13:00:25,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2021-08-21 13:00:25,797 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 13:00:25,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011231045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:25,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:25,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-08-21 13:00:25,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143515793] [2021-08-21 13:00:25,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 13:00:25,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:25,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 13:00:25,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-08-21 13:00:25,798 INFO L87 Difference]: Start difference. First operand 7439 states and 26435 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:27,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:27,234 INFO L93 Difference]: Finished difference Result 11221 states and 38996 transitions. [2021-08-21 13:00:27,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:00:27,235 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:00:27,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:27,263 INFO L225 Difference]: With dead ends: 11221 [2021-08-21 13:00:27,263 INFO L226 Difference]: Without dead ends: 11136 [2021-08-21 13:00:27,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1154.8ms TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:00:27,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11136 states. [2021-08-21 13:00:27,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11136 to 7475. [2021-08-21 13:00:27,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7475 states, 7474 states have (on average 3.551110516457051) internal successors, (26541), 7474 states have internal predecessors, (26541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7475 states to 7475 states and 26541 transitions. [2021-08-21 13:00:27,413 INFO L78 Accepts]: Start accepts. Automaton has 7475 states and 26541 transitions. Word has length 33 [2021-08-21 13:00:27,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:27,413 INFO L470 AbstractCegarLoop]: Abstraction has 7475 states and 26541 transitions. [2021-08-21 13:00:27,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:27,413 INFO L276 IsEmpty]: Start isEmpty. Operand 7475 states and 26541 transitions. [2021-08-21 13:00:27,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:00:27,424 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:27,424 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:27,453 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 13:00:27,624 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,SelfDestructingSolverStorable48 [2021-08-21 13:00:27,625 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:00:27,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:27,625 INFO L82 PathProgramCache]: Analyzing trace with hash 47194156, now seen corresponding path program 44 times [2021-08-21 13:00:27,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:27,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342199759] [2021-08-21 13:00:27,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:27,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:28,296 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 13:00:28,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:28,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342199759] [2021-08-21 13:00:28,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342199759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:28,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911796874] [2021-08-21 13:00:28,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:00:28,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:28,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:28,297 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 13:00:28,298 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 13:00:31,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:00:31,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:31,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:00:31,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:31,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 13:00:32,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:00:32,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 47 [2021-08-21 13:00:32,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:00:32,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2021-08-21 13:00:32,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 101 [2021-08-21 13:00:32,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 77 [2021-08-21 13:00:32,710 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 13:00:32,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911796874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:32,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:32,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-08-21 13:00:32,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218732991] [2021-08-21 13:00:32,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 13:00:32,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:32,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 13:00:32,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-08-21 13:00:32,711 INFO L87 Difference]: Start difference. First operand 7475 states and 26541 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 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 13:00:34,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:34,507 INFO L93 Difference]: Finished difference Result 12315 states and 42411 transitions. [2021-08-21 13:00:34,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 13:00:34,507 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:00:34,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:34,532 INFO L225 Difference]: With dead ends: 12315 [2021-08-21 13:00:34,532 INFO L226 Difference]: Without dead ends: 12240 [2021-08-21 13:00:34,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1417.7ms TimeCoverageRelationStatistics Valid=387, Invalid=1593, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 13:00:34,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12240 states. [2021-08-21 13:00:34,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12240 to 7467. [2021-08-21 13:00:34,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7467 states, 7466 states have (on average 3.551701044736137) internal successors, (26517), 7466 states have internal predecessors, (26517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:34,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7467 states to 7467 states and 26517 transitions. [2021-08-21 13:00:34,684 INFO L78 Accepts]: Start accepts. Automaton has 7467 states and 26517 transitions. Word has length 33 [2021-08-21 13:00:34,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:34,684 INFO L470 AbstractCegarLoop]: Abstraction has 7467 states and 26517 transitions. [2021-08-21 13:00:34,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 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 13:00:34,684 INFO L276 IsEmpty]: Start isEmpty. Operand 7467 states and 26517 transitions. [2021-08-21 13:00:34,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:00:34,695 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:34,695 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:34,724 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 13:00:34,895 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,SelfDestructingSolverStorable49 [2021-08-21 13:00:34,895 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:00:34,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:34,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1369749336, now seen corresponding path program 45 times [2021-08-21 13:00:34,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:34,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202520206] [2021-08-21 13:00:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:34,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:34,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:35,887 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 13:00:35,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:35,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202520206] [2021-08-21 13:00:35,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202520206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:35,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361815387] [2021-08-21 13:00:35,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:00:35,888 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:35,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:35,888 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 13:00:35,891 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 13:00:39,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:00:39,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:39,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 13:00:39,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:39,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 13:00:39,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:00:39,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 45 [2021-08-21 13:00:39,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:00:39,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:00:39,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 77 [2021-08-21 13:00:40,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 122 [2021-08-21 13:00:40,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 98 [2021-08-21 13:00:40,791 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 13:00:40,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361815387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:40,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:40,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-21 13:00:40,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262268410] [2021-08-21 13:00:40,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 13:00:40,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:40,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 13:00:40,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:00:40,792 INFO L87 Difference]: Start difference. First operand 7467 states and 26517 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:42,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:42,277 INFO L93 Difference]: Finished difference Result 9081 states and 31344 transitions. [2021-08-21 13:00:42,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:00:42,293 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:00:42,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:42,317 INFO L225 Difference]: With dead ends: 9081 [2021-08-21 13:00:42,317 INFO L226 Difference]: Without dead ends: 8945 [2021-08-21 13:00:42,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1283.3ms TimeCoverageRelationStatistics Valid=262, Invalid=1718, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 13:00:42,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8945 states. [2021-08-21 13:00:42,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8945 to 7455. [2021-08-21 13:00:42,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7455 states, 7454 states have (on average 3.5533941507915214) internal successors, (26487), 7454 states have internal predecessors, (26487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:42,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7455 states to 7455 states and 26487 transitions. [2021-08-21 13:00:42,474 INFO L78 Accepts]: Start accepts. Automaton has 7455 states and 26487 transitions. Word has length 33 [2021-08-21 13:00:42,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:42,475 INFO L470 AbstractCegarLoop]: Abstraction has 7455 states and 26487 transitions. [2021-08-21 13:00:42,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:42,475 INFO L276 IsEmpty]: Start isEmpty. Operand 7455 states and 26487 transitions. [2021-08-21 13:00:42,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:00:42,487 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:42,487 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:42,516 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 13:00:42,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:42,688 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:00:42,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:42,688 INFO L82 PathProgramCache]: Analyzing trace with hash -2062178708, now seen corresponding path program 46 times [2021-08-21 13:00:42,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:42,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171160086] [2021-08-21 13:00:42,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:42,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:43,163 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 13:00:43,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:43,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171160086] [2021-08-21 13:00:43,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171160086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:43,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042448860] [2021-08-21 13:00:43,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:00:43,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:43,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:43,164 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 13:00:43,165 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 13:00:46,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:00:46,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:46,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:00:46,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:46,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 13:00:47,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:00:47,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 65 [2021-08-21 13:00:47,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:00:47,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 89 [2021-08-21 13:00:47,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 101 [2021-08-21 13:00:47,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 77 [2021-08-21 13:00:47,535 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 13:00:47,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042448860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:47,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:47,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-08-21 13:00:47,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241158201] [2021-08-21 13:00:47,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 13:00:47,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:47,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 13:00:47,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-08-21 13:00:47,536 INFO L87 Difference]: Start difference. First operand 7455 states and 26487 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) 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 13:00:48,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:48,426 INFO L93 Difference]: Finished difference Result 10415 states and 36426 transitions. [2021-08-21 13:00:48,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:00:48,426 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) 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 33 [2021-08-21 13:00:48,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:48,449 INFO L225 Difference]: With dead ends: 10415 [2021-08-21 13:00:48,449 INFO L226 Difference]: Without dead ends: 10339 [2021-08-21 13:00:48,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 834.9ms TimeCoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:00:48,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10339 states. [2021-08-21 13:00:48,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10339 to 7455. [2021-08-21 13:00:48,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7455 states, 7454 states have (on average 3.5533941507915214) internal successors, (26487), 7454 states have internal predecessors, (26487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:48,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7455 states to 7455 states and 26487 transitions. [2021-08-21 13:00:48,585 INFO L78 Accepts]: Start accepts. Automaton has 7455 states and 26487 transitions. Word has length 33 [2021-08-21 13:00:48,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:48,586 INFO L470 AbstractCegarLoop]: Abstraction has 7455 states and 26487 transitions. [2021-08-21 13:00:48,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) 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 13:00:48,586 INFO L276 IsEmpty]: Start isEmpty. Operand 7455 states and 26487 transitions. [2021-08-21 13:00:48,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 13:00:48,597 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:48,597 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:48,625 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 13:00:48,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:48,798 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:00:48,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:48,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1429774454, now seen corresponding path program 47 times [2021-08-21 13:00:48,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:48,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079279996] [2021-08-21 13:00:48,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:48,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:48,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 13:00:48,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:48,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079279996] [2021-08-21 13:00:48,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079279996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:48,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306114418] [2021-08-21 13:00:48,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:00:48,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:48,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:48,845 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 13:00:48,846 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 13:00:52,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:00:52,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:52,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:00:52,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 13:00:52,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306114418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:52,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:52,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 13:00:52,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687668164] [2021-08-21 13:00:52,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:00:52,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:52,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:00:52,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:00:52,492 INFO L87 Difference]: Start difference. First operand 7455 states and 26487 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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 13:00:52,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:52,624 INFO L93 Difference]: Finished difference Result 12916 states and 44729 transitions. [2021-08-21 13:00:52,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 13:00:52,624 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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 35 [2021-08-21 13:00:52,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:52,657 INFO L225 Difference]: With dead ends: 12916 [2021-08-21 13:00:52,657 INFO L226 Difference]: Without dead ends: 12829 [2021-08-21 13:00:52,657 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:00:52,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12829 states. [2021-08-21 13:00:52,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12829 to 10771. [2021-08-21 13:00:52,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10771 states, 10770 states have (on average 3.594707520891365) internal successors, (38715), 10770 states have internal predecessors, (38715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:52,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10771 states to 10771 states and 38715 transitions. [2021-08-21 13:00:52,861 INFO L78 Accepts]: Start accepts. Automaton has 10771 states and 38715 transitions. Word has length 35 [2021-08-21 13:00:52,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:52,861 INFO L470 AbstractCegarLoop]: Abstraction has 10771 states and 38715 transitions. [2021-08-21 13:00:52,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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 13:00:52,861 INFO L276 IsEmpty]: Start isEmpty. Operand 10771 states and 38715 transitions. [2021-08-21 13:00:52,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 13:00:52,877 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:52,877 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:52,906 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 13:00:53,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:53,081 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:00:53,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:53,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1803987778, now seen corresponding path program 48 times [2021-08-21 13:00:53,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:53,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866381021] [2021-08-21 13:00:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:53,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 13:00:53,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:53,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866381021] [2021-08-21 13:00:53,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866381021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:53,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276628698] [2021-08-21 13:00:53,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:00:53,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:53,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:53,125 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 13:00:53,126 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 13:00:56,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:00:56,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:56,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:00:56,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 13:00:56,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276628698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:56,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:56,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 13:00:56,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976595953] [2021-08-21 13:00:56,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 13:00:56,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:56,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 13:00:56,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:00:56,895 INFO L87 Difference]: Start difference. First operand 10771 states and 38715 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 13:00:57,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:57,014 INFO L93 Difference]: Finished difference Result 12470 states and 43509 transitions. [2021-08-21 13:00:57,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 13:00:57,015 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 35 [2021-08-21 13:00:57,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:57,043 INFO L225 Difference]: With dead ends: 12470 [2021-08-21 13:00:57,044 INFO L226 Difference]: Without dead ends: 12470 [2021-08-21 13:00:57,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:00:57,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12470 states. [2021-08-21 13:00:57,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12470 to 9943. [2021-08-21 13:00:57,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.5648762824381413) internal successors, (35442), 9942 states have internal predecessors, (35442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:57,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 35442 transitions. [2021-08-21 13:00:57,205 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 35442 transitions. Word has length 35 [2021-08-21 13:00:57,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:57,205 INFO L470 AbstractCegarLoop]: Abstraction has 9943 states and 35442 transitions. [2021-08-21 13:00:57,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 13:00:57,205 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 35442 transitions. [2021-08-21 13:00:57,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 13:00:57,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:57,219 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:57,247 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 13:00:57,420 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,SelfDestructingSolverStorable53 [2021-08-21 13:00:57,420 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:00:57,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:57,420 INFO L82 PathProgramCache]: Analyzing trace with hash -512412408, now seen corresponding path program 49 times [2021-08-21 13:00:57,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:57,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927978995] [2021-08-21 13:00:57,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:57,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 13:00:57,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:57,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927978995] [2021-08-21 13:00:57,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927978995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:57,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773432562] [2021-08-21 13:00:57,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:00:57,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:57,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:57,551 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 13:00:57,573 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 13:01:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:01,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:01:01,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 13:01:01,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773432562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:01,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:01,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 13:01:01,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132099574] [2021-08-21 13:01:01,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 13:01:01,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:01,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 13:01:01,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:01:01,481 INFO L87 Difference]: Start difference. First operand 9943 states and 35442 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 13:01:01,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:01,606 INFO L93 Difference]: Finished difference Result 13393 states and 46272 transitions. [2021-08-21 13:01:01,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 13:01:01,606 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 35 [2021-08-21 13:01:01,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:01,641 INFO L225 Difference]: With dead ends: 13393 [2021-08-21 13:01:01,642 INFO L226 Difference]: Without dead ends: 13318 [2021-08-21 13:01:01,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:01:01,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13318 states. [2021-08-21 13:01:01,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13318 to 9478. [2021-08-21 13:01:01,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9478 states, 9477 states have (on average 3.566318455207344) internal successors, (33798), 9477 states have internal predecessors, (33798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:01,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9478 states to 9478 states and 33798 transitions. [2021-08-21 13:01:01,846 INFO L78 Accepts]: Start accepts. Automaton has 9478 states and 33798 transitions. Word has length 35 [2021-08-21 13:01:01,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:01,846 INFO L470 AbstractCegarLoop]: Abstraction has 9478 states and 33798 transitions. [2021-08-21 13:01:01,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 13:01:01,847 INFO L276 IsEmpty]: Start isEmpty. Operand 9478 states and 33798 transitions. [2021-08-21 13:01:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 13:01:01,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:01,860 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:01,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-21 13:01:02,061 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,SelfDestructingSolverStorable54 [2021-08-21 13:01:02,061 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:01:02,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:02,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1889974284, now seen corresponding path program 50 times [2021-08-21 13:01:02,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:02,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927992804] [2021-08-21 13:01:02,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:02,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 13:01:02,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:02,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927992804] [2021-08-21 13:01:02,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927992804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:02,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470829540] [2021-08-21 13:01:02,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:01:02,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:02,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:02,117 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 13:01:02,161 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 13:01:05,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:01:05,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:05,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:01:05,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 13:01:05,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470829540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:05,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:05,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 13:01:05,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966548954] [2021-08-21 13:01:05,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 13:01:05,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:05,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 13:01:05,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:01:05,866 INFO L87 Difference]: Start difference. First operand 9478 states and 33798 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 13:01:05,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:05,989 INFO L93 Difference]: Finished difference Result 12392 states and 42312 transitions. [2021-08-21 13:01:05,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 13:01:05,989 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 35 [2021-08-21 13:01:05,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:06,019 INFO L225 Difference]: With dead ends: 12392 [2021-08-21 13:01:06,019 INFO L226 Difference]: Without dead ends: 12392 [2021-08-21 13:01:06,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:01:06,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12392 states. [2021-08-21 13:01:06,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12392 to 9556. [2021-08-21 13:01:06,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9556 states, 9555 states have (on average 3.5652537938252222) internal successors, (34066), 9555 states have internal predecessors, (34066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:06,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9556 states to 9556 states and 34066 transitions. [2021-08-21 13:01:06,203 INFO L78 Accepts]: Start accepts. Automaton has 9556 states and 34066 transitions. Word has length 35 [2021-08-21 13:01:06,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:06,203 INFO L470 AbstractCegarLoop]: Abstraction has 9556 states and 34066 transitions. [2021-08-21 13:01:06,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 13:01:06,203 INFO L276 IsEmpty]: Start isEmpty. Operand 9556 states and 34066 transitions. [2021-08-21 13:01:06,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 13:01:06,217 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:06,217 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:06,244 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 13:01:06,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 13:01:06,417 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:01:06,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:06,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1533697720, now seen corresponding path program 51 times [2021-08-21 13:01:06,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:06,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197940300] [2021-08-21 13:01:06,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:06,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 13:01:06,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:06,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197940300] [2021-08-21 13:01:06,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197940300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:06,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095521473] [2021-08-21 13:01:06,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:01:06,517 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:06,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:06,518 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 13:01:06,518 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 13:01:10,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:01:10,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:10,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:01:10,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:10,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 13:01:14,941 INFO L354 Elim1Store]: treesize reduction 40, result has 50.6 percent of original size [2021-08-21 13:01:14,941 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 206 treesize of output 204 [2021-08-21 13:01:14,990 INFO L354 Elim1Store]: treesize reduction 40, result has 50.6 percent of original size [2021-08-21 13:01:14,991 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 224 [2021-08-21 13:01:15,004 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-08-21 13:01:15,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 224 treesize of output 222 [2021-08-21 13:01:21,758 INFO L354 Elim1Store]: treesize reduction 20, result has 63.6 percent of original size [2021-08-21 13:01:21,759 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 145 treesize of output 143 [2021-08-21 13:01:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:01:22,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095521473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:22,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:22,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 17] total 23 [2021-08-21 13:01:22,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721211216] [2021-08-21 13:01:22,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 13:01:22,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:22,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 13:01:22,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-08-21 13:01:22,336 INFO L87 Difference]: Start difference. First operand 9556 states and 34066 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:25,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:25,720 INFO L93 Difference]: Finished difference Result 16423 states and 55135 transitions. [2021-08-21 13:01:25,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 13:01:25,721 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 13:01:25,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:25,759 INFO L225 Difference]: With dead ends: 16423 [2021-08-21 13:01:25,759 INFO L226 Difference]: Without dead ends: 16393 [2021-08-21 13:01:25,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 2384.0ms TimeCoverageRelationStatistics Valid=789, Invalid=4041, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 13:01:25,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16393 states. [2021-08-21 13:01:25,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16393 to 10264. [2021-08-21 13:01:25,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10264 states, 10263 states have (on average 3.5604599045113514) internal successors, (36541), 10263 states have internal predecessors, (36541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:25,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10264 states to 10264 states and 36541 transitions. [2021-08-21 13:01:25,975 INFO L78 Accepts]: Start accepts. Automaton has 10264 states and 36541 transitions. Word has length 35 [2021-08-21 13:01:25,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:25,975 INFO L470 AbstractCegarLoop]: Abstraction has 10264 states and 36541 transitions. [2021-08-21 13:01:25,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:25,975 INFO L276 IsEmpty]: Start isEmpty. Operand 10264 states and 36541 transitions. [2021-08-21 13:01:25,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 13:01:25,990 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:25,990 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:26,017 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 13:01:26,190 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,SelfDestructingSolverStorable56 [2021-08-21 13:01:26,191 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:01:26,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:26,191 INFO L82 PathProgramCache]: Analyzing trace with hash 761848958, now seen corresponding path program 52 times [2021-08-21 13:01:26,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:26,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240488076] [2021-08-21 13:01:26,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:26,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 13:01:26,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:26,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240488076] [2021-08-21 13:01:26,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240488076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:26,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927702359] [2021-08-21 13:01:26,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:01:26,252 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:26,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:26,253 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 13:01:26,254 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 13:01:30,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:01:30,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:30,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:01:30,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:30,082 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 13:01:30,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927702359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:30,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:30,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 13:01:30,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075212922] [2021-08-21 13:01:30,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:01:30,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:30,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:01:30,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:01:30,083 INFO L87 Difference]: Start difference. First operand 10264 states and 36541 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 13:01:30,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:30,220 INFO L93 Difference]: Finished difference Result 12095 states and 41623 transitions. [2021-08-21 13:01:30,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 13:01:30,220 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 35 [2021-08-21 13:01:30,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:30,247 INFO L225 Difference]: With dead ends: 12095 [2021-08-21 13:01:30,247 INFO L226 Difference]: Without dead ends: 12032 [2021-08-21 13:01:30,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:01:30,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12032 states. [2021-08-21 13:01:30,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12032 to 10091. [2021-08-21 13:01:30,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10091 states, 10090 states have (on average 3.567492566897919) internal successors, (35996), 10090 states have internal predecessors, (35996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:30,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10091 states to 10091 states and 35996 transitions. [2021-08-21 13:01:30,422 INFO L78 Accepts]: Start accepts. Automaton has 10091 states and 35996 transitions. Word has length 35 [2021-08-21 13:01:30,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:30,422 INFO L470 AbstractCegarLoop]: Abstraction has 10091 states and 35996 transitions. [2021-08-21 13:01:30,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 13:01:30,422 INFO L276 IsEmpty]: Start isEmpty. Operand 10091 states and 35996 transitions. [2021-08-21 13:01:30,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 13:01:30,437 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:30,437 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:30,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-21 13:01:30,637 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,SelfDestructingSolverStorable57 [2021-08-21 13:01:30,638 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:01:30,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:30,638 INFO L82 PathProgramCache]: Analyzing trace with hash -809411870, now seen corresponding path program 53 times [2021-08-21 13:01:30,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:30,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351765687] [2021-08-21 13:01:30,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:30,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:01:30,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:30,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351765687] [2021-08-21 13:01:30,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351765687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:30,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018276230] [2021-08-21 13:01:30,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:01:30,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:30,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:30,697 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 13:01:30,697 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 13:01:34,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:01:34,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:34,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:01:34,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 13:01:34,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018276230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:34,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:34,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 13:01:34,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302301309] [2021-08-21 13:01:34,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 13:01:34,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:34,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 13:01:34,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:01:34,730 INFO L87 Difference]: Start difference. First operand 10091 states and 35996 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 13:01:34,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:34,854 INFO L93 Difference]: Finished difference Result 14723 states and 51647 transitions. [2021-08-21 13:01:34,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 13:01:34,854 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 35 [2021-08-21 13:01:34,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:34,887 INFO L225 Difference]: With dead ends: 14723 [2021-08-21 13:01:34,887 INFO L226 Difference]: Without dead ends: 14651 [2021-08-21 13:01:34,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:01:34,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14651 states. [2021-08-21 13:01:35,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14651 to 13057. [2021-08-21 13:01:35,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13057 states, 13056 states have (on average 3.6134344362745097) internal successors, (47177), 13056 states have internal predecessors, (47177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:35,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13057 states to 13057 states and 47177 transitions. [2021-08-21 13:01:35,118 INFO L78 Accepts]: Start accepts. Automaton has 13057 states and 47177 transitions. Word has length 35 [2021-08-21 13:01:35,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:35,118 INFO L470 AbstractCegarLoop]: Abstraction has 13057 states and 47177 transitions. [2021-08-21 13:01:35,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 13:01:35,118 INFO L276 IsEmpty]: Start isEmpty. Operand 13057 states and 47177 transitions. [2021-08-21 13:01:35,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 13:01:35,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:35,136 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:35,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-21 13:01:35,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-21 13:01:35,337 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:01:35,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:35,337 INFO L82 PathProgramCache]: Analyzing trace with hash 928580104, now seen corresponding path program 54 times [2021-08-21 13:01:35,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:35,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321470005] [2021-08-21 13:01:35,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:35,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:35,384 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 13:01:35,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:35,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321470005] [2021-08-21 13:01:35,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321470005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:35,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732110813] [2021-08-21 13:01:35,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:01:35,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:35,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:35,386 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 13:01:35,410 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 13:01:39,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:01:39,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:39,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:01:39,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:39,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:01:39,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732110813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:39,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:39,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-08-21 13:01:39,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564526018] [2021-08-21 13:01:39,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:01:39,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:39,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:01:39,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:01:39,255 INFO L87 Difference]: Start difference. First operand 13057 states and 47177 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:40,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:40,409 INFO L93 Difference]: Finished difference Result 32011 states and 105116 transitions. [2021-08-21 13:01:40,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-21 13:01:40,410 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 13:01:40,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:40,490 INFO L225 Difference]: With dead ends: 32011 [2021-08-21 13:01:40,490 INFO L226 Difference]: Without dead ends: 31472 [2021-08-21 13:01:40,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 574.7ms TimeCoverageRelationStatistics Valid=1235, Invalid=4315, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 13:01:40,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31472 states. [2021-08-21 13:01:40,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31472 to 13252. [2021-08-21 13:01:40,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13252 states, 13251 states have (on average 3.6043317485472794) internal successors, (47761), 13251 states have internal predecessors, (47761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:40,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13252 states to 13252 states and 47761 transitions. [2021-08-21 13:01:40,875 INFO L78 Accepts]: Start accepts. Automaton has 13252 states and 47761 transitions. Word has length 35 [2021-08-21 13:01:40,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:40,875 INFO L470 AbstractCegarLoop]: Abstraction has 13252 states and 47761 transitions. [2021-08-21 13:01:40,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:40,875 INFO L276 IsEmpty]: Start isEmpty. Operand 13252 states and 47761 transitions. [2021-08-21 13:01:40,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 13:01:40,893 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:40,893 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:40,923 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 13:01:41,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:41,094 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:01:41,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:41,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1112798758, now seen corresponding path program 55 times [2021-08-21 13:01:41,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:41,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585401792] [2021-08-21 13:01:41,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:41,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 13:01:41,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:41,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585401792] [2021-08-21 13:01:41,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585401792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:41,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404876054] [2021-08-21 13:01:41,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:01:41,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:41,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:41,147 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 13:01:41,147 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 13:01:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:44,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:01:44,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 13:01:45,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404876054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:45,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:45,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 13:01:45,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800937785] [2021-08-21 13:01:45,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:01:45,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:45,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:01:45,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:01:45,030 INFO L87 Difference]: Start difference. First operand 13252 states and 47761 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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 13:01:45,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:45,232 INFO L93 Difference]: Finished difference Result 24538 states and 87455 transitions. [2021-08-21 13:01:45,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 13:01:45,233 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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 36 [2021-08-21 13:01:45,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:45,298 INFO L225 Difference]: With dead ends: 24538 [2021-08-21 13:01:45,298 INFO L226 Difference]: Without dead ends: 23792 [2021-08-21 13:01:45,298 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:01:45,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23792 states. [2021-08-21 13:01:45,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23792 to 20695. [2021-08-21 13:01:45,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20695 states, 20694 states have (on average 3.6553590412680004) internal successors, (75644), 20694 states have internal predecessors, (75644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:45,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20695 states to 20695 states and 75644 transitions. [2021-08-21 13:01:45,755 INFO L78 Accepts]: Start accepts. Automaton has 20695 states and 75644 transitions. Word has length 36 [2021-08-21 13:01:45,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:45,755 INFO L470 AbstractCegarLoop]: Abstraction has 20695 states and 75644 transitions. [2021-08-21 13:01:45,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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 13:01:45,755 INFO L276 IsEmpty]: Start isEmpty. Operand 20695 states and 75644 transitions. [2021-08-21 13:01:45,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 13:01:45,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:45,787 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:45,818 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 13:01:46,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:46,009 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:01:46,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:46,009 INFO L82 PathProgramCache]: Analyzing trace with hash -467548764, now seen corresponding path program 56 times [2021-08-21 13:01:46,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:46,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237773482] [2021-08-21 13:01:46,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:46,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:46,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:46,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237773482] [2021-08-21 13:01:46,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237773482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:46,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193738847] [2021-08-21 13:01:46,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:01:46,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:46,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:46,066 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 13:01:46,067 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 13:01:49,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:01:49,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:49,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:01:49,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:01:50,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193738847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:50,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:50,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-08-21 13:01:50,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138565813] [2021-08-21 13:01:50,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:01:50,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:50,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:01:50,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:01:50,065 INFO L87 Difference]: Start difference. First operand 20695 states and 75644 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 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 13:01:50,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:50,334 INFO L93 Difference]: Finished difference Result 21084 states and 73202 transitions. [2021-08-21 13:01:50,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:01:50,335 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 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 36 [2021-08-21 13:01:50,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:50,385 INFO L225 Difference]: With dead ends: 21084 [2021-08-21 13:01:50,386 INFO L226 Difference]: Without dead ends: 20631 [2021-08-21 13:01:50,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-08-21 13:01:50,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20631 states. [2021-08-21 13:01:50,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20631 to 16561. [2021-08-21 13:01:50,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16561 states, 16560 states have (on average 3.603743961352657) internal successors, (59678), 16560 states have internal predecessors, (59678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:50,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16561 states to 16561 states and 59678 transitions. [2021-08-21 13:01:50,721 INFO L78 Accepts]: Start accepts. Automaton has 16561 states and 59678 transitions. Word has length 36 [2021-08-21 13:01:50,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:50,721 INFO L470 AbstractCegarLoop]: Abstraction has 16561 states and 59678 transitions. [2021-08-21 13:01:50,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 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 13:01:50,721 INFO L276 IsEmpty]: Start isEmpty. Operand 16561 states and 59678 transitions. [2021-08-21 13:01:50,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 13:01:50,752 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:50,753 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:50,783 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 13:01:50,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:50,953 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:01:50,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:50,953 INFO L82 PathProgramCache]: Analyzing trace with hash -180840572, now seen corresponding path program 57 times [2021-08-21 13:01:50,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:50,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766811863] [2021-08-21 13:01:50,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:50,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:51,007 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 13:01:51,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:51,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766811863] [2021-08-21 13:01:51,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766811863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:51,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036606193] [2021-08-21 13:01:51,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:01:51,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:51,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:51,009 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 13:01:51,032 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 13:01:54,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 13:01:54,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:54,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 13:01:54,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:01:55,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036606193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:55,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:55,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 14 [2021-08-21 13:01:55,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901639688] [2021-08-21 13:01:55,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 13:01:55,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:55,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 13:01:55,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:01:55,038 INFO L87 Difference]: Start difference. First operand 16561 states and 59678 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:56,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:56,552 INFO L93 Difference]: Finished difference Result 28120 states and 95536 transitions. [2021-08-21 13:01:56,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-21 13:01:56,552 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 13:01:56,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:56,627 INFO L225 Difference]: With dead ends: 28120 [2021-08-21 13:01:56,627 INFO L226 Difference]: Without dead ends: 28120 [2021-08-21 13:01:56,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3399 ImplicationChecksByTransitivity, 925.1ms TimeCoverageRelationStatistics Valid=1541, Invalid=7201, Unknown=0, NotChecked=0, Total=8742 [2021-08-21 13:01:56,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28120 states. [2021-08-21 13:01:56,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28120 to 15841. [2021-08-21 13:01:56,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15841 states, 15840 states have (on average 3.5958964646464646) internal successors, (56959), 15840 states have internal predecessors, (56959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:57,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15841 states to 15841 states and 56959 transitions. [2021-08-21 13:01:57,026 INFO L78 Accepts]: Start accepts. Automaton has 15841 states and 56959 transitions. Word has length 38 [2021-08-21 13:01:57,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:57,026 INFO L470 AbstractCegarLoop]: Abstraction has 15841 states and 56959 transitions. [2021-08-21 13:01:57,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:57,027 INFO L276 IsEmpty]: Start isEmpty. Operand 15841 states and 56959 transitions. [2021-08-21 13:01:57,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 13:01:57,053 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:57,054 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:57,083 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 13:01:57,256 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,SelfDestructingSolverStorable62 [2021-08-21 13:01:57,257 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:01:57,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:57,257 INFO L82 PathProgramCache]: Analyzing trace with hash 2082699614, now seen corresponding path program 58 times [2021-08-21 13:01:57,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:57,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278409278] [2021-08-21 13:01:57,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:57,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:57,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 13:01:57,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:57,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278409278] [2021-08-21 13:01:57,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278409278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:57,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084072818] [2021-08-21 13:01:57,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:01:57,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:57,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:57,314 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 13:01:57,315 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 13:02:01,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:02:01,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:02:01,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:02:01,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 13:02:01,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084072818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:01,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:01,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 13:02:01,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149989400] [2021-08-21 13:02:01,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:02:01,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:01,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:02:01,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:02:01,237 INFO L87 Difference]: Start difference. First operand 15841 states and 56959 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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 13:02:01,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:01,441 INFO L93 Difference]: Finished difference Result 19887 states and 69566 transitions. [2021-08-21 13:02:01,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 13:02:01,441 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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 38 [2021-08-21 13:02:01,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:01,490 INFO L225 Difference]: With dead ends: 19887 [2021-08-21 13:02:01,490 INFO L226 Difference]: Without dead ends: 19887 [2021-08-21 13:02:01,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:02:01,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19887 states. [2021-08-21 13:02:01,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19887 to 14482. [2021-08-21 13:02:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14482 states, 14481 states have (on average 3.5768248049167877) internal successors, (51796), 14481 states have internal predecessors, (51796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:01,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14482 states to 14482 states and 51796 transitions. [2021-08-21 13:02:01,763 INFO L78 Accepts]: Start accepts. Automaton has 14482 states and 51796 transitions. Word has length 38 [2021-08-21 13:02:01,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:01,763 INFO L470 AbstractCegarLoop]: Abstraction has 14482 states and 51796 transitions. [2021-08-21 13:02:01,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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 13:02:01,764 INFO L276 IsEmpty]: Start isEmpty. Operand 14482 states and 51796 transitions. [2021-08-21 13:02:01,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 13:02:01,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:01,787 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:01,817 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 13:02:01,992 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,SelfDestructingSolverStorable63 [2021-08-21 13:02:01,993 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:02:01,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:01,993 INFO L82 PathProgramCache]: Analyzing trace with hash 164530390, now seen corresponding path program 59 times [2021-08-21 13:02:01,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:01,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744234140] [2021-08-21 13:02:01,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:01,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:23,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:23,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744234140] [2021-08-21 13:02:23,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744234140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:23,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631712388] [2021-08-21 13:02:23,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:02:23,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:23,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:23,822 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 13:02:23,822 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 13:02:27,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:02:27,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:02:27,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 13:02:27,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:30,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 13:02:31,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:31,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-21 13:02:31,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:31,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:31,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:31,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:31,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:31,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:02:31,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 446 treesize of output 362 [2021-08-21 13:02:31,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:31,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:31,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:31,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:31,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:31,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:02:31,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 498 treesize of output 362 [2021-08-21 13:02:31,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:31,701 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-08-21 13:02:31,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 362 treesize of output 315 [2021-08-21 13:02:41,348 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 13:02:41,348 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 164 treesize of output 115 [2021-08-21 13:02:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:41,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631712388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:41,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:41,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-08-21 13:02:41,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888026099] [2021-08-21 13:02:41,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 13:02:41,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:41,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 13:02:41,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:02:41,392 INFO L87 Difference]: Start difference. First operand 14482 states and 51796 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:46,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:46,788 INFO L93 Difference]: Finished difference Result 23975 states and 81117 transitions. [2021-08-21 13:02:46,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-21 13:02:46,789 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-21 13:02:46,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:46,841 INFO L225 Difference]: With dead ends: 23975 [2021-08-21 13:02:46,842 INFO L226 Difference]: Without dead ends: 23216 [2021-08-21 13:02:46,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 4576.0ms TimeCoverageRelationStatistics Valid=703, Invalid=5149, Unknown=0, NotChecked=0, Total=5852 [2021-08-21 13:02:46,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23216 states. [2021-08-21 13:02:47,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23216 to 15817. [2021-08-21 13:02:47,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15817 states, 15816 states have (on average 3.5506449165402123) internal successors, (56157), 15816 states have internal predecessors, (56157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:47,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15817 states to 15817 states and 56157 transitions. [2021-08-21 13:02:47,164 INFO L78 Accepts]: Start accepts. Automaton has 15817 states and 56157 transitions. Word has length 40 [2021-08-21 13:02:47,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:47,165 INFO L470 AbstractCegarLoop]: Abstraction has 15817 states and 56157 transitions. [2021-08-21 13:02:47,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:47,165 INFO L276 IsEmpty]: Start isEmpty. Operand 15817 states and 56157 transitions. [2021-08-21 13:02:47,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 13:02:47,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:47,190 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:47,221 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 13:02:47,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:47,391 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:02:47,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:47,391 INFO L82 PathProgramCache]: Analyzing trace with hash -130132196, now seen corresponding path program 60 times [2021-08-21 13:02:47,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:47,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942968392] [2021-08-21 13:02:47,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:47,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:48,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:48,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942968392] [2021-08-21 13:02:48,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942968392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:48,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131487070] [2021-08-21 13:02:48,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:02:48,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:48,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:48,775 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 13:02:48,776 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 13:02:53,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:02:53,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:02:53,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 13:02:53,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:55,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 13:02:56,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:56,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-08-21 13:02:58,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:58,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:58,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:58,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:58,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:58,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 443 treesize of output 329 [2021-08-21 13:02:58,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:58,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:58,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:58,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:58,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:58,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 425 treesize of output 269 [2021-08-21 13:02:58,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:58,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:58,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:02:58,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 269 treesize of output 232 [2021-08-21 13:03:00,499 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:03:00,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 89 [2021-08-21 13:03:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:00,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131487070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:00,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:03:00,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 29 [2021-08-21 13:03:00,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917155177] [2021-08-21 13:03:00,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 13:03:00,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:03:00,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 13:03:00,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:03:00,799 INFO L87 Difference]: Start difference. First operand 15817 states and 56157 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:06,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:03:06,109 INFO L93 Difference]: Finished difference Result 23609 states and 81316 transitions. [2021-08-21 13:03:06,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 13:03:06,109 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-21 13:03:06,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:03:06,165 INFO L225 Difference]: With dead ends: 23609 [2021-08-21 13:03:06,165 INFO L226 Difference]: Without dead ends: 23388 [2021-08-21 13:03:06,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 4660.7ms TimeCoverageRelationStatistics Valid=564, Invalid=3342, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 13:03:06,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23388 states. [2021-08-21 13:03:06,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23388 to 15954. [2021-08-21 13:03:06,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15954 states, 15953 states have (on average 3.548486178148311) internal successors, (56609), 15953 states have internal predecessors, (56609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:06,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15954 states to 15954 states and 56609 transitions. [2021-08-21 13:03:06,504 INFO L78 Accepts]: Start accepts. Automaton has 15954 states and 56609 transitions. Word has length 40 [2021-08-21 13:03:06,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:03:06,504 INFO L470 AbstractCegarLoop]: Abstraction has 15954 states and 56609 transitions. [2021-08-21 13:03:06,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:06,504 INFO L276 IsEmpty]: Start isEmpty. Operand 15954 states and 56609 transitions. [2021-08-21 13:03:06,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 13:03:06,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:03:06,530 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:03:06,562 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 13:03:06,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:03:06,730 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:03:06,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:03:06,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1066180246, now seen corresponding path program 61 times [2021-08-21 13:03:06,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:03:06,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808245643] [2021-08-21 13:03:06,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:03:06,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:03:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:20,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:20,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808245643] [2021-08-21 13:06:20,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808245643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:20,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030225560] [2021-08-21 13:06:20,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:06:20,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:20,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:20,271 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 13:06:20,272 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 13:06:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:25,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 13:06:25,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:27,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 13:06:28,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:06:28,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-08-21 13:06:31,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 375 treesize of output 289 [2021-08-21 13:06:31,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 391 treesize of output 281 [2021-08-21 13:06:31,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 281 treesize of output 246 [2021-08-21 13:06:33,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 137 [2021-08-21 13:06:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:33,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030225560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:33,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:06:33,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-08-21 13:06:33,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916536340] [2021-08-21 13:06:33,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 13:06:33,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:33,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 13:06:33,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:06:33,751 INFO L87 Difference]: Start difference. First operand 15954 states and 56609 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:36,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:36,552 INFO L93 Difference]: Finished difference Result 23595 states and 81620 transitions. [2021-08-21 13:06:36,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:06:36,552 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-21 13:06:36,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:36,608 INFO L225 Difference]: With dead ends: 23595 [2021-08-21 13:06:36,608 INFO L226 Difference]: Without dead ends: 23374 [2021-08-21 13:06:36,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 2876.6ms TimeCoverageRelationStatistics Valid=256, Invalid=1226, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:06:36,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23374 states. [2021-08-21 13:06:36,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23374 to 16041. [2021-08-21 13:06:36,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16041 states, 16040 states have (on average 3.5463840399002495) internal successors, (56884), 16040 states have internal predecessors, (56884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:36,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16041 states to 16041 states and 56884 transitions. [2021-08-21 13:06:36,998 INFO L78 Accepts]: Start accepts. Automaton has 16041 states and 56884 transitions. Word has length 40 [2021-08-21 13:06:36,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:36,998 INFO L470 AbstractCegarLoop]: Abstraction has 16041 states and 56884 transitions. [2021-08-21 13:06:36,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:36,998 INFO L276 IsEmpty]: Start isEmpty. Operand 16041 states and 56884 transitions. [2021-08-21 13:06:37,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 13:06:37,025 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:37,025 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:37,060 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 13:06:37,225 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,SelfDestructingSolverStorable66 [2021-08-21 13:06:37,225 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:06:37,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:37,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1066497056, now seen corresponding path program 62 times [2021-08-21 13:06:37,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:37,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266208946] [2021-08-21 13:06:37,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:37,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:06:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:40,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:06:40,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266208946] [2021-08-21 13:06:40,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266208946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:40,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575375225] [2021-08-21 13:06:40,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:06:40,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:06:40,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:06:40,572 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 13:06:40,572 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 13:06:46,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:06:46,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:06:46,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-21 13:06:46,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:06:49,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 13:06:50,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:06:50,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 45 [2021-08-21 13:06:51,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 379 treesize of output 293 [2021-08-21 13:06:51,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 395 treesize of output 283 [2021-08-21 13:06:51,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 283 treesize of output 250 [2021-08-21 13:06:54,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:06:54,131 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 181 treesize of output 147 [2021-08-21 13:06:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:06:54,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575375225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:06:54,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:06:54,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2021-08-21 13:06:54,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661063874] [2021-08-21 13:06:54,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 13:06:54,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:06:54,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 13:06:54,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:06:54,490 INFO L87 Difference]: Start difference. First operand 16041 states and 56884 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:56,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:56,493 INFO L93 Difference]: Finished difference Result 24625 states and 85102 transitions. [2021-08-21 13:06:56,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:06:56,493 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-21 13:06:56,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:56,562 INFO L225 Difference]: With dead ends: 24625 [2021-08-21 13:06:56,562 INFO L226 Difference]: Without dead ends: 24365 [2021-08-21 13:06:56,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 2094.5ms TimeCoverageRelationStatistics Valid=256, Invalid=1304, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 13:06:56,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24365 states. [2021-08-21 13:06:56,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24365 to 16117. [2021-08-21 13:06:56,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16117 states, 16116 states have (on average 3.545234549516009) internal successors, (57135), 16116 states have internal predecessors, (57135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:56,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16117 states to 16117 states and 57135 transitions. [2021-08-21 13:06:56,897 INFO L78 Accepts]: Start accepts. Automaton has 16117 states and 57135 transitions. Word has length 40 [2021-08-21 13:06:56,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:06:56,897 INFO L470 AbstractCegarLoop]: Abstraction has 16117 states and 57135 transitions. [2021-08-21 13:06:56,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:56,897 INFO L276 IsEmpty]: Start isEmpty. Operand 16117 states and 57135 transitions. [2021-08-21 13:06:56,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 13:06:56,996 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:06:56,996 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:06:57,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-21 13:06:57,196 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,SelfDestructingSolverStorable67 [2021-08-21 13:06:57,196 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:06:57,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:06:57,199 INFO L82 PathProgramCache]: Analyzing trace with hash -2032157798, now seen corresponding path program 63 times [2021-08-21 13:06:57,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:06:57,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170767584] [2021-08-21 13:06:57,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:06:57,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:06:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:07:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:07:14,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:07:14,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170767584] [2021-08-21 13:07:14,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170767584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:07:14,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335464986] [2021-08-21 13:07:14,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:07:14,783 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:07:14,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:07:14,784 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 13:07:14,784 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 13:07:20,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:07:20,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:07:20,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 13:07:20,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:08:18,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 13:08:52,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:08:52,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-08-21 13:09:40,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:09:40,729 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 419 treesize of output 387 [2021-08-21 13:09:40,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:09:40,779 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 519 treesize of output 445 [2021-08-21 13:09:40,802 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-08-21 13:09:40,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 445 treesize of output 402 Received shutdown request... [2021-08-21 13:09:59,671 WARN L223 SmtUtils]: Removed 1 from assertion stack [2021-08-21 13:09:59,673 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 13:09:59,707 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 13:09:59,708 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 13:09:59,711 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 13:09:59,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:09:59,874 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 41 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 4ms.. [2021-08-21 13:09:59,876 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 13:09:59,876 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 13:09:59,876 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 13:09:59,880 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 13:09:59,880 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 13:09:59,881 INFO L202 PluginConnector]: Adding new model three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:09:59 BasicIcfg [2021-08-21 13:09:59,881 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 13:09:59,882 INFO L168 Benchmark]: Toolchain (without parser) took 782624.53 ms. Allocated memory was 218.1 MB in the beginning and 2.7 GB in the end (delta: 2.4 GB). Free memory was 197.6 MB in the beginning and 884.3 MB in the end (delta: -686.7 MB). Peak memory consumption was 2.1 GB. Max. memory is 8.0 GB. [2021-08-21 13:09:59,882 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 218.1 MB. Free memory is still 198.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 13:09:59,882 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.45 ms. Allocated memory is still 218.1 MB. Free memory was 197.5 MB in the beginning and 196.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-08-21 13:09:59,883 INFO L168 Benchmark]: Boogie Preprocessor took 10.94 ms. Allocated memory is still 218.1 MB. Free memory was 196.0 MB in the beginning and 195.0 MB in the end (delta: 947.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 13:09:59,883 INFO L168 Benchmark]: RCFGBuilder took 190.56 ms. Allocated memory is still 218.1 MB. Free memory was 195.0 MB in the beginning and 180.1 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-08-21 13:09:59,883 INFO L168 Benchmark]: TraceAbstraction took 782402.36 ms. Allocated memory was 218.1 MB in the beginning and 2.7 GB in the end (delta: 2.4 GB). Free memory was 179.6 MB in the beginning and 884.3 MB in the end (delta: -704.7 MB). Peak memory consumption was 2.1 GB. Max. memory is 8.0 GB. [2021-08-21 13:09:59,883 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 218.1 MB. Free memory is still 198.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 17.45 ms. Allocated memory is still 218.1 MB. Free memory was 197.5 MB in the beginning and 196.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 10.94 ms. Allocated memory is still 218.1 MB. Free memory was 196.0 MB in the beginning and 195.0 MB in the end (delta: 947.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 190.56 ms. Allocated memory is still 218.1 MB. Free memory was 195.0 MB in the beginning and 180.1 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 782402.36 ms. Allocated memory was 218.1 MB in the beginning and 2.7 GB in the end (delta: 2.4 GB). Free memory was 179.6 MB in the beginning and 884.3 MB in the end (delta: -704.7 MB). Peak memory consumption was 2.1 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 41 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 4ms.. - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 41 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 4ms.. - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 41 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 4ms.. - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 41 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 4ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 782323.2ms, OverallIterations: 69, TraceHistogramMax: 3, EmptinessCheckTime: 851.4ms, AutomataDifference: 75112.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 38.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2887 SDtfs, 13504 SDslu, 19327 SDs, 0 SdLazy, 44123 SolverSat, 2597 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 24548.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3603 GetRequests, 1655 SyntacticMatches, 42 SemanticMatches, 1906 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25202 ImplicationChecksByTransitivity, 61075.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20695occurred in iteration=61, InterpolantAutomatonStates: 1585, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 9685.7ms AutomataMinimizationTime, 68 MinimizatonAttempts, 218978 StatesRemovedByMinimization, 68 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 256.6ms SsaConstructionTime, 1566.7ms SatisfiabilityAnalysisTime, 366193.8ms InterpolantComputationTime, 4249 NumberOfCodeBlocks, 4247 NumberOfCodeBlocksAsserted, 221 NumberOfCheckSat, 4118 ConstructedInterpolants, 48 QuantifiedInterpolants, 146564 SizeOfPredicates, 189 NumberOfNonLiveVariables, 5436 ConjunctsInSsa, 1267 ConjunctsInUnsatCore, 131 InterpolantComputations, 5 PerfectInterpolantSequences, 454/1739 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