/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-bad/counter-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 16:32:33,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 16:32:33,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 16:32:33,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 16:32:33,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 16:32:33,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 16:32:33,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 16:32:33,766 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 [2022-03-15 16:32:33,793 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 16:32:33,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 16:32:33,793 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 16:32:33,793 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 16:32:33,794 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 16:32:33,794 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 16:32:33,794 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 16:32:33,795 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 16:32:33,795 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 16:32:33,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 16:32:33,795 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 16:32:33,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 16:32:33,796 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 16:32:33,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 16:32:33,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 16:32:33,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 16:32:33,796 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 16:32:33,796 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 16:32:33,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 16:32:33,796 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 16:32:33,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 16:32:33,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 16:32:33,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 16:32:33,796 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 16:32:33,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 16:32:33,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:32:33,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 16:32:33,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 16:32:33,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 16:32:33,798 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 16:32:33,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 16:32:33,798 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 16:32:33,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 16:32:33,798 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 16:32:34,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 16:32:34,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 16:32:34,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 16:32:34,025 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 16:32:34,025 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 16:32:34,026 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl [2022-03-15 16:32:34,027 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl' [2022-03-15 16:32:34,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 16:32:34,046 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 16:32:34,047 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 16:32:34,047 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 16:32:34,047 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 16:32:34,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:32:34" (1/1) ... [2022-03-15 16:32:34,060 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:32:34" (1/1) ... [2022-03-15 16:32:34,065 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 16:32:34,066 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 16:32:34,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 16:32:34,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 16:32:34,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 16:32:34,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:32:34" (1/1) ... [2022-03-15 16:32:34,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:32:34" (1/1) ... [2022-03-15 16:32:34,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:32:34" (1/1) ... [2022-03-15 16:32:34,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:32:34" (1/1) ... [2022-03-15 16:32:34,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:32:34" (1/1) ... [2022-03-15 16:32:34,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:32:34" (1/1) ... [2022-03-15 16:32:34,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:32:34" (1/1) ... [2022-03-15 16:32:34,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 16:32:34,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 16:32:34,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 16:32:34,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 16:32:34,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:32:34" (1/1) ... [2022-03-15 16:32:34,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:32:34,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:34,110 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) [2022-03-15 16:32:34,128 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 [2022-03-15 16:32:34,140 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 16:32:34,140 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 16:32:34,140 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 16:32:34,140 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 16:32:34,140 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 16:32:34,140 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 16:32:34,140 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 16:32:34,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 16:32:34,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 16:32:34,141 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 16:32:34,172 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 16:32:34,173 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 16:32:34,252 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 16:32:34,261 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 16:32:34,261 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 16:32:34,262 INFO L202 PluginConnector]: Adding new model counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:32:34 BoogieIcfgContainer [2022-03-15 16:32:34,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 16:32:34,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 16:32:34,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 16:32:34,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 16:32:34,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:32:34" (1/2) ... [2022-03-15 16:32:34,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d8de79 and model type counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 04:32:34, skipping insertion in model container [2022-03-15 16:32:34,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:32:34" (2/2) ... [2022-03-15 16:32:34,268 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-queue.wvr.bpl [2022-03-15 16:32:34,272 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 16:32:34,272 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 16:32:34,272 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 16:32:34,272 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 16:32:34,300 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 16:32:34,335 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 16:32:34,339 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, 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, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 16:32:34,340 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 16:32:34,346 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2022-03-15 16:32:34,357 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-03-15 16:32:34,358 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2022-03-15 16:32:34,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 16:32:34,363 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:34,363 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:34,364 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:34,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:34,367 INFO L85 PathProgramCache]: Analyzing trace with hash 160243872, now seen corresponding path program 1 times [2022-03-15 16:32:34,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:34,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844679080] [2022-03-15 16:32:34,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:34,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:34,501 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:34,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844679080] [2022-03-15 16:32:34,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844679080] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:32:34,503 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:32:34,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:32:34,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642796200] [2022-03-15 16:32:34,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:32:34,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:32:34,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:34,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:32:34,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:32:34,550 INFO L87 Difference]: Start difference. First operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:34,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:34,607 INFO L93 Difference]: Finished difference Result 57 states and 105 transitions. [2022-03-15 16:32:34,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:32:34,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 16:32:34,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:34,615 INFO L225 Difference]: With dead ends: 57 [2022-03-15 16:32:34,615 INFO L226 Difference]: Without dead ends: 50 [2022-03-15 16:32:34,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:32:34,619 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:34,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:32:34,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-15 16:32:34,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-03-15 16:32:34,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:34,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 74 transitions. [2022-03-15 16:32:34,679 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 74 transitions. Word has length 14 [2022-03-15 16:32:34,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:34,679 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 74 transitions. [2022-03-15 16:32:34,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:34,679 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 74 transitions. [2022-03-15 16:32:34,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 16:32:34,680 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:34,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:34,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 16:32:34,680 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:34,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:34,681 INFO L85 PathProgramCache]: Analyzing trace with hash 2122570142, now seen corresponding path program 1 times [2022-03-15 16:32:34,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:34,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792486891] [2022-03-15 16:32:34,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:34,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:34,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:34,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792486891] [2022-03-15 16:32:34,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792486891] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:34,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911883489] [2022-03-15 16:32:34,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:34,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:34,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:34,811 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) [2022-03-15 16:32:34,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 16:32:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:34,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:32:34,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:35,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:35,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911883489] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:35,140 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 16:32:35,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2022-03-15 16:32:35,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579248757] [2022-03-15 16:32:35,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:32:35,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:32:35,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:35,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:32:35,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:32:35,142 INFO L87 Difference]: Start difference. First operand 41 states and 74 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:35,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:35,262 INFO L93 Difference]: Finished difference Result 76 states and 130 transitions. [2022-03-15 16:32:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 16:32:35,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 16:32:35,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:35,264 INFO L225 Difference]: With dead ends: 76 [2022-03-15 16:32:35,264 INFO L226 Difference]: Without dead ends: 76 [2022-03-15 16:32:35,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:32:35,265 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:35,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 33 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:32:35,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-15 16:32:35,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 41. [2022-03-15 16:32:35,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:35,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2022-03-15 16:32:35,271 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 16 [2022-03-15 16:32:35,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:35,271 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2022-03-15 16:32:35,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:35,272 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2022-03-15 16:32:35,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 16:32:35,272 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:35,272 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:35,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 16:32:35,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:35,488 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:35,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:35,488 INFO L85 PathProgramCache]: Analyzing trace with hash 834689058, now seen corresponding path program 1 times [2022-03-15 16:32:35,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:35,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321156388] [2022-03-15 16:32:35,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:35,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:35,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:35,532 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:35,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321156388] [2022-03-15 16:32:35,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321156388] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:32:35,533 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:32:35,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 16:32:35,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77704224] [2022-03-15 16:32:35,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:32:35,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:32:35,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:35,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:32:35,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:32:35,538 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:35,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:35,614 INFO L93 Difference]: Finished difference Result 71 states and 125 transitions. [2022-03-15 16:32:35,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:32:35,615 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 16:32:35,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:35,617 INFO L225 Difference]: With dead ends: 71 [2022-03-15 16:32:35,617 INFO L226 Difference]: Without dead ends: 66 [2022-03-15 16:32:35,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:32:35,620 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:35,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 31 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:32:35,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-15 16:32:35,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2022-03-15 16:32:35,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 48 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:35,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 91 transitions. [2022-03-15 16:32:35,639 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 91 transitions. Word has length 16 [2022-03-15 16:32:35,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:35,639 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 91 transitions. [2022-03-15 16:32:35,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:35,639 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 91 transitions. [2022-03-15 16:32:35,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 16:32:35,641 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:35,641 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:35,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 16:32:35,641 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:35,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:35,643 INFO L85 PathProgramCache]: Analyzing trace with hash -999603742, now seen corresponding path program 2 times [2022-03-15 16:32:35,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:35,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913610927] [2022-03-15 16:32:35,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:35,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:35,710 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:35,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913610927] [2022-03-15 16:32:35,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913610927] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:32:35,710 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:32:35,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 16:32:35,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758560430] [2022-03-15 16:32:35,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:32:35,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:32:35,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:35,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:32:35,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:32:35,711 INFO L87 Difference]: Start difference. First operand 49 states and 91 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:35,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:35,789 INFO L93 Difference]: Finished difference Result 51 states and 94 transitions. [2022-03-15 16:32:35,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:32:35,790 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 16:32:35,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:35,790 INFO L225 Difference]: With dead ends: 51 [2022-03-15 16:32:35,790 INFO L226 Difference]: Without dead ends: 51 [2022-03-15 16:32:35,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:32:35,791 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:35,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:32:35,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-15 16:32:35,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2022-03-15 16:32:35,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:35,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 79 transitions. [2022-03-15 16:32:35,794 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 79 transitions. Word has length 16 [2022-03-15 16:32:35,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:35,794 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 79 transitions. [2022-03-15 16:32:35,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:35,794 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 79 transitions. [2022-03-15 16:32:35,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 16:32:35,795 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:35,795 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:35,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 16:32:35,795 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:35,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:35,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1331282530, now seen corresponding path program 2 times [2022-03-15 16:32:35,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:35,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093264069] [2022-03-15 16:32:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:35,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:35,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:35,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093264069] [2022-03-15 16:32:35,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093264069] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:32:35,841 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:32:35,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 16:32:35,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151236117] [2022-03-15 16:32:35,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:32:35,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:32:35,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:35,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:32:35,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:32:35,843 INFO L87 Difference]: Start difference. First operand 43 states and 79 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:35,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:35,892 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2022-03-15 16:32:35,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:32:35,892 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 16:32:35,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:35,893 INFO L225 Difference]: With dead ends: 51 [2022-03-15 16:32:35,893 INFO L226 Difference]: Without dead ends: 49 [2022-03-15 16:32:35,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:32:35,894 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:35,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 19 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:32:35,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-15 16:32:35,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2022-03-15 16:32:35,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:35,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 78 transitions. [2022-03-15 16:32:35,896 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 78 transitions. Word has length 16 [2022-03-15 16:32:35,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:35,897 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 78 transitions. [2022-03-15 16:32:35,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:35,897 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 78 transitions. [2022-03-15 16:32:35,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:32:35,897 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:35,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:35,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-15 16:32:35,899 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:35,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:35,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1139591584, now seen corresponding path program 1 times [2022-03-15 16:32:35,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:35,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355728386] [2022-03-15 16:32:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:35,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:36,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:36,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355728386] [2022-03-15 16:32:36,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355728386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:36,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177686492] [2022-03-15 16:32:36,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:36,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:36,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:36,009 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) [2022-03-15 16:32:36,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 16:32:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:36,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:32:36,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:36,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:36,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-15 16:32:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:36,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:36,387 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:32:36,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2022-03-15 16:32:36,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-03-15 16:32:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:36,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177686492] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:36,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:36,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-03-15 16:32:36,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41297068] [2022-03-15 16:32:36,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:36,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:32:36,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:36,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:32:36,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:32:36,452 INFO L87 Difference]: Start difference. First operand 43 states and 78 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:36,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:36,490 INFO L93 Difference]: Finished difference Result 84 states and 161 transitions. [2022-03-15 16:32:36,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:32:36,490 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:32:36,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:36,492 INFO L225 Difference]: With dead ends: 84 [2022-03-15 16:32:36,492 INFO L226 Difference]: Without dead ends: 77 [2022-03-15 16:32:36,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:32:36,496 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:36,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 55 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2022-03-15 16:32:36,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-15 16:32:36,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 57. [2022-03-15 16:32:36,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.9642857142857142) internal successors, (110), 56 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:36,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 110 transitions. [2022-03-15 16:32:36,508 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 110 transitions. Word has length 18 [2022-03-15 16:32:36,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:36,509 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 110 transitions. [2022-03-15 16:32:36,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:36,509 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 110 transitions. [2022-03-15 16:32:36,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:32:36,509 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:36,509 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:36,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 16:32:36,710 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,SelfDestructingSolverStorable5 [2022-03-15 16:32:36,710 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:36,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:36,710 INFO L85 PathProgramCache]: Analyzing trace with hash -2098687768, now seen corresponding path program 2 times [2022-03-15 16:32:36,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:36,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964507335] [2022-03-15 16:32:36,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:36,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:36,807 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:36,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964507335] [2022-03-15 16:32:36,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964507335] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:36,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203380880] [2022-03-15 16:32:36,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:32:36,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:36,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:36,808 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) [2022-03-15 16:32:36,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 16:32:36,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:32:36,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:32:36,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:32:36,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:36,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:36,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-15 16:32:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:37,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:37,062 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:32:37,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2022-03-15 16:32:37,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-03-15 16:32:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:37,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203380880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:37,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:37,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-03-15 16:32:37,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178360490] [2022-03-15 16:32:37,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:37,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:32:37,113 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:37,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:32:37,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:32:37,113 INFO L87 Difference]: Start difference. First operand 57 states and 110 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:37,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:37,137 INFO L93 Difference]: Finished difference Result 82 states and 153 transitions. [2022-03-15 16:32:37,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:32:37,137 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:32:37,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:37,138 INFO L225 Difference]: With dead ends: 82 [2022-03-15 16:32:37,138 INFO L226 Difference]: Without dead ends: 79 [2022-03-15 16:32:37,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:32:37,139 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:37,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 66 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 28 Unchecked, 0.0s Time] [2022-03-15 16:32:37,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-15 16:32:37,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2022-03-15 16:32:37,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:37,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2022-03-15 16:32:37,147 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 18 [2022-03-15 16:32:37,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:37,147 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2022-03-15 16:32:37,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:37,148 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2022-03-15 16:32:37,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:32:37,148 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:37,148 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:37,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 16:32:37,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:37,363 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:37,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:37,364 INFO L85 PathProgramCache]: Analyzing trace with hash 402122286, now seen corresponding path program 3 times [2022-03-15 16:32:37,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:37,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250418396] [2022-03-15 16:32:37,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:37,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:37,435 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:37,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250418396] [2022-03-15 16:32:37,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250418396] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:37,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233282716] [2022-03-15 16:32:37,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:32:37,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:37,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:37,472 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) [2022-03-15 16:32:37,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 16:32:37,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:32:37,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:32:37,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:32:37,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:37,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:37,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-15 16:32:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:37,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:37,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:32:37,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2022-03-15 16:32:37,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-03-15 16:32:37,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:37,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233282716] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:37,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:37,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-03-15 16:32:37,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781608784] [2022-03-15 16:32:37,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:37,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:32:37,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:37,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:32:37,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:32:37,722 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:37,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:37,761 INFO L93 Difference]: Finished difference Result 94 states and 180 transitions. [2022-03-15 16:32:37,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:32:37,761 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:32:37,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:37,762 INFO L225 Difference]: With dead ends: 94 [2022-03-15 16:32:37,762 INFO L226 Difference]: Without dead ends: 87 [2022-03-15 16:32:37,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:32:37,762 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:37,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:32:37,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-15 16:32:37,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 65. [2022-03-15 16:32:37,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.9375) internal successors, (124), 64 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:37,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 124 transitions. [2022-03-15 16:32:37,777 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 124 transitions. Word has length 18 [2022-03-15 16:32:37,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:37,778 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 124 transitions. [2022-03-15 16:32:37,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:37,778 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 124 transitions. [2022-03-15 16:32:37,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:32:37,782 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:37,782 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:37,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 16:32:37,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:37,998 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:37,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:37,998 INFO L85 PathProgramCache]: Analyzing trace with hash 2093142942, now seen corresponding path program 4 times [2022-03-15 16:32:37,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:37,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434895041] [2022-03-15 16:32:37,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:37,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:38,069 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:38,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434895041] [2022-03-15 16:32:38,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434895041] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:38,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641812760] [2022-03-15 16:32:38,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:32:38,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:38,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:38,070 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) [2022-03-15 16:32:38,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 16:32:38,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:32:38,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:32:38,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:32:38,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:38,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:38,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:38,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641812760] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:38,273 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:38,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-03-15 16:32:38,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208274539] [2022-03-15 16:32:38,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:38,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:32:38,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:38,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:32:38,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:32:38,275 INFO L87 Difference]: Start difference. First operand 65 states and 124 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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) [2022-03-15 16:32:38,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:38,619 INFO L93 Difference]: Finished difference Result 189 states and 352 transitions. [2022-03-15 16:32:38,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:32:38,619 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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 20 [2022-03-15 16:32:38,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:38,620 INFO L225 Difference]: With dead ends: 189 [2022-03-15 16:32:38,620 INFO L226 Difference]: Without dead ends: 189 [2022-03-15 16:32:38,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:32:38,621 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 110 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:38,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 143 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:32:38,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-15 16:32:38,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 73. [2022-03-15 16:32:38,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0833333333333335) internal successors, (150), 72 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:38,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 150 transitions. [2022-03-15 16:32:38,624 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 150 transitions. Word has length 20 [2022-03-15 16:32:38,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:38,625 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 150 transitions. [2022-03-15 16:32:38,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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) [2022-03-15 16:32:38,625 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 150 transitions. [2022-03-15 16:32:38,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:32:38,625 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:38,625 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:38,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 16:32:38,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:38,836 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:38,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:38,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1390002466, now seen corresponding path program 5 times [2022-03-15 16:32:38,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:38,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299143357] [2022-03-15 16:32:38,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:38,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:38,894 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:38,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299143357] [2022-03-15 16:32:38,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299143357] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:38,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955834203] [2022-03-15 16:32:38,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:32:38,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:38,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:38,895 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) [2022-03-15 16:32:38,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 16:32:38,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:32:38,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:32:38,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:32:38,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:38,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:39,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955834203] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:39,049 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:39,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 16:32:39,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501633541] [2022-03-15 16:32:39,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:39,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:32:39,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:39,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:32:39,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:32:39,051 INFO L87 Difference]: Start difference. First operand 73 states and 150 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:39,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:39,309 INFO L93 Difference]: Finished difference Result 219 states and 406 transitions. [2022-03-15 16:32:39,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:32:39,309 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:32:39,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:39,310 INFO L225 Difference]: With dead ends: 219 [2022-03-15 16:32:39,310 INFO L226 Difference]: Without dead ends: 205 [2022-03-15 16:32:39,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:32:39,311 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 176 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:39,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 79 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:32:39,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-15 16:32:39,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 102. [2022-03-15 16:32:39,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1386138613861387) internal successors, (216), 101 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:39,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 216 transitions. [2022-03-15 16:32:39,314 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 216 transitions. Word has length 20 [2022-03-15 16:32:39,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:39,315 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 216 transitions. [2022-03-15 16:32:39,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:39,315 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 216 transitions. [2022-03-15 16:32:39,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:32:39,315 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:39,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:39,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 16:32:39,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:39,531 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:39,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:39,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1979372002, now seen corresponding path program 6 times [2022-03-15 16:32:39,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:39,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335799063] [2022-03-15 16:32:39,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:39,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:39,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:39,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335799063] [2022-03-15 16:32:39,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335799063] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:39,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590758226] [2022-03-15 16:32:39,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:32:39,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:39,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:39,577 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) [2022-03-15 16:32:39,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 16:32:39,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:32:39,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:32:39,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:32:39,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:39,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:39,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:39,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590758226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:39,766 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:39,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-03-15 16:32:39,766 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271764402] [2022-03-15 16:32:39,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:39,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:32:39,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:39,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:32:39,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:32:39,767 INFO L87 Difference]: Start difference. First operand 102 states and 216 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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) [2022-03-15 16:32:40,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:40,075 INFO L93 Difference]: Finished difference Result 245 states and 455 transitions. [2022-03-15 16:32:40,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:32:40,075 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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 20 [2022-03-15 16:32:40,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:40,076 INFO L225 Difference]: With dead ends: 245 [2022-03-15 16:32:40,076 INFO L226 Difference]: Without dead ends: 245 [2022-03-15 16:32:40,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:32:40,077 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 213 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:40,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 102 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:32:40,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-15 16:32:40,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 118. [2022-03-15 16:32:40,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.2051282051282053) internal successors, (258), 117 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:40,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 258 transitions. [2022-03-15 16:32:40,081 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 258 transitions. Word has length 20 [2022-03-15 16:32:40,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:40,081 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 258 transitions. [2022-03-15 16:32:40,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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) [2022-03-15 16:32:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 258 transitions. [2022-03-15 16:32:40,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:32:40,082 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:40,082 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:40,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 16:32:40,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:40,282 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:40,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:40,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1647693214, now seen corresponding path program 7 times [2022-03-15 16:32:40,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:40,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903690940] [2022-03-15 16:32:40,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:40,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:40,331 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:40,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903690940] [2022-03-15 16:32:40,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903690940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:40,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44726224] [2022-03-15 16:32:40,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:32:40,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:40,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:40,332 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) [2022-03-15 16:32:40,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 16:32:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:40,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:32:40,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:40,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:40,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:40,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:40,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44726224] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:40,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:40,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-03-15 16:32:40,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957751804] [2022-03-15 16:32:40,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:40,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:32:40,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:40,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:32:40,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:32:40,544 INFO L87 Difference]: Start difference. First operand 118 states and 258 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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) [2022-03-15 16:32:40,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:40,777 INFO L93 Difference]: Finished difference Result 205 states and 416 transitions. [2022-03-15 16:32:40,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:32:40,778 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 20 [2022-03-15 16:32:40,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:40,778 INFO L225 Difference]: With dead ends: 205 [2022-03-15 16:32:40,778 INFO L226 Difference]: Without dead ends: 203 [2022-03-15 16:32:40,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:32:40,779 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 127 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:40,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 54 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:32:40,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-15 16:32:40,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 120. [2022-03-15 16:32:40,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1848739495798317) internal successors, (260), 119 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:40,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 260 transitions. [2022-03-15 16:32:40,783 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 260 transitions. Word has length 20 [2022-03-15 16:32:40,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:40,783 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 260 transitions. [2022-03-15 16:32:40,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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) [2022-03-15 16:32:40,783 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 260 transitions. [2022-03-15 16:32:40,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:32:40,783 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:40,784 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:40,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 16:32:40,999 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,SelfDestructingSolverStorable11 [2022-03-15 16:32:40,999 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:40,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:41,000 INFO L85 PathProgramCache]: Analyzing trace with hash -240395856, now seen corresponding path program 8 times [2022-03-15 16:32:41,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:41,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643696749] [2022-03-15 16:32:41,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:41,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:32:41,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:41,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643696749] [2022-03-15 16:32:41,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643696749] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:41,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608682383] [2022-03-15 16:32:41,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:32:41,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:41,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:41,047 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) [2022-03-15 16:32:41,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 16:32:41,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:32:41,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:32:41,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:32:41,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:41,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:41,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:41,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608682383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:41,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:41,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-03-15 16:32:41,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865894612] [2022-03-15 16:32:41,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:41,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:32:41,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:41,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:32:41,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:32:41,257 INFO L87 Difference]: Start difference. First operand 120 states and 260 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:41,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:41,646 INFO L93 Difference]: Finished difference Result 351 states and 688 transitions. [2022-03-15 16:32:41,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:32:41,647 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:32:41,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:41,648 INFO L225 Difference]: With dead ends: 351 [2022-03-15 16:32:41,648 INFO L226 Difference]: Without dead ends: 351 [2022-03-15 16:32:41,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=434, Invalid=972, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:32:41,649 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 186 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:41,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 131 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:32:41,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-03-15 16:32:41,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 165. [2022-03-15 16:32:41,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.292682926829268) internal successors, (376), 164 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:41,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 376 transitions. [2022-03-15 16:32:41,654 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 376 transitions. Word has length 20 [2022-03-15 16:32:41,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:41,655 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 376 transitions. [2022-03-15 16:32:41,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:41,655 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 376 transitions. [2022-03-15 16:32:41,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:32:41,655 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:41,655 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:41,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 16:32:41,871 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,SelfDestructingSolverStorable12 [2022-03-15 16:32:41,871 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:41,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:41,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1351610928, now seen corresponding path program 9 times [2022-03-15 16:32:41,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:41,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750625887] [2022-03-15 16:32:41,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:41,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:32:41,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:41,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750625887] [2022-03-15 16:32:41,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750625887] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:41,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160066362] [2022-03-15 16:32:41,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:32:41,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:41,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:41,920 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) [2022-03-15 16:32:41,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 16:32:41,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:32:41,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:32:41,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:32:41,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:42,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:42,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160066362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:42,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:42,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-03-15 16:32:42,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356873368] [2022-03-15 16:32:42,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:42,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:32:42,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:42,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:32:42,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:32:42,115 INFO L87 Difference]: Start difference. First operand 165 states and 376 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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) [2022-03-15 16:32:42,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:42,307 INFO L93 Difference]: Finished difference Result 238 states and 512 transitions. [2022-03-15 16:32:42,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:32:42,307 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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 20 [2022-03-15 16:32:42,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:42,308 INFO L225 Difference]: With dead ends: 238 [2022-03-15 16:32:42,308 INFO L226 Difference]: Without dead ends: 235 [2022-03-15 16:32:42,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:32:42,309 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 115 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:42,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 60 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:32:42,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-03-15 16:32:42,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 183. [2022-03-15 16:32:42,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.340659340659341) internal successors, (426), 182 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:42,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 426 transitions. [2022-03-15 16:32:42,313 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 426 transitions. Word has length 20 [2022-03-15 16:32:42,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:42,313 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 426 transitions. [2022-03-15 16:32:42,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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) [2022-03-15 16:32:42,313 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 426 transitions. [2022-03-15 16:32:42,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:32:42,314 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:42,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:42,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 16:32:42,514 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,SelfDestructingSolverStorable13 [2022-03-15 16:32:42,514 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:42,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:42,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1992477080, now seen corresponding path program 10 times [2022-03-15 16:32:42,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:42,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132544240] [2022-03-15 16:32:42,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:42,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:32:42,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:42,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132544240] [2022-03-15 16:32:42,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132544240] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:42,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698091706] [2022-03-15 16:32:42,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:32:42,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:42,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:42,560 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) [2022-03-15 16:32:42,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 16:32:42,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:32:42,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:32:42,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:32:42,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:42,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:42,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698091706] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:42,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:42,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-03-15 16:32:42,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321421293] [2022-03-15 16:32:42,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:42,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:32:42,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:42,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:32:42,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:32:42,744 INFO L87 Difference]: Start difference. First operand 183 states and 426 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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) [2022-03-15 16:32:43,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:43,049 INFO L93 Difference]: Finished difference Result 302 states and 633 transitions. [2022-03-15 16:32:43,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:32:43,050 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 20 [2022-03-15 16:32:43,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:43,051 INFO L225 Difference]: With dead ends: 302 [2022-03-15 16:32:43,051 INFO L226 Difference]: Without dead ends: 300 [2022-03-15 16:32:43,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=309, Invalid=683, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:32:43,052 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 151 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:43,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 65 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:32:43,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-03-15 16:32:43,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 183. [2022-03-15 16:32:43,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.3351648351648353) internal successors, (425), 182 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:43,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 425 transitions. [2022-03-15 16:32:43,056 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 425 transitions. Word has length 20 [2022-03-15 16:32:43,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:43,056 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 425 transitions. [2022-03-15 16:32:43,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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) [2022-03-15 16:32:43,056 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 425 transitions. [2022-03-15 16:32:43,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:32:43,057 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:43,057 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:43,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 16:32:43,257 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,SelfDestructingSolverStorable14 [2022-03-15 16:32:43,257 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:43,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:43,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1796143950, now seen corresponding path program 11 times [2022-03-15 16:32:43,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:43,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560399397] [2022-03-15 16:32:43,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:43,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:43,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:43,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560399397] [2022-03-15 16:32:43,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560399397] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:43,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453148801] [2022-03-15 16:32:43,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:32:43,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:43,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:43,301 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) [2022-03-15 16:32:43,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 16:32:43,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:32:43,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:32:43,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:32:43,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:43,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:43,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453148801] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:43,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:43,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 16:32:43,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484731893] [2022-03-15 16:32:43,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:43,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:32:43,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:43,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:32:43,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:32:43,484 INFO L87 Difference]: Start difference. First operand 183 states and 425 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:43,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:43,718 INFO L93 Difference]: Finished difference Result 302 states and 642 transitions. [2022-03-15 16:32:43,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:32:43,718 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:32:43,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:43,720 INFO L225 Difference]: With dead ends: 302 [2022-03-15 16:32:43,720 INFO L226 Difference]: Without dead ends: 296 [2022-03-15 16:32:43,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:32:43,720 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 152 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:43,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 53 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:32:43,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-03-15 16:32:43,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 198. [2022-03-15 16:32:43,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.33502538071066) internal successors, (460), 197 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:43,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 460 transitions. [2022-03-15 16:32:43,725 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 460 transitions. Word has length 20 [2022-03-15 16:32:43,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:43,725 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 460 transitions. [2022-03-15 16:32:43,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:43,725 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 460 transitions. [2022-03-15 16:32:43,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:32:43,726 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:43,726 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:43,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 16:32:43,942 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,SelfDestructingSolverStorable15 [2022-03-15 16:32:43,942 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:43,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:43,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1370143840, now seen corresponding path program 12 times [2022-03-15 16:32:43,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:43,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109871682] [2022-03-15 16:32:43,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:43,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:44,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:44,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109871682] [2022-03-15 16:32:44,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109871682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:44,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815535754] [2022-03-15 16:32:44,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:32:44,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:44,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:44,030 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) [2022-03-15 16:32:44,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 16:32:44,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:32:44,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:32:44,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:32:44,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:44,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:32:44,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:32:44,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:44,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:44,280 INFO L387 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 37 treesize of output 7 [2022-03-15 16:32:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:44,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:44,400 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:32:44,401 INFO L387 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 20 treesize of output 45 [2022-03-15 16:32:44,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:44,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:44,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:32:44,461 INFO L387 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 20 treesize of output 3 [2022-03-15 16:32:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:44,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815535754] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:44,498 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:44,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:32:44,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544426721] [2022-03-15 16:32:44,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:44,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:32:44,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:44,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:32:44,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:32:44,500 INFO L87 Difference]: Start difference. First operand 198 states and 460 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:44,577 INFO L93 Difference]: Finished difference Result 270 states and 611 transitions. [2022-03-15 16:32:44,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 16:32:44,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:32:44,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:44,578 INFO L225 Difference]: With dead ends: 270 [2022-03-15 16:32:44,578 INFO L226 Difference]: Without dead ends: 254 [2022-03-15 16:32:44,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:32:44,580 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 48 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:44,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 121 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-03-15 16:32:44,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-15 16:32:44,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 221. [2022-03-15 16:32:44,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.3363636363636364) internal successors, (514), 220 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:44,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 514 transitions. [2022-03-15 16:32:44,584 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 514 transitions. Word has length 22 [2022-03-15 16:32:44,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:44,584 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 514 transitions. [2022-03-15 16:32:44,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:44,585 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 514 transitions. [2022-03-15 16:32:44,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:32:44,585 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:44,585 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:44,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 16:32:44,802 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,SelfDestructingSolverStorable16 [2022-03-15 16:32:44,802 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:44,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:44,803 INFO L85 PathProgramCache]: Analyzing trace with hash -313455896, now seen corresponding path program 13 times [2022-03-15 16:32:44,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:44,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836682174] [2022-03-15 16:32:44,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:44,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:44,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:44,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836682174] [2022-03-15 16:32:44,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836682174] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:44,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992162268] [2022-03-15 16:32:44,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:32:44,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:44,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:44,893 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) [2022-03-15 16:32:44,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 16:32:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:44,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:32:44,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:45,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:32:45,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:32:45,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:45,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:45,116 INFO L387 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 37 treesize of output 7 [2022-03-15 16:32:45,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:45,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:45,234 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:32:45,234 INFO L387 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 20 treesize of output 45 [2022-03-15 16:32:45,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:45,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:45,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:32:45,283 INFO L387 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 20 treesize of output 3 [2022-03-15 16:32:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:45,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992162268] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:45,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:45,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:32:45,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560394700] [2022-03-15 16:32:45,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:45,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:32:45,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:45,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:32:45,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:32:45,322 INFO L87 Difference]: Start difference. First operand 221 states and 514 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:45,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:45,386 INFO L93 Difference]: Finished difference Result 263 states and 589 transitions. [2022-03-15 16:32:45,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 16:32:45,386 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:32:45,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:45,387 INFO L225 Difference]: With dead ends: 263 [2022-03-15 16:32:45,387 INFO L226 Difference]: Without dead ends: 253 [2022-03-15 16:32:45,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:32:45,387 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 56 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:45,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 103 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 119 Invalid, 0 Unknown, 86 Unchecked, 0.1s Time] [2022-03-15 16:32:45,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-15 16:32:45,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 212. [2022-03-15 16:32:45,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.3554502369668247) internal successors, (497), 211 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:45,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 497 transitions. [2022-03-15 16:32:45,392 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 497 transitions. Word has length 22 [2022-03-15 16:32:45,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:45,392 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 497 transitions. [2022-03-15 16:32:45,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:45,392 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 497 transitions. [2022-03-15 16:32:45,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:32:45,392 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:45,392 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:45,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 16:32:45,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:45,593 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:45,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:45,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1887689564, now seen corresponding path program 14 times [2022-03-15 16:32:45,593 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:45,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675028400] [2022-03-15 16:32:45,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:45,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:45,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:45,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:45,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675028400] [2022-03-15 16:32:45,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675028400] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:45,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877957891] [2022-03-15 16:32:45,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:32:45,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:45,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:45,689 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) [2022-03-15 16:32:45,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 16:32:45,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:32:45,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:32:45,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:32:45,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:46,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:32:46,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:32:46,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:46,148 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:32:46,148 INFO L387 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 27 [2022-03-15 16:32:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:46,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:46,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:46,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:32:46,543 INFO L387 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 34 treesize of output 59 [2022-03-15 16:32:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:46,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877957891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:46,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:46,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-03-15 16:32:46,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982920494] [2022-03-15 16:32:46,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:46,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:32:46,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:46,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:32:46,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:32:46,968 INFO L87 Difference]: Start difference. First operand 212 states and 497 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2022-03-15 16:32:47,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:47,592 INFO L93 Difference]: Finished difference Result 355 states and 801 transitions. [2022-03-15 16:32:47,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:32:47,593 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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 22 [2022-03-15 16:32:47,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:47,594 INFO L225 Difference]: With dead ends: 355 [2022-03-15 16:32:47,594 INFO L226 Difference]: Without dead ends: 352 [2022-03-15 16:32:47,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=282, Invalid=1440, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:32:47,595 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 80 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:47,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 171 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 230 Invalid, 0 Unknown, 221 Unchecked, 0.1s Time] [2022-03-15 16:32:47,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-03-15 16:32:47,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 228. [2022-03-15 16:32:47,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.33920704845815) internal successors, (531), 227 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:47,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 531 transitions. [2022-03-15 16:32:47,602 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 531 transitions. Word has length 22 [2022-03-15 16:32:47,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:47,602 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 531 transitions. [2022-03-15 16:32:47,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2022-03-15 16:32:47,602 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 531 transitions. [2022-03-15 16:32:47,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:32:47,603 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:47,603 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:47,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 16:32:47,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:47,814 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:47,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:47,815 INFO L85 PathProgramCache]: Analyzing trace with hash 816408682, now seen corresponding path program 15 times [2022-03-15 16:32:47,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:47,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747312146] [2022-03-15 16:32:47,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:47,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:47,911 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:47,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747312146] [2022-03-15 16:32:47,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747312146] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:47,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063933773] [2022-03-15 16:32:47,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:32:47,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:47,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:47,912 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) [2022-03-15 16:32:47,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 16:32:47,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:32:47,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:32:47,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:32:47,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:48,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:48,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:32:48,210 INFO L387 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 35 [2022-03-15 16:32:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:48,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:48,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:32:48,785 INFO L387 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 34 treesize of output 67 [2022-03-15 16:32:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:49,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063933773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:49,469 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:49,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 25 [2022-03-15 16:32:49,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049651657] [2022-03-15 16:32:49,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:49,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:32:49,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:49,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:32:49,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:32:49,470 INFO L87 Difference]: Start difference. First operand 228 states and 531 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:50,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:50,400 INFO L93 Difference]: Finished difference Result 431 states and 961 transitions. [2022-03-15 16:32:50,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:32:50,401 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:32:50,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:50,402 INFO L225 Difference]: With dead ends: 431 [2022-03-15 16:32:50,402 INFO L226 Difference]: Without dead ends: 413 [2022-03-15 16:32:50,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=399, Invalid=2253, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:32:50,403 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 108 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:50,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 162 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 329 Invalid, 0 Unknown, 412 Unchecked, 0.2s Time] [2022-03-15 16:32:50,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-03-15 16:32:50,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 259. [2022-03-15 16:32:50,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.317829457364341) internal successors, (598), 258 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 598 transitions. [2022-03-15 16:32:50,409 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 598 transitions. Word has length 22 [2022-03-15 16:32:50,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:50,409 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 598 transitions. [2022-03-15 16:32:50,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:50,409 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 598 transitions. [2022-03-15 16:32:50,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:32:50,410 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:50,410 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:50,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 16:32:50,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:50,616 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:50,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:50,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1928000206, now seen corresponding path program 16 times [2022-03-15 16:32:50,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:50,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101613990] [2022-03-15 16:32:50,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:50,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:50,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:50,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:50,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101613990] [2022-03-15 16:32:50,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101613990] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:50,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759145217] [2022-03-15 16:32:50,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:32:50,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:50,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:50,701 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) [2022-03-15 16:32:50,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 16:32:50,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:32:50,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:32:50,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:32:50,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:50,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:32:50,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:50,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:50,901 INFO L387 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 37 treesize of output 7 [2022-03-15 16:32:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:50,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:51,031 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:32:51,032 INFO L387 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 20 treesize of output 45 [2022-03-15 16:32:51,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:51,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:51,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:32:51,081 INFO L387 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 20 treesize of output 3 [2022-03-15 16:32:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:51,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759145217] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:51,124 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:51,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-15 16:32:51,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948416853] [2022-03-15 16:32:51,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:51,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:32:51,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:51,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:32:51,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:32:51,124 INFO L87 Difference]: Start difference. First operand 259 states and 598 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:51,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:51,241 INFO L93 Difference]: Finished difference Result 334 states and 733 transitions. [2022-03-15 16:32:51,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:32:51,241 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:32:51,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:51,242 INFO L225 Difference]: With dead ends: 334 [2022-03-15 16:32:51,242 INFO L226 Difference]: Without dead ends: 311 [2022-03-15 16:32:51,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:32:51,243 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 60 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:51,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 109 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 248 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-03-15 16:32:51,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-03-15 16:32:51,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 268. [2022-03-15 16:32:51,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.3183520599250937) internal successors, (619), 267 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:51,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 619 transitions. [2022-03-15 16:32:51,248 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 619 transitions. Word has length 22 [2022-03-15 16:32:51,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:51,248 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 619 transitions. [2022-03-15 16:32:51,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:51,249 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 619 transitions. [2022-03-15 16:32:51,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:32:51,249 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:51,249 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:51,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 16:32:51,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:51,450 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:51,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:51,450 INFO L85 PathProgramCache]: Analyzing trace with hash -871312262, now seen corresponding path program 17 times [2022-03-15 16:32:51,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:51,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190028108] [2022-03-15 16:32:51,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:51,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:51,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:51,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190028108] [2022-03-15 16:32:51,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190028108] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:51,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546629208] [2022-03-15 16:32:51,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:32:51,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:51,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:51,546 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) [2022-03-15 16:32:51,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 16:32:51,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:32:51,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:32:51,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:32:51,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:51,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:51,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:32:51,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:51,793 INFO L387 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 37 treesize of output 7 [2022-03-15 16:32:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:51,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:51,904 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:32:51,904 INFO L387 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 20 treesize of output 45 [2022-03-15 16:32:51,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:51,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:51,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:32:51,960 INFO L387 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 20 treesize of output 3 [2022-03-15 16:32:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:52,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546629208] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:52,003 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:52,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-15 16:32:52,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947937752] [2022-03-15 16:32:52,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:52,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:32:52,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:52,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:32:52,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:32:52,004 INFO L87 Difference]: Start difference. First operand 268 states and 619 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:52,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:52,098 INFO L93 Difference]: Finished difference Result 329 states and 720 transitions. [2022-03-15 16:32:52,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:32:52,098 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:32:52,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:52,100 INFO L225 Difference]: With dead ends: 329 [2022-03-15 16:32:52,100 INFO L226 Difference]: Without dead ends: 326 [2022-03-15 16:32:52,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:32:52,100 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 62 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:52,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 119 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 210 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-03-15 16:32:52,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-03-15 16:32:52,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 264. [2022-03-15 16:32:52,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.32319391634981) internal successors, (611), 263 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:52,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 611 transitions. [2022-03-15 16:32:52,105 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 611 transitions. Word has length 22 [2022-03-15 16:32:52,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:52,106 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 611 transitions. [2022-03-15 16:32:52,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:52,106 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 611 transitions. [2022-03-15 16:32:52,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:32:52,106 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:52,106 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:52,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 16:32:52,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:52,323 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:52,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:52,324 INFO L85 PathProgramCache]: Analyzing trace with hash 962650606, now seen corresponding path program 18 times [2022-03-15 16:32:52,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:52,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168033154] [2022-03-15 16:32:52,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:52,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:52,414 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:52,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168033154] [2022-03-15 16:32:52,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168033154] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:52,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473167892] [2022-03-15 16:32:52,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:32:52,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:52,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:52,415 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) [2022-03-15 16:32:52,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 16:32:52,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:32:52,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:32:52,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:32:52,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:52,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:32:52,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:52,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:32:52,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:52,598 INFO L387 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 37 treesize of output 7 [2022-03-15 16:32:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:52,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:52,728 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:32:52,728 INFO L387 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 20 treesize of output 45 [2022-03-15 16:32:52,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:52,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:32:52,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:32:52,794 INFO L387 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 20 treesize of output 3 [2022-03-15 16:32:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:52,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473167892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:52,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:52,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:32:52,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604011318] [2022-03-15 16:32:52,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:52,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:32:52,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:52,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:32:52,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:32:52,838 INFO L87 Difference]: Start difference. First operand 264 states and 611 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2022-03-15 16:32:52,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:52,970 INFO L93 Difference]: Finished difference Result 357 states and 781 transitions. [2022-03-15 16:32:52,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 16:32:52,970 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 22 [2022-03-15 16:32:52,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:52,979 INFO L225 Difference]: With dead ends: 357 [2022-03-15 16:32:52,979 INFO L226 Difference]: Without dead ends: 350 [2022-03-15 16:32:52,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:32:52,979 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 66 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:52,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 150 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:32:52,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-03-15 16:32:52,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 283. [2022-03-15 16:32:52,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.3297872340425534) internal successors, (657), 282 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:52,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 657 transitions. [2022-03-15 16:32:52,985 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 657 transitions. Word has length 22 [2022-03-15 16:32:52,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:52,985 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 657 transitions. [2022-03-15 16:32:52,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2022-03-15 16:32:52,986 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 657 transitions. [2022-03-15 16:32:52,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:32:52,986 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:52,986 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:53,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 16:32:53,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:53,202 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:53,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:53,202 INFO L85 PathProgramCache]: Analyzing trace with hash 419045022, now seen corresponding path program 19 times [2022-03-15 16:32:53,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:53,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270417722] [2022-03-15 16:32:53,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:53,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:53,264 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:53,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270417722] [2022-03-15 16:32:53,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270417722] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:53,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125822504] [2022-03-15 16:32:53,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:32:53,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:53,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:53,265 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) [2022-03-15 16:32:53,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 16:32:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:53,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 16:32:53,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:53,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:53,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125822504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:53,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:53,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-03-15 16:32:53,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616964635] [2022-03-15 16:32:53,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:53,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:32:53,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:53,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:32:53,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:32:53,487 INFO L87 Difference]: Start difference. First operand 283 states and 657 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:54,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:54,029 INFO L93 Difference]: Finished difference Result 565 states and 1194 transitions. [2022-03-15 16:32:54,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 16:32:54,029 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:32:54,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:54,031 INFO L225 Difference]: With dead ends: 565 [2022-03-15 16:32:54,031 INFO L226 Difference]: Without dead ends: 565 [2022-03-15 16:32:54,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=652, Invalid=1798, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:32:54,032 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 186 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:54,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 135 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:32:54,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-03-15 16:32:54,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 261. [2022-03-15 16:32:54,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.330769230769231) internal successors, (606), 260 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:54,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 606 transitions. [2022-03-15 16:32:54,038 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 606 transitions. Word has length 24 [2022-03-15 16:32:54,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:54,038 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 606 transitions. [2022-03-15 16:32:54,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:54,038 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 606 transitions. [2022-03-15 16:32:54,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:32:54,039 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:54,039 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:54,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-15 16:32:54,255 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,SelfDestructingSolverStorable23 [2022-03-15 16:32:54,255 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:54,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:54,256 INFO L85 PathProgramCache]: Analyzing trace with hash -989086942, now seen corresponding path program 20 times [2022-03-15 16:32:54,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:54,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920315179] [2022-03-15 16:32:54,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:54,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:54,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:54,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920315179] [2022-03-15 16:32:54,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920315179] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:54,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719212824] [2022-03-15 16:32:54,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:32:54,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:54,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:54,316 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) [2022-03-15 16:32:54,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 16:32:54,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:32:54,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:32:54,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 16:32:54,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:54,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:54,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719212824] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:54,553 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:54,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 16:32:54,553 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759334439] [2022-03-15 16:32:54,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:54,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:32:54,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:54,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:32:54,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:32:54,554 INFO L87 Difference]: Start difference. First operand 261 states and 606 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:55,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:55,040 INFO L93 Difference]: Finished difference Result 727 states and 1493 transitions. [2022-03-15 16:32:55,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:32:55,040 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:32:55,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:55,042 INFO L225 Difference]: With dead ends: 727 [2022-03-15 16:32:55,042 INFO L226 Difference]: Without dead ends: 683 [2022-03-15 16:32:55,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=562, Invalid=1508, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:32:55,043 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 270 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:55,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 134 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:32:55,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-03-15 16:32:55,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 317. [2022-03-15 16:32:55,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.3512658227848102) internal successors, (743), 316 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:55,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 743 transitions. [2022-03-15 16:32:55,050 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 743 transitions. Word has length 24 [2022-03-15 16:32:55,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:55,051 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 743 transitions. [2022-03-15 16:32:55,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:55,051 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 743 transitions. [2022-03-15 16:32:55,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:32:55,051 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:55,051 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:55,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-15 16:32:55,267 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,SelfDestructingSolverStorable24 [2022-03-15 16:32:55,267 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:55,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:55,268 INFO L85 PathProgramCache]: Analyzing trace with hash 867513058, now seen corresponding path program 21 times [2022-03-15 16:32:55,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:55,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211513133] [2022-03-15 16:32:55,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:55,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:55,323 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:55,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211513133] [2022-03-15 16:32:55,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211513133] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:55,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206994213] [2022-03-15 16:32:55,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:32:55,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:55,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:55,325 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) [2022-03-15 16:32:55,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 16:32:55,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:32:55,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:32:55,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 16:32:55,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:55,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:55,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:55,610 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:55,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206994213] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:55,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:55,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2022-03-15 16:32:55,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064180056] [2022-03-15 16:32:55,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:55,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:32:55,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:55,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:32:55,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:32:55,611 INFO L87 Difference]: Start difference. First operand 317 states and 743 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:56,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:56,227 INFO L93 Difference]: Finished difference Result 759 states and 1599 transitions. [2022-03-15 16:32:56,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:32:56,227 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:32:56,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:56,230 INFO L225 Difference]: With dead ends: 759 [2022-03-15 16:32:56,230 INFO L226 Difference]: Without dead ends: 757 [2022-03-15 16:32:56,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=856, Invalid=2114, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:32:56,231 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 302 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:56,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 159 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:32:56,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-03-15 16:32:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 385. [2022-03-15 16:32:56,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.3984375) internal successors, (921), 384 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:56,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 921 transitions. [2022-03-15 16:32:56,245 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 921 transitions. Word has length 24 [2022-03-15 16:32:56,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:56,245 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 921 transitions. [2022-03-15 16:32:56,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:56,245 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 921 transitions. [2022-03-15 16:32:56,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:32:56,246 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:56,246 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:56,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 16:32:56,461 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,SelfDestructingSolverStorable25 [2022-03-15 16:32:56,462 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:56,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:56,462 INFO L85 PathProgramCache]: Analyzing trace with hash 535834270, now seen corresponding path program 22 times [2022-03-15 16:32:56,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:56,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744880175] [2022-03-15 16:32:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:56,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:56,517 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:56,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:56,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744880175] [2022-03-15 16:32:56,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744880175] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:56,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183796368] [2022-03-15 16:32:56,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:32:56,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:56,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:56,518 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) [2022-03-15 16:32:56,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 16:32:56,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:32:56,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:32:56,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 16:32:56,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:56,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:56,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183796368] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:56,766 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:56,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-03-15 16:32:56,766 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616510943] [2022-03-15 16:32:56,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:56,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:32:56,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:56,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:32:56,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:32:56,767 INFO L87 Difference]: Start difference. First operand 385 states and 921 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:57,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:57,157 INFO L93 Difference]: Finished difference Result 562 states and 1252 transitions. [2022-03-15 16:32:57,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:32:57,157 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:32:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:57,159 INFO L225 Difference]: With dead ends: 562 [2022-03-15 16:32:57,159 INFO L226 Difference]: Without dead ends: 558 [2022-03-15 16:32:57,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:32:57,160 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 126 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:57,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 77 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:32:57,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-03-15 16:32:57,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 385. [2022-03-15 16:32:57,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.3958333333333335) internal successors, (920), 384 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:57,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 920 transitions. [2022-03-15 16:32:57,166 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 920 transitions. Word has length 24 [2022-03-15 16:32:57,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:57,166 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 920 transitions. [2022-03-15 16:32:57,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:57,166 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 920 transitions. [2022-03-15 16:32:57,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:32:57,167 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:57,167 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:57,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-15 16:32:57,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:57,375 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:57,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:57,376 INFO L85 PathProgramCache]: Analyzing trace with hash 48878956, now seen corresponding path program 23 times [2022-03-15 16:32:57,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:57,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084867349] [2022-03-15 16:32:57,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:57,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:32:57,418 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:57,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084867349] [2022-03-15 16:32:57,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084867349] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:57,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400777774] [2022-03-15 16:32:57,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:32:57,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:57,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:57,419 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) [2022-03-15 16:32:57,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:32:57,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:32:57,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 16:32:57,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:57,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 16:32:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:57,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:57,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400777774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:57,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:57,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-03-15 16:32:57,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490397230] [2022-03-15 16:32:57,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:57,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:32:57,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:57,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:32:57,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:32:57,690 INFO L87 Difference]: Start difference. First operand 385 states and 920 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) [2022-03-15 16:32:58,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:58,079 INFO L93 Difference]: Finished difference Result 616 states and 1364 transitions. [2022-03-15 16:32:58,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:32:58,080 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 24 [2022-03-15 16:32:58,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:58,082 INFO L225 Difference]: With dead ends: 616 [2022-03-15 16:32:58,082 INFO L226 Difference]: Without dead ends: 607 [2022-03-15 16:32:58,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=1115, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:32:58,082 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 156 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:58,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 102 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:32:58,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-03-15 16:32:58,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 406. [2022-03-15 16:32:58,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.417283950617284) internal successors, (979), 405 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:58,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 979 transitions. [2022-03-15 16:32:58,099 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 979 transitions. Word has length 24 [2022-03-15 16:32:58,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:58,099 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 979 transitions. [2022-03-15 16:32:58,099 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) [2022-03-15 16:32:58,099 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 979 transitions. [2022-03-15 16:32:58,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:32:58,100 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:58,100 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:58,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-15 16:32:58,307 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,SelfDestructingSolverStorable27 [2022-03-15 16:32:58,307 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:58,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:58,308 INFO L85 PathProgramCache]: Analyzing trace with hash 493411978, now seen corresponding path program 24 times [2022-03-15 16:32:58,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:58,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543393146] [2022-03-15 16:32:58,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:58,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:58,383 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:58,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543393146] [2022-03-15 16:32:58,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543393146] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:58,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858201132] [2022-03-15 16:32:58,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:32:58,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:58,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:58,385 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) [2022-03-15 16:32:58,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 16:32:58,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:32:58,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:32:58,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 16:32:58,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:58,550 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:58,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:58,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858201132] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:58,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:58,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-15 16:32:58,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339099854] [2022-03-15 16:32:58,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:58,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:32:58,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:58,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:32:58,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:32:58,635 INFO L87 Difference]: Start difference. First operand 406 states and 979 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:59,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:32:59,043 INFO L93 Difference]: Finished difference Result 736 states and 1626 transitions. [2022-03-15 16:32:59,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:32:59,043 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:32:59,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:32:59,045 INFO L225 Difference]: With dead ends: 736 [2022-03-15 16:32:59,045 INFO L226 Difference]: Without dead ends: 722 [2022-03-15 16:32:59,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=544, Invalid=1348, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:32:59,046 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 187 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:32:59,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 97 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:32:59,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-03-15 16:32:59,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 409. [2022-03-15 16:32:59,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.411764705882353) internal successors, (984), 408 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:59,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 984 transitions. [2022-03-15 16:32:59,054 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 984 transitions. Word has length 24 [2022-03-15 16:32:59,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:32:59,054 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 984 transitions. [2022-03-15 16:32:59,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:32:59,055 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 984 transitions. [2022-03-15 16:32:59,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:32:59,055 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:32:59,055 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:32:59,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-15 16:32:59,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-15 16:32:59,271 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:32:59,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:32:59,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1128304716, now seen corresponding path program 25 times [2022-03-15 16:32:59,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:32:59,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409877015] [2022-03-15 16:32:59,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:32:59,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:32:59,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:32:59,328 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:32:59,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409877015] [2022-03-15 16:32:59,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409877015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:32:59,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822757645] [2022-03-15 16:32:59,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:32:59,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:32:59,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:32:59,329 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) [2022-03-15 16:32:59,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 16:32:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:32:59,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 16:32:59,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:59,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:32:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:32:59,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822757645] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:32:59,618 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:32:59,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 16:32:59,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101165520] [2022-03-15 16:32:59,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:32:59,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:32:59,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:32:59,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:32:59,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:32:59,619 INFO L87 Difference]: Start difference. First operand 409 states and 984 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 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) [2022-03-15 16:33:00,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:33:00,213 INFO L93 Difference]: Finished difference Result 923 states and 1981 transitions. [2022-03-15 16:33:00,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:33:00,214 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 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 24 [2022-03-15 16:33:00,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:33:00,216 INFO L225 Difference]: With dead ends: 923 [2022-03-15 16:33:00,216 INFO L226 Difference]: Without dead ends: 923 [2022-03-15 16:33:00,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=815, Invalid=2047, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:33:00,218 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 273 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:33:00,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 192 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:33:00,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-03-15 16:33:00,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 431. [2022-03-15 16:33:00,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.386046511627907) internal successors, (1026), 430 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:00,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1026 transitions. [2022-03-15 16:33:00,238 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1026 transitions. Word has length 24 [2022-03-15 16:33:00,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:33:00,238 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1026 transitions. [2022-03-15 16:33:00,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 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) [2022-03-15 16:33:00,238 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1026 transitions. [2022-03-15 16:33:00,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:33:00,238 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:33:00,239 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:33:00,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-15 16:33:00,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:00,446 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:33:00,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:33:00,447 INFO L85 PathProgramCache]: Analyzing trace with hash -218142668, now seen corresponding path program 26 times [2022-03-15 16:33:00,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:33:00,447 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790461564] [2022-03-15 16:33:00,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:33:00,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:33:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:33:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:33:00,493 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:33:00,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790461564] [2022-03-15 16:33:00,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790461564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:33:00,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306889100] [2022-03-15 16:33:00,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:33:00,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:00,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:33:00,494 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) [2022-03-15 16:33:00,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 16:33:00,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:33:00,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:33:00,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 16:33:00,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:33:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:00,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:33:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:00,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306889100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:33:00,744 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:33:00,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-15 16:33:00,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416183844] [2022-03-15 16:33:00,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:33:00,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:33:00,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:33:00,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:33:00,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:33:00,745 INFO L87 Difference]: Start difference. First operand 431 states and 1026 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:01,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:33:01,105 INFO L93 Difference]: Finished difference Result 601 states and 1312 transitions. [2022-03-15 16:33:01,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:33:01,105 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:33:01,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:33:01,107 INFO L225 Difference]: With dead ends: 601 [2022-03-15 16:33:01,107 INFO L226 Difference]: Without dead ends: 583 [2022-03-15 16:33:01,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=1079, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:33:01,108 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 227 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:33:01,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 109 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:33:01,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-03-15 16:33:01,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 431. [2022-03-15 16:33:01,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.3767441860465115) internal successors, (1022), 430 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:01,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1022 transitions. [2022-03-15 16:33:01,114 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1022 transitions. Word has length 24 [2022-03-15 16:33:01,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:33:01,114 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1022 transitions. [2022-03-15 16:33:01,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:01,115 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1022 transitions. [2022-03-15 16:33:01,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:33:01,115 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:33:01,115 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:33:01,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-15 16:33:01,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:01,331 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:33:01,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:33:01,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1556407664, now seen corresponding path program 27 times [2022-03-15 16:33:01,331 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:33:01,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079126389] [2022-03-15 16:33:01,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:33:01,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:33:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:33:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:33:01,385 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:33:01,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079126389] [2022-03-15 16:33:01,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079126389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:33:01,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234637204] [2022-03-15 16:33:01,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:33:01,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:01,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:33:01,387 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) [2022-03-15 16:33:01,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 16:33:01,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:33:01,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:33:01,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 16:33:01,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:33:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:01,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:33:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:01,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234637204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:33:01,660 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:33:01,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-15 16:33:01,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405689932] [2022-03-15 16:33:01,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:33:01,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:33:01,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:33:01,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:33:01,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:33:01,666 INFO L87 Difference]: Start difference. First operand 431 states and 1022 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 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) [2022-03-15 16:33:02,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:33:02,405 INFO L93 Difference]: Finished difference Result 1092 states and 2410 transitions. [2022-03-15 16:33:02,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 16:33:02,405 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 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 24 [2022-03-15 16:33:02,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:33:02,408 INFO L225 Difference]: With dead ends: 1092 [2022-03-15 16:33:02,409 INFO L226 Difference]: Without dead ends: 1092 [2022-03-15 16:33:02,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1165, Invalid=2741, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 16:33:02,410 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 293 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:33:02,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 143 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:33:02,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2022-03-15 16:33:02,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 664. [2022-03-15 16:33:02,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 2.4630467571644044) internal successors, (1633), 663 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:02,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1633 transitions. [2022-03-15 16:33:02,425 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1633 transitions. Word has length 24 [2022-03-15 16:33:02,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:33:02,425 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1633 transitions. [2022-03-15 16:33:02,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 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) [2022-03-15 16:33:02,425 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1633 transitions. [2022-03-15 16:33:02,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:33:02,426 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:33:02,426 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:33:02,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-15 16:33:02,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:02,635 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:33:02,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:33:02,636 INFO L85 PathProgramCache]: Analyzing trace with hash -195673560, now seen corresponding path program 28 times [2022-03-15 16:33:02,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:33:02,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976079762] [2022-03-15 16:33:02,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:33:02,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:33:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:33:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:33:02,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:33:02,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976079762] [2022-03-15 16:33:02,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976079762] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:33:02,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659977101] [2022-03-15 16:33:02,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:33:02,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:02,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:33:02,703 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) [2022-03-15 16:33:02,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 16:33:02,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:33:02,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:33:02,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 16:33:02,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:33:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:02,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:33:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:02,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659977101] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:33:02,938 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:33:02,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-03-15 16:33:02,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534239535] [2022-03-15 16:33:02,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:33:02,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:33:02,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:33:02,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:33:02,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:33:02,939 INFO L87 Difference]: Start difference. First operand 664 states and 1633 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:03,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:33:03,457 INFO L93 Difference]: Finished difference Result 945 states and 2149 transitions. [2022-03-15 16:33:03,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:33:03,458 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:33:03,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:33:03,460 INFO L225 Difference]: With dead ends: 945 [2022-03-15 16:33:03,460 INFO L226 Difference]: Without dead ends: 941 [2022-03-15 16:33:03,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=724, Invalid=1726, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:33:03,461 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 230 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:33:03,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 76 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:33:03,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-03-15 16:33:03,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 664. [2022-03-15 16:33:03,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 2.4585218702865763) internal successors, (1630), 663 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:03,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1630 transitions. [2022-03-15 16:33:03,472 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1630 transitions. Word has length 24 [2022-03-15 16:33:03,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:33:03,472 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1630 transitions. [2022-03-15 16:33:03,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:03,473 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1630 transitions. [2022-03-15 16:33:03,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:33:03,474 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:33:03,474 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:33:03,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-15 16:33:03,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:03,679 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:33:03,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:33:03,680 INFO L85 PathProgramCache]: Analyzing trace with hash -702019826, now seen corresponding path program 29 times [2022-03-15 16:33:03,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:33:03,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258730444] [2022-03-15 16:33:03,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:33:03,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:33:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:33:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:33:03,741 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:33:03,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258730444] [2022-03-15 16:33:03,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258730444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:33:03,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93719393] [2022-03-15 16:33:03,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:33:03,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:03,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:33:03,742 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) [2022-03-15 16:33:03,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 16:33:03,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:33:03,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:33:03,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 16:33:03,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:33:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:03,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:33:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:03,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93719393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:33:03,984 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:33:03,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-15 16:33:03,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12548654] [2022-03-15 16:33:03,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:33:03,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:33:03,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:33:03,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:33:03,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:33:03,985 INFO L87 Difference]: Start difference. First operand 664 states and 1630 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:04,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:33:04,450 INFO L93 Difference]: Finished difference Result 1032 states and 2346 transitions. [2022-03-15 16:33:04,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:33:04,450 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:33:04,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:33:04,453 INFO L225 Difference]: With dead ends: 1032 [2022-03-15 16:33:04,453 INFO L226 Difference]: Without dead ends: 1020 [2022-03-15 16:33:04,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=657, Invalid=1599, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:33:04,454 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 282 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:33:04,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 75 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:33:04,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2022-03-15 16:33:04,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 715. [2022-03-15 16:33:04,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 2.4747899159663866) internal successors, (1767), 714 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:04,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1767 transitions. [2022-03-15 16:33:04,466 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1767 transitions. Word has length 24 [2022-03-15 16:33:04,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:33:04,467 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 1767 transitions. [2022-03-15 16:33:04,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:04,467 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1767 transitions. [2022-03-15 16:33:04,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:33:04,468 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:33:04,468 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:33:04,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-15 16:33:04,671 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,SelfDestructingSolverStorable33 [2022-03-15 16:33:04,671 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:33:04,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:33:04,672 INFO L85 PathProgramCache]: Analyzing trace with hash -929241206, now seen corresponding path program 30 times [2022-03-15 16:33:04,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:33:04,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716287415] [2022-03-15 16:33:04,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:33:04,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:33:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:33:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:04,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:33:04,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716287415] [2022-03-15 16:33:04,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716287415] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:33:04,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352455105] [2022-03-15 16:33:04,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:33:04,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:04,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:33:04,720 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) [2022-03-15 16:33:04,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 16:33:04,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:33:04,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:33:04,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 16:33:04,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:33:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:04,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:33:04,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:04,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352455105] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:33:04,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:33:04,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 16:33:04,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762417007] [2022-03-15 16:33:04,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:33:04,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:33:04,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:33:04,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:33:04,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:33:04,937 INFO L87 Difference]: Start difference. First operand 715 states and 1767 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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) [2022-03-15 16:33:05,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:33:05,334 INFO L93 Difference]: Finished difference Result 1063 states and 2453 transitions. [2022-03-15 16:33:05,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:33:05,334 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 24 [2022-03-15 16:33:05,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:33:05,345 INFO L225 Difference]: With dead ends: 1063 [2022-03-15 16:33:05,346 INFO L226 Difference]: Without dead ends: 1043 [2022-03-15 16:33:05,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=557, Invalid=1423, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:33:05,347 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 258 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:33:05,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 73 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:33:05,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2022-03-15 16:33:05,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 771. [2022-03-15 16:33:05,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 2.4883116883116885) internal successors, (1916), 770 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:05,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1916 transitions. [2022-03-15 16:33:05,359 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1916 transitions. Word has length 24 [2022-03-15 16:33:05,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:33:05,359 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 1916 transitions. [2022-03-15 16:33:05,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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) [2022-03-15 16:33:05,359 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1916 transitions. [2022-03-15 16:33:05,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:33:05,360 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:33:05,361 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:33:05,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-15 16:33:05,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:05,567 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:33:05,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:33:05,568 INFO L85 PathProgramCache]: Analyzing trace with hash 434491040, now seen corresponding path program 31 times [2022-03-15 16:33:05,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:33:05,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511306180] [2022-03-15 16:33:05,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:33:05,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:33:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:33:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:05,795 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:33:05,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511306180] [2022-03-15 16:33:05,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511306180] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:33:05,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56189773] [2022-03-15 16:33:05,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:33:05,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:05,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:33:05,796 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) [2022-03-15 16:33:05,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 16:33:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:33:05,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:33:05,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:33:06,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:06,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:06,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:06,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:06,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:06,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:06,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:06,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:06,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-15 16:33:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:06,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:33:06,346 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:33:06,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-15 16:33:06,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:06,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:06,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:06,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:06,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:06,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:06,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:06,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:06,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-15 16:33:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:06,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56189773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:33:06,606 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:33:06,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-15 16:33:06,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386951880] [2022-03-15 16:33:06,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:33:06,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:33:06,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:33:06,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:33:06,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:33:06,607 INFO L87 Difference]: Start difference. First operand 771 states and 1916 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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) [2022-03-15 16:33:07,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:33:07,410 INFO L93 Difference]: Finished difference Result 1161 states and 2807 transitions. [2022-03-15 16:33:07,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 16:33:07,410 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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 26 [2022-03-15 16:33:07,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:33:07,414 INFO L225 Difference]: With dead ends: 1161 [2022-03-15 16:33:07,414 INFO L226 Difference]: Without dead ends: 1154 [2022-03-15 16:33:07,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=298, Invalid=2152, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:33:07,415 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 105 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:33:07,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 138 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 330 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2022-03-15 16:33:07,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2022-03-15 16:33:07,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 819. [2022-03-15 16:33:07,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 2.4731051344743276) internal successors, (2023), 818 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:07,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2023 transitions. [2022-03-15 16:33:07,427 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2023 transitions. Word has length 26 [2022-03-15 16:33:07,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:33:07,427 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 2023 transitions. [2022-03-15 16:33:07,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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) [2022-03-15 16:33:07,427 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2023 transitions. [2022-03-15 16:33:07,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:33:07,429 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:33:07,429 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:33:07,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 16:33:07,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:07,643 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:33:07,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:33:07,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1491178984, now seen corresponding path program 32 times [2022-03-15 16:33:07,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:33:07,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094726223] [2022-03-15 16:33:07,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:33:07,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:33:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:33:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:07,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:33:07,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094726223] [2022-03-15 16:33:07,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094726223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:33:07,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131993056] [2022-03-15 16:33:07,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:33:07,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:07,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:33:07,887 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) [2022-03-15 16:33:07,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 16:33:07,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:33:07,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:33:07,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:33:07,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:33:08,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:08,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:08,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:08,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:08,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:08,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:08,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-15 16:33:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:08,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:33:08,460 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:33:08,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-15 16:33:08,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:08,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:08,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:08,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:08,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:08,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:08,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:08,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:08,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-15 16:33:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:08,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131993056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:33:08,647 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:33:08,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-15 16:33:08,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922435186] [2022-03-15 16:33:08,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:33:08,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:33:08,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:33:08,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:33:08,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:33:08,648 INFO L87 Difference]: Start difference. First operand 819 states and 2023 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-15 16:33:09,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:33:09,456 INFO L93 Difference]: Finished difference Result 1175 states and 2816 transitions. [2022-03-15 16:33:09,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 16:33:09,456 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 26 [2022-03-15 16:33:09,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:33:09,459 INFO L225 Difference]: With dead ends: 1175 [2022-03-15 16:33:09,459 INFO L226 Difference]: Without dead ends: 1172 [2022-03-15 16:33:09,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=298, Invalid=2152, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:33:09,460 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 106 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:33:09,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 140 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 380 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2022-03-15 16:33:09,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2022-03-15 16:33:09,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 815. [2022-03-15 16:33:09,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 2.4754299754299756) internal successors, (2015), 814 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:09,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 2015 transitions. [2022-03-15 16:33:09,473 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2015 transitions. Word has length 26 [2022-03-15 16:33:09,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:33:09,473 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 2015 transitions. [2022-03-15 16:33:09,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-15 16:33:09,473 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 2015 transitions. [2022-03-15 16:33:09,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:33:09,474 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:33:09,475 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:33:09,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-15 16:33:09,690 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,SelfDestructingSolverStorable36 [2022-03-15 16:33:09,690 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:33:09,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:33:09,691 INFO L85 PathProgramCache]: Analyzing trace with hash -83054684, now seen corresponding path program 33 times [2022-03-15 16:33:09,691 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:33:09,691 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558806728] [2022-03-15 16:33:09,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:33:09,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:33:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:33:09,922 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:09,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:33:09,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558806728] [2022-03-15 16:33:09,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558806728] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:33:09,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607669928] [2022-03-15 16:33:09,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:33:09,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:09,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:33:09,923 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) [2022-03-15 16:33:09,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 16:33:09,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:33:09,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:33:09,944 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:33:09,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:33:10,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:10,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:10,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:10,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:33:10,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2022-03-15 16:33:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:10,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:33:11,621 INFO L353 Elim1Store]: treesize reduction 24, result has 83.0 percent of original size [2022-03-15 16:33:11,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 138 [2022-03-15 16:33:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:15,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607669928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:33:15,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:33:15,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 33 [2022-03-15 16:33:15,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176280960] [2022-03-15 16:33:15,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:33:15,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:33:15,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:33:15,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:33:15,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:33:15,632 INFO L87 Difference]: Start difference. First operand 815 states and 2015 transitions. Second operand has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:16,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:33:16,706 INFO L93 Difference]: Finished difference Result 1194 states and 2858 transitions. [2022-03-15 16:33:16,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:33:16,707 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:33:16,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:33:16,710 INFO L225 Difference]: With dead ends: 1194 [2022-03-15 16:33:16,710 INFO L226 Difference]: Without dead ends: 1188 [2022-03-15 16:33:16,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=342, Invalid=2850, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:33:16,713 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 81 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:33:16,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 199 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 396 Invalid, 0 Unknown, 469 Unchecked, 0.2s Time] [2022-03-15 16:33:16,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2022-03-15 16:33:16,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 857. [2022-03-15 16:33:16,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.4661214953271027) internal successors, (2111), 856 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:16,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2111 transitions. [2022-03-15 16:33:16,726 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2111 transitions. Word has length 26 [2022-03-15 16:33:16,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:33:16,726 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 2111 transitions. [2022-03-15 16:33:16,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:16,726 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2111 transitions. [2022-03-15 16:33:16,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:33:16,727 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:33:16,727 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:33:16,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-15 16:33:16,939 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,SelfDestructingSolverStorable37 [2022-03-15 16:33:16,939 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:33:16,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:33:16,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1093121440, now seen corresponding path program 34 times [2022-03-15 16:33:16,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:33:16,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213946783] [2022-03-15 16:33:16,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:33:16,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:33:16,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:33:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:17,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:33:17,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213946783] [2022-03-15 16:33:17,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213946783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:33:17,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909847898] [2022-03-15 16:33:17,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:33:17,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:17,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:33:17,172 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) [2022-03-15 16:33:17,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 16:33:17,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:33:17,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:33:17,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:33:17,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:33:17,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:17,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:17,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:17,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:17,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:17,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:17,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:17,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:17,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-15 16:33:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:17,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:33:17,730 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:33:17,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-15 16:33:17,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:17,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:17,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:17,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:17,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:17,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:17,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:17,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:17,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-15 16:33:17,966 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:17,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909847898] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:33:17,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:33:17,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-15 16:33:17,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298554770] [2022-03-15 16:33:17,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:33:17,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:33:17,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:33:17,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:33:17,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:33:17,967 INFO L87 Difference]: Start difference. First operand 857 states and 2111 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-15 16:33:18,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:33:18,920 INFO L93 Difference]: Finished difference Result 1262 states and 3022 transitions. [2022-03-15 16:33:18,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:33:18,921 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 26 [2022-03-15 16:33:18,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:33:18,925 INFO L225 Difference]: With dead ends: 1262 [2022-03-15 16:33:18,925 INFO L226 Difference]: Without dead ends: 1259 [2022-03-15 16:33:18,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=310, Invalid=2240, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:33:18,928 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 82 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:33:18,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 172 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 607 Invalid, 0 Unknown, 271 Unchecked, 0.3s Time] [2022-03-15 16:33:18,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-03-15 16:33:18,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 863. [2022-03-15 16:33:18,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 2.4628770301624128) internal successors, (2123), 862 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:18,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2123 transitions. [2022-03-15 16:33:18,942 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2123 transitions. Word has length 26 [2022-03-15 16:33:18,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:33:18,942 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 2123 transitions. [2022-03-15 16:33:18,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-15 16:33:18,942 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2123 transitions. [2022-03-15 16:33:18,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:33:18,943 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:33:18,943 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:33:18,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-15 16:33:19,155 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,SelfDestructingSolverStorable38 [2022-03-15 16:33:19,155 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:33:19,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:33:19,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1170935528, now seen corresponding path program 35 times [2022-03-15 16:33:19,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:33:19,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984931870] [2022-03-15 16:33:19,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:33:19,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:33:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:33:19,393 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:19,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:33:19,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984931870] [2022-03-15 16:33:19,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984931870] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:33:19,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271020426] [2022-03-15 16:33:19,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:33:19,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:19,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:33:19,394 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) [2022-03-15 16:33:19,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 16:33:19,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:33:19,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:33:19,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:33:19,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:33:19,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:19,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:19,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:19,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:19,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:19,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:19,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-15 16:33:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:19,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:33:19,943 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:33:19,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-15 16:33:20,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:20,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:20,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:20,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:20,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:20,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:20,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:20,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:20,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-15 16:33:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:20,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271020426] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:33:20,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:33:20,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-15 16:33:20,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407902451] [2022-03-15 16:33:20,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:33:20,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:33:20,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:33:20,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:33:20,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:33:20,147 INFO L87 Difference]: Start difference. First operand 863 states and 2123 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-15 16:33:21,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:33:21,120 INFO L93 Difference]: Finished difference Result 1252 states and 2968 transitions. [2022-03-15 16:33:21,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:33:21,121 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 26 [2022-03-15 16:33:21,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:33:21,124 INFO L225 Difference]: With dead ends: 1252 [2022-03-15 16:33:21,124 INFO L226 Difference]: Without dead ends: 1249 [2022-03-15 16:33:21,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=335, Invalid=2317, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:33:21,125 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 119 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:33:21,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 146 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 418 Invalid, 0 Unknown, 235 Unchecked, 0.2s Time] [2022-03-15 16:33:21,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2022-03-15 16:33:21,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 861. [2022-03-15 16:33:21,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 2.4651162790697674) internal successors, (2120), 860 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:21,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2120 transitions. [2022-03-15 16:33:21,138 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2120 transitions. Word has length 26 [2022-03-15 16:33:21,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:33:21,138 INFO L470 AbstractCegarLoop]: Abstraction has 861 states and 2120 transitions. [2022-03-15 16:33:21,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-15 16:33:21,138 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2120 transitions. [2022-03-15 16:33:21,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:33:21,139 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:33:21,139 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:33:21,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-15 16:33:21,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-15 16:33:21,355 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:33:21,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:33:21,355 INFO L85 PathProgramCache]: Analyzing trace with hash 234980, now seen corresponding path program 36 times [2022-03-15 16:33:21,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:33:21,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095984906] [2022-03-15 16:33:21,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:33:21,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:33:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:33:21,588 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:21,588 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:33:21,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095984906] [2022-03-15 16:33:21,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095984906] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:33:21,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849928755] [2022-03-15 16:33:21,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:33:21,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:21,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:33:21,589 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) [2022-03-15 16:33:21,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 16:33:21,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:33:21,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:33:21,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:33:21,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:33:21,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:21,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:21,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:21,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:21,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:21,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:21,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-15 16:33:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:21,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:33:22,157 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:33:22,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-15 16:33:22,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:22,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:22,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:22,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:22,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:22,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:22,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:22,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:22,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-15 16:33:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:22,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849928755] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:33:22,345 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:33:22,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-15 16:33:22,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038211486] [2022-03-15 16:33:22,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:33:22,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:33:22,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:33:22,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:33:22,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:33:22,346 INFO L87 Difference]: Start difference. First operand 861 states and 2120 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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) [2022-03-15 16:33:23,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:33:23,185 INFO L93 Difference]: Finished difference Result 1190 states and 2852 transitions. [2022-03-15 16:33:23,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:33:23,185 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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 26 [2022-03-15 16:33:23,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:33:23,187 INFO L225 Difference]: With dead ends: 1190 [2022-03-15 16:33:23,187 INFO L226 Difference]: Without dead ends: 1183 [2022-03-15 16:33:23,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=303, Invalid=2049, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:33:23,188 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 110 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:33:23,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 127 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 409 Invalid, 0 Unknown, 206 Unchecked, 0.2s Time] [2022-03-15 16:33:23,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2022-03-15 16:33:23,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 868. [2022-03-15 16:33:23,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 2.4694348327566322) internal successors, (2141), 867 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:23,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2141 transitions. [2022-03-15 16:33:23,200 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2141 transitions. Word has length 26 [2022-03-15 16:33:23,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:33:23,200 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 2141 transitions. [2022-03-15 16:33:23,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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) [2022-03-15 16:33:23,201 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2141 transitions. [2022-03-15 16:33:23,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:33:23,202 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:33:23,202 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:33:23,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-15 16:33:23,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:23,402 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:33:23,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:33:23,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1008532964, now seen corresponding path program 37 times [2022-03-15 16:33:23,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:33:23,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163260985] [2022-03-15 16:33:23,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:33:23,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:33:23,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:33:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:23,624 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:33:23,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163260985] [2022-03-15 16:33:23,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163260985] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:33:23,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640734372] [2022-03-15 16:33:23,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:33:23,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:23,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:33:23,625 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) [2022-03-15 16:33:23,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 16:33:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:33:23,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:33:23,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:33:23,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:23,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:23,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:23,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:23,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:23,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:23,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:23,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:23,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-15 16:33:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:23,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:33:24,175 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:33:24,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-15 16:33:24,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:24,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:24,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:24,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:24,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:24,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:24,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:24,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:24,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-15 16:33:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:24,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640734372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:33:24,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:33:24,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-15 16:33:24,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481212300] [2022-03-15 16:33:24,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:33:24,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:33:24,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:33:24,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:33:24,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:33:24,345 INFO L87 Difference]: Start difference. First operand 868 states and 2141 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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) [2022-03-15 16:33:25,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:33:25,252 INFO L93 Difference]: Finished difference Result 1265 states and 3033 transitions. [2022-03-15 16:33:25,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:33:25,252 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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 26 [2022-03-15 16:33:25,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:33:25,255 INFO L225 Difference]: With dead ends: 1265 [2022-03-15 16:33:25,255 INFO L226 Difference]: Without dead ends: 1258 [2022-03-15 16:33:25,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=315, Invalid=2037, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:33:25,255 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 90 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:33:25,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 140 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 462 Invalid, 0 Unknown, 257 Unchecked, 0.2s Time] [2022-03-15 16:33:25,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2022-03-15 16:33:25,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 900. [2022-03-15 16:33:25,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 2.474972191323693) internal successors, (2225), 899 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2225 transitions. [2022-03-15 16:33:25,270 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2225 transitions. Word has length 26 [2022-03-15 16:33:25,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:33:25,271 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 2225 transitions. [2022-03-15 16:33:25,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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) [2022-03-15 16:33:25,271 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2225 transitions. [2022-03-15 16:33:25,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:33:25,272 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:33:25,272 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:33:25,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-15 16:33:25,487 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,SelfDestructingSolverStorable41 [2022-03-15 16:33:25,487 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:33:25,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:33:25,488 INFO L85 PathProgramCache]: Analyzing trace with hash -9411100, now seen corresponding path program 38 times [2022-03-15 16:33:25,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:33:25,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871189534] [2022-03-15 16:33:25,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:33:25,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:33:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:33:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:25,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:33:25,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871189534] [2022-03-15 16:33:25,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871189534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:33:25,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067982239] [2022-03-15 16:33:25,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:33:25,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:25,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:33:25,728 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) [2022-03-15 16:33:25,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 16:33:25,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:33:25,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:33:25,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:33:25,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:33:25,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:25,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:26,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:26,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:26,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:26,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:26,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:26,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:26,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-15 16:33:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:26,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:33:26,259 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:33:26,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-15 16:33:26,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:26,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:26,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:26,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:26,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:26,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:26,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:26,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:26,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-15 16:33:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:26,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067982239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:33:26,431 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:33:26,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-15 16:33:26,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633205874] [2022-03-15 16:33:26,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:33:26,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:33:26,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:33:26,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:33:26,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:33:26,436 INFO L87 Difference]: Start difference. First operand 900 states and 2225 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:27,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:33:27,295 INFO L93 Difference]: Finished difference Result 1181 states and 2881 transitions. [2022-03-15 16:33:27,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:33:27,296 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:33:27,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:33:27,297 INFO L225 Difference]: With dead ends: 1181 [2022-03-15 16:33:27,298 INFO L226 Difference]: Without dead ends: 1174 [2022-03-15 16:33:27,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=294, Invalid=1962, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:33:27,298 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:33:27,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 118 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 449 Invalid, 0 Unknown, 221 Unchecked, 0.2s Time] [2022-03-15 16:33:27,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2022-03-15 16:33:27,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 911. [2022-03-15 16:33:27,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 2.4835164835164836) internal successors, (2260), 910 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:27,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 2260 transitions. [2022-03-15 16:33:27,310 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 2260 transitions. Word has length 26 [2022-03-15 16:33:27,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:33:27,310 INFO L470 AbstractCegarLoop]: Abstraction has 911 states and 2260 transitions. [2022-03-15 16:33:27,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:27,311 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 2260 transitions. [2022-03-15 16:33:27,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:33:27,312 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:33:27,312 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:33:27,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-15 16:33:27,523 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,SelfDestructingSolverStorable42 [2022-03-15 16:33:27,523 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:33:27,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:33:27,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2100038610, now seen corresponding path program 39 times [2022-03-15 16:33:27,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:33:27,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858742287] [2022-03-15 16:33:27,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:33:27,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:33:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:33:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:27,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:33:27,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858742287] [2022-03-15 16:33:27,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858742287] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:33:27,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806326047] [2022-03-15 16:33:27,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:33:27,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:27,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:33:27,740 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) [2022-03-15 16:33:27,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 16:33:27,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:33:27,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:33:27,759 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:33:27,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:33:28,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:28,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:28,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:28,322 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:33:28,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2022-03-15 16:33:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:28,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:33:29,261 INFO L353 Elim1Store]: treesize reduction 24, result has 83.0 percent of original size [2022-03-15 16:33:29,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 138 [2022-03-15 16:33:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:38,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806326047] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:33:38,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:33:38,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 33 [2022-03-15 16:33:38,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413626700] [2022-03-15 16:33:38,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:33:38,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:33:38,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:33:38,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:33:38,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:33:38,021 INFO L87 Difference]: Start difference. First operand 911 states and 2260 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 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) [2022-03-15 16:33:39,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:33:39,414 INFO L93 Difference]: Finished difference Result 1339 states and 3202 transitions. [2022-03-15 16:33:39,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 16:33:39,414 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 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 26 [2022-03-15 16:33:39,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:33:39,417 INFO L225 Difference]: With dead ends: 1339 [2022-03-15 16:33:39,417 INFO L226 Difference]: Without dead ends: 1284 [2022-03-15 16:33:39,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=421, Invalid=3119, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 16:33:39,417 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 121 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 927 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:33:39,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 212 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 322 Invalid, 0 Unknown, 927 Unchecked, 0.2s Time] [2022-03-15 16:33:39,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2022-03-15 16:33:39,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 923. [2022-03-15 16:33:39,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 2.477223427331887) internal successors, (2284), 922 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:39,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2284 transitions. [2022-03-15 16:33:39,430 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2284 transitions. Word has length 26 [2022-03-15 16:33:39,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:33:39,431 INFO L470 AbstractCegarLoop]: Abstraction has 923 states and 2284 transitions. [2022-03-15 16:33:39,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 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) [2022-03-15 16:33:39,431 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2284 transitions. [2022-03-15 16:33:39,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:33:39,432 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:33:39,432 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:33:39,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-15 16:33:39,632 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,SelfDestructingSolverStorable43 [2022-03-15 16:33:39,633 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:33:39,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:33:39,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1232654318, now seen corresponding path program 40 times [2022-03-15 16:33:39,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:33:39,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371780514] [2022-03-15 16:33:39,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:33:39,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:33:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:33:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:39,853 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:33:39,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371780514] [2022-03-15 16:33:39,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371780514] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:33:39,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427048810] [2022-03-15 16:33:39,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:33:39,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:39,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:33:39,854 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) [2022-03-15 16:33:39,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 16:33:39,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:33:39,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:33:39,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:33:39,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:33:40,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:40,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:40,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:40,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:40,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:40,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:40,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:40,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:40,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-15 16:33:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:40,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:33:40,383 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:33:40,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-15 16:33:40,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:40,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:40,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:40,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:40,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:40,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:40,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:40,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:40,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-15 16:33:40,548 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:40,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427048810] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:33:40,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:33:40,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-15 16:33:40,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479134358] [2022-03-15 16:33:40,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:33:40,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:33:40,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:33:40,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:33:40,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:33:40,549 INFO L87 Difference]: Start difference. First operand 923 states and 2284 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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) [2022-03-15 16:33:42,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:33:42,008 INFO L93 Difference]: Finished difference Result 1394 states and 3319 transitions. [2022-03-15 16:33:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 16:33:42,009 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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 26 [2022-03-15 16:33:42,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:33:42,011 INFO L225 Difference]: With dead ends: 1394 [2022-03-15 16:33:42,011 INFO L226 Difference]: Without dead ends: 1309 [2022-03-15 16:33:42,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=518, Invalid=3022, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 16:33:42,012 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 154 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:33:42,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 228 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 717 Invalid, 0 Unknown, 247 Unchecked, 0.3s Time] [2022-03-15 16:33:42,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2022-03-15 16:33:42,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 975. [2022-03-15 16:33:42,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.452772073921971) internal successors, (2389), 974 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:42,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2389 transitions. [2022-03-15 16:33:42,030 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2389 transitions. Word has length 26 [2022-03-15 16:33:42,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:33:42,030 INFO L470 AbstractCegarLoop]: Abstraction has 975 states and 2389 transitions. [2022-03-15 16:33:42,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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) [2022-03-15 16:33:42,031 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2389 transitions. [2022-03-15 16:33:42,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:33:42,032 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:33:42,032 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:33:42,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-15 16:33:42,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:42,232 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:33:42,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:33:42,233 INFO L85 PathProgramCache]: Analyzing trace with hash 715108594, now seen corresponding path program 41 times [2022-03-15 16:33:42,233 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:33:42,233 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640031948] [2022-03-15 16:33:42,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:33:42,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:33:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:33:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:42,457 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:33:42,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640031948] [2022-03-15 16:33:42,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640031948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:33:42,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846442547] [2022-03-15 16:33:42,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:33:42,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:42,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:33:42,458 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) [2022-03-15 16:33:42,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 16:33:42,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:33:42,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:33:42,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:33:42,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:33:42,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:42,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:42,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:42,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:42,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:42,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:42,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-15 16:33:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:42,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:33:42,983 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:33:42,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-15 16:33:43,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:43,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:43,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:43,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:43,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:43,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:43,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:43,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:43,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-15 16:33:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:43,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846442547] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:33:43,169 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:33:43,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-15 16:33:43,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254724388] [2022-03-15 16:33:43,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:33:43,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:33:43,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:33:43,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:33:43,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:33:43,170 INFO L87 Difference]: Start difference. First operand 975 states and 2389 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-15 16:33:44,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:33:44,544 INFO L93 Difference]: Finished difference Result 1393 states and 3309 transitions. [2022-03-15 16:33:44,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:33:44,544 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 26 [2022-03-15 16:33:44,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:33:44,547 INFO L225 Difference]: With dead ends: 1393 [2022-03-15 16:33:44,547 INFO L226 Difference]: Without dead ends: 1379 [2022-03-15 16:33:44,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=530, Invalid=3252, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 16:33:44,548 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:33:44,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 98 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 460 Invalid, 0 Unknown, 137 Unchecked, 0.2s Time] [2022-03-15 16:33:44,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2022-03-15 16:33:44,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 970. [2022-03-15 16:33:44,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 969 states have (on average 2.454076367389061) internal successors, (2378), 969 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:44,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 2378 transitions. [2022-03-15 16:33:44,561 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 2378 transitions. Word has length 26 [2022-03-15 16:33:44,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:33:44,561 INFO L470 AbstractCegarLoop]: Abstraction has 970 states and 2378 transitions. [2022-03-15 16:33:44,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-15 16:33:44,561 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 2378 transitions. [2022-03-15 16:33:44,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:33:44,562 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:33:44,562 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:33:44,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-15 16:33:44,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:44,775 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:33:44,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:33:44,776 INFO L85 PathProgramCache]: Analyzing trace with hash -597566298, now seen corresponding path program 42 times [2022-03-15 16:33:44,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:33:44,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705540160] [2022-03-15 16:33:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:33:44,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:33:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:33:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:44,993 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:33:44,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705540160] [2022-03-15 16:33:44,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705540160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:33:44,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082152100] [2022-03-15 16:33:44,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:33:44,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:44,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:33:44,994 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) [2022-03-15 16:33:45,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 16:33:45,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:33:45,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:33:45,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:33:45,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:33:45,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:45,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:45,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:45,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:45,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:45,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:45,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-15 16:33:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:45,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:33:45,500 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:33:45,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-15 16:33:45,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:45,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:45,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:45,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:45,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:45,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:45,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:45,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:45,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-15 16:33:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:45,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082152100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:33:45,667 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:33:45,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-15 16:33:45,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040742855] [2022-03-15 16:33:45,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:33:45,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:33:45,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:33:45,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:33:45,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:33:45,668 INFO L87 Difference]: Start difference. First operand 970 states and 2378 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:47,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:33:47,366 INFO L93 Difference]: Finished difference Result 1579 states and 3725 transitions. [2022-03-15 16:33:47,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 16:33:47,367 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:33:47,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:33:47,369 INFO L225 Difference]: With dead ends: 1579 [2022-03-15 16:33:47,369 INFO L226 Difference]: Without dead ends: 1556 [2022-03-15 16:33:47,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=541, Invalid=3619, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 16:33:47,370 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 171 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:33:47,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 179 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:33:47,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2022-03-15 16:33:47,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1009. [2022-03-15 16:33:47,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 2.4603174603174605) internal successors, (2480), 1008 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:47,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 2480 transitions. [2022-03-15 16:33:47,384 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 2480 transitions. Word has length 26 [2022-03-15 16:33:47,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:33:47,384 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 2480 transitions. [2022-03-15 16:33:47,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:47,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 2480 transitions. [2022-03-15 16:33:47,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:33:47,385 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:33:47,385 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:33:47,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-15 16:33:47,586 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,SelfDestructingSolverStorable46 [2022-03-15 16:33:47,586 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:33:47,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:33:47,586 INFO L85 PathProgramCache]: Analyzing trace with hash 707454872, now seen corresponding path program 43 times [2022-03-15 16:33:47,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:33:47,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010142544] [2022-03-15 16:33:47,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:33:47,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:33:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:33:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:47,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:33:47,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010142544] [2022-03-15 16:33:47,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010142544] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:33:47,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660208756] [2022-03-15 16:33:47,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:33:47,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:47,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:33:47,817 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) [2022-03-15 16:33:47,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 16:33:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:33:47,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:33:47,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:33:48,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:48,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:48,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:48,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:48,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:48,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:48,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:48,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:48,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-15 16:33:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:48,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:33:48,346 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:33:48,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-15 16:33:48,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:48,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:48,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:48,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:48,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:48,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:48,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:48,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:48,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-15 16:33:48,500 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:48,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660208756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:33:48,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:33:48,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-15 16:33:48,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462843597] [2022-03-15 16:33:48,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:33:48,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:33:48,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:33:48,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:33:48,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:33:48,501 INFO L87 Difference]: Start difference. First operand 1009 states and 2480 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-15 16:33:49,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:33:49,758 INFO L93 Difference]: Finished difference Result 1387 states and 3307 transitions. [2022-03-15 16:33:49,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:33:49,758 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 26 [2022-03-15 16:33:49,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:33:49,768 INFO L225 Difference]: With dead ends: 1387 [2022-03-15 16:33:49,768 INFO L226 Difference]: Without dead ends: 1342 [2022-03-15 16:33:49,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=451, Invalid=2519, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:33:49,769 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 134 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:33:49,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 140 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 663 Invalid, 0 Unknown, 159 Unchecked, 0.3s Time] [2022-03-15 16:33:49,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2022-03-15 16:33:49,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 993. [2022-03-15 16:33:49,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 2.467741935483871) internal successors, (2448), 992 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:49,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 2448 transitions. [2022-03-15 16:33:49,781 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 2448 transitions. Word has length 26 [2022-03-15 16:33:49,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:33:49,781 INFO L470 AbstractCegarLoop]: Abstraction has 993 states and 2448 transitions. [2022-03-15 16:33:49,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-15 16:33:49,781 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 2448 transitions. [2022-03-15 16:33:49,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:33:49,782 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:33:49,782 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:33:49,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-15 16:33:49,991 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,SelfDestructingSolverStorable47 [2022-03-15 16:33:49,991 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:33:49,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:33:49,992 INFO L85 PathProgramCache]: Analyzing trace with hash 277025134, now seen corresponding path program 44 times [2022-03-15 16:33:49,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:33:49,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592311941] [2022-03-15 16:33:49,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:33:49,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:33:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:33:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:50,190 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:33:50,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592311941] [2022-03-15 16:33:50,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592311941] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:33:50,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567712886] [2022-03-15 16:33:50,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:33:50,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:50,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:33:50,192 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) [2022-03-15 16:33:50,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 16:33:50,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:33:50,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:33:50,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:33:50,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:33:50,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:50,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:50,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:50,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:50,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:50,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:50,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:50,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-15 16:33:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:50,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:33:50,695 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:33:50,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-15 16:33:50,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:50,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:50,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:50,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:50,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:50,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:50,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:50,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:50,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 3 [2022-03-15 16:33:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:50,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567712886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:33:50,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:33:50,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 23 [2022-03-15 16:33:50,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563655731] [2022-03-15 16:33:50,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:33:50,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:33:50,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:33:50,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:33:50,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:33:50,871 INFO L87 Difference]: Start difference. First operand 993 states and 2448 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:51,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:33:51,790 INFO L93 Difference]: Finished difference Result 1343 states and 3128 transitions. [2022-03-15 16:33:51,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:33:51,791 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:33:51,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:33:51,798 INFO L225 Difference]: With dead ends: 1343 [2022-03-15 16:33:51,799 INFO L226 Difference]: Without dead ends: 1285 [2022-03-15 16:33:51,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=323, Invalid=1933, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:33:51,799 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 230 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:33:51,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 212 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 899 Invalid, 0 Unknown, 11 Unchecked, 0.4s Time] [2022-03-15 16:33:51,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2022-03-15 16:33:51,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1081. [2022-03-15 16:33:51,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 2.4805555555555556) internal successors, (2679), 1080 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:51,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 2679 transitions. [2022-03-15 16:33:51,814 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 2679 transitions. Word has length 26 [2022-03-15 16:33:51,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:33:51,814 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 2679 transitions. [2022-03-15 16:33:51,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:33:51,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 2679 transitions. [2022-03-15 16:33:51,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:33:51,816 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:33:51,816 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:33:51,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-15 16:33:52,031 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,SelfDestructingSolverStorable48 [2022-03-15 16:33:52,032 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:33:52,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:33:52,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1792998102, now seen corresponding path program 45 times [2022-03-15 16:33:52,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:33:52,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199207229] [2022-03-15 16:33:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:33:52,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:33:52,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:33:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:52,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:33:52,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199207229] [2022-03-15 16:33:52,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199207229] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:33:52,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685338675] [2022-03-15 16:33:52,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:33:52,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:33:52,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:33:52,242 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) [2022-03-15 16:33:52,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 16:33:52,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:33:52,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:33:52,261 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:33:52,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:33:52,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:52,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:52,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:52,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:52,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:52,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:33:52,617 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:33:52,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 61 treesize of output 85 [2022-03-15 16:33:52,872 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:52,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:33:53,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:53,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:53,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:53,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:33:53,402 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:33:53,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 58 treesize of output 131 [2022-03-15 16:33:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:33:55,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685338675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:33:55,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:33:55,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 34 [2022-03-15 16:33:55,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779218196] [2022-03-15 16:33:55,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:33:55,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:33:55,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:33:55,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:33:55,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:33:55,557 INFO L87 Difference]: Start difference. First operand 1081 states and 2679 transitions. Second operand has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:01,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:01,573 INFO L93 Difference]: Finished difference Result 2055 states and 4788 transitions. [2022-03-15 16:34:01,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-15 16:34:01,574 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:34:01,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:01,577 INFO L225 Difference]: With dead ends: 2055 [2022-03-15 16:34:01,577 INFO L226 Difference]: Without dead ends: 1985 [2022-03-15 16:34:01,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 24 SyntacticMatches, 14 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5247 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2012, Invalid=12508, Unknown=0, NotChecked=0, Total=14520 [2022-03-15 16:34:01,579 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 388 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1690 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 2064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 270 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:01,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 395 Invalid, 2064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1690 Invalid, 0 Unknown, 270 Unchecked, 0.8s Time] [2022-03-15 16:34:01,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2022-03-15 16:34:01,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1177. [2022-03-15 16:34:01,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 2.5008503401360542) internal successors, (2941), 1176 states have internal predecessors, (2941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:01,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 2941 transitions. [2022-03-15 16:34:01,602 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 2941 transitions. Word has length 26 [2022-03-15 16:34:01,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:01,604 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 2941 transitions. [2022-03-15 16:34:01,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:01,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 2941 transitions. [2022-03-15 16:34:01,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:34:01,606 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:01,606 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:01,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-15 16:34:01,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:01,819 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:01,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:01,820 INFO L85 PathProgramCache]: Analyzing trace with hash 771199462, now seen corresponding path program 46 times [2022-03-15 16:34:01,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:01,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410511654] [2022-03-15 16:34:01,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:01,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:02,056 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:02,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410511654] [2022-03-15 16:34:02,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410511654] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:02,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494202759] [2022-03-15 16:34:02,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:34:02,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:02,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:02,058 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) [2022-03-15 16:34:02,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 16:34:02,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:34:02,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:02,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:34:02,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:02,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:02,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:02,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:02,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:02,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:02,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:02,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:02,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:02,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-15 16:34:02,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:02,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:02,563 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:34:02,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-15 16:34:02,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:02,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:02,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:02,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:02,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:02,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:02,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:02,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:02,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-15 16:34:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:02,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494202759] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:02,784 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:02,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2022-03-15 16:34:02,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642961149] [2022-03-15 16:34:02,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:02,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:34:02,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:02,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:34:02,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:34:02,785 INFO L87 Difference]: Start difference. First operand 1177 states and 2941 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:04,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:04,486 INFO L93 Difference]: Finished difference Result 1541 states and 3710 transitions. [2022-03-15 16:34:04,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:34:04,487 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:34:04,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:04,489 INFO L225 Difference]: With dead ends: 1541 [2022-03-15 16:34:04,489 INFO L226 Difference]: Without dead ends: 1473 [2022-03-15 16:34:04,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=540, Invalid=3620, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 16:34:04,490 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 215 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:04,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 181 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:34:04,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2022-03-15 16:34:04,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1230. [2022-03-15 16:34:04,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 2.48006509357201) internal successors, (3048), 1229 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:04,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 3048 transitions. [2022-03-15 16:34:04,507 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 3048 transitions. Word has length 26 [2022-03-15 16:34:04,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:04,507 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 3048 transitions. [2022-03-15 16:34:04,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:04,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 3048 transitions. [2022-03-15 16:34:04,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:34:04,509 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:04,509 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:04,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-15 16:34:04,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:04,723 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:04,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:04,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1127291350, now seen corresponding path program 47 times [2022-03-15 16:34:04,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:04,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852453257] [2022-03-15 16:34:04,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:04,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:04,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:04,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852453257] [2022-03-15 16:34:04,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852453257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:04,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397938042] [2022-03-15 16:34:04,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:34:04,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:04,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:04,946 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) [2022-03-15 16:34:04,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 16:34:04,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:34:04,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:04,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:34:04,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:05,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:05,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:05,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:05,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:05,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:05,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:05,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:05,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:05,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:05,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-15 16:34:05,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:05,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:05,461 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:34:05,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-15 16:34:05,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:05,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:05,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:05,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:05,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:05,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:05,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:05,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:05,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-15 16:34:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:05,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397938042] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:05,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:05,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2022-03-15 16:34:05,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400496804] [2022-03-15 16:34:05,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:05,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:34:05,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:05,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:34:05,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:34:05,705 INFO L87 Difference]: Start difference. First operand 1230 states and 3048 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:07,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:07,529 INFO L93 Difference]: Finished difference Result 1414 states and 3424 transitions. [2022-03-15 16:34:07,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 16:34:07,530 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:34:07,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:07,533 INFO L225 Difference]: With dead ends: 1414 [2022-03-15 16:34:07,533 INFO L226 Difference]: Without dead ends: 1388 [2022-03-15 16:34:07,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=475, Invalid=3431, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 16:34:07,535 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 150 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:07,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 226 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:34:07,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2022-03-15 16:34:07,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1244. [2022-03-15 16:34:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 2.474658085277554) internal successors, (3076), 1243 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:07,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 3076 transitions. [2022-03-15 16:34:07,551 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 3076 transitions. Word has length 26 [2022-03-15 16:34:07,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:07,551 INFO L470 AbstractCegarLoop]: Abstraction has 1244 states and 3076 transitions. [2022-03-15 16:34:07,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:07,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 3076 transitions. [2022-03-15 16:34:07,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:34:07,552 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:07,553 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:07,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-15 16:34:07,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:07,767 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:07,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:07,768 INFO L85 PathProgramCache]: Analyzing trace with hash -509922762, now seen corresponding path program 48 times [2022-03-15 16:34:07,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:07,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807162054] [2022-03-15 16:34:07,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:07,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:08,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:08,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807162054] [2022-03-15 16:34:08,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807162054] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:08,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722952533] [2022-03-15 16:34:08,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:34:08,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:08,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:08,020 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) [2022-03-15 16:34:08,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 16:34:08,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:34:08,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:08,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:34:08,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:08,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:08,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:08,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:08,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:08,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:08,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:08,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:08,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-15 16:34:08,352 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:08,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:08,559 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:34:08,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-15 16:34:08,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:08,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:08,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:08,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:08,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:08,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:08,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:08,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:08,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-15 16:34:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:08,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722952533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:08,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:08,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-15 16:34:08,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245200140] [2022-03-15 16:34:08,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:08,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:34:08,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:08,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:34:08,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:34:08,784 INFO L87 Difference]: Start difference. First operand 1244 states and 3076 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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) [2022-03-15 16:34:10,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:10,047 INFO L93 Difference]: Finished difference Result 1765 states and 4214 transitions. [2022-03-15 16:34:10,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:34:10,047 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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 26 [2022-03-15 16:34:10,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:10,050 INFO L225 Difference]: With dead ends: 1765 [2022-03-15 16:34:10,050 INFO L226 Difference]: Without dead ends: 1740 [2022-03-15 16:34:10,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=368, Invalid=2602, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:34:10,050 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 165 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:10,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 249 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 981 Invalid, 0 Unknown, 178 Unchecked, 0.4s Time] [2022-03-15 16:34:10,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2022-03-15 16:34:10,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1287. [2022-03-15 16:34:10,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 2.4805598755832037) internal successors, (3190), 1286 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:10,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 3190 transitions. [2022-03-15 16:34:10,068 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 3190 transitions. Word has length 26 [2022-03-15 16:34:10,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:10,068 INFO L470 AbstractCegarLoop]: Abstraction has 1287 states and 3190 transitions. [2022-03-15 16:34:10,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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) [2022-03-15 16:34:10,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 3190 transitions. [2022-03-15 16:34:10,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:34:10,070 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:10,070 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:10,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 16:34:10,270 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,SelfDestructingSolverStorable52 [2022-03-15 16:34:10,270 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:10,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:10,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1776670478, now seen corresponding path program 49 times [2022-03-15 16:34:10,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:10,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558485334] [2022-03-15 16:34:10,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:10,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:10,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:10,473 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:10,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558485334] [2022-03-15 16:34:10,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558485334] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:10,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547757986] [2022-03-15 16:34:10,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:34:10,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:10,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:10,475 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) [2022-03-15 16:34:10,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 16:34:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:10,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:34:10,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:10,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:10,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:10,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:10,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:10,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:10,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:10,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:10,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:10,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-15 16:34:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:10,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:11,017 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:34:11,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-15 16:34:11,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:11,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:11,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:11,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:11,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:11,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:11,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:11,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:11,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 3 [2022-03-15 16:34:11,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:11,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547757986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:11,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:11,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 23 [2022-03-15 16:34:11,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377408170] [2022-03-15 16:34:11,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:11,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:34:11,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:11,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:34:11,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:34:11,200 INFO L87 Difference]: Start difference. First operand 1287 states and 3190 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:12,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:12,276 INFO L93 Difference]: Finished difference Result 1693 states and 3972 transitions. [2022-03-15 16:34:12,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:34:12,277 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:34:12,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:12,279 INFO L225 Difference]: With dead ends: 1693 [2022-03-15 16:34:12,279 INFO L226 Difference]: Without dead ends: 1659 [2022-03-15 16:34:12,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=353, Invalid=2197, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:34:12,280 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 216 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:12,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 263 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 973 Invalid, 0 Unknown, 16 Unchecked, 0.4s Time] [2022-03-15 16:34:12,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2022-03-15 16:34:12,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1368. [2022-03-15 16:34:12,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 2.5003657644476958) internal successors, (3418), 1367 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:12,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 3418 transitions. [2022-03-15 16:34:12,304 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 3418 transitions. Word has length 26 [2022-03-15 16:34:12,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:12,304 INFO L470 AbstractCegarLoop]: Abstraction has 1368 states and 3418 transitions. [2022-03-15 16:34:12,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:12,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 3418 transitions. [2022-03-15 16:34:12,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:34:12,305 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:12,305 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:12,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-15 16:34:12,506 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,SelfDestructingSolverStorable53 [2022-03-15 16:34:12,506 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:12,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:12,507 INFO L85 PathProgramCache]: Analyzing trace with hash -719982534, now seen corresponding path program 50 times [2022-03-15 16:34:12,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:12,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540081930] [2022-03-15 16:34:12,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:12,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:12,685 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:12,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540081930] [2022-03-15 16:34:12,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540081930] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:12,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431182835] [2022-03-15 16:34:12,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:34:12,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:12,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:12,697 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) [2022-03-15 16:34:12,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 16:34:12,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:34:12,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:12,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:34:12,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:13,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:13,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:13,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:13,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:13,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:13,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:13,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:13,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:13,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-15 16:34:13,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:13,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:13,216 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:34:13,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-15 16:34:13,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:13,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:13,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:13,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:13,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:13,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:13,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:13,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:13,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 3 [2022-03-15 16:34:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:13,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431182835] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:13,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:13,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 23 [2022-03-15 16:34:13,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001176242] [2022-03-15 16:34:13,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:13,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:34:13,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:13,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:34:13,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:34:13,408 INFO L87 Difference]: Start difference. First operand 1368 states and 3418 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) [2022-03-15 16:34:14,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:14,454 INFO L93 Difference]: Finished difference Result 1665 states and 3913 transitions. [2022-03-15 16:34:14,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:34:14,455 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 26 [2022-03-15 16:34:14,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:14,458 INFO L225 Difference]: With dead ends: 1665 [2022-03-15 16:34:14,458 INFO L226 Difference]: Without dead ends: 1662 [2022-03-15 16:34:14,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:34:14,458 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 195 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:14,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 234 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 940 Invalid, 0 Unknown, 80 Unchecked, 0.4s Time] [2022-03-15 16:34:14,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2022-03-15 16:34:14,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1364. [2022-03-15 16:34:14,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1363 states have (on average 2.5018341892883345) internal successors, (3410), 1363 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 3410 transitions. [2022-03-15 16:34:14,478 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 3410 transitions. Word has length 26 [2022-03-15 16:34:14,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:14,478 INFO L470 AbstractCegarLoop]: Abstraction has 1364 states and 3410 transitions. [2022-03-15 16:34:14,478 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) [2022-03-15 16:34:14,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 3410 transitions. [2022-03-15 16:34:14,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:34:14,480 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:14,480 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:14,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-15 16:34:14,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:14,695 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:14,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:14,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1113980334, now seen corresponding path program 51 times [2022-03-15 16:34:14,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:14,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001434312] [2022-03-15 16:34:14,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:14,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:14,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:14,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001434312] [2022-03-15 16:34:14,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001434312] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:14,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5051514] [2022-03-15 16:34:14,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:34:14,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:14,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:14,908 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) [2022-03-15 16:34:14,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 16:34:14,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:34:14,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:14,930 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:34:14,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:15,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:15,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:15,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:15,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:15,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:15,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:15,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:15,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:34:15,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 61 treesize of output 85 [2022-03-15 16:34:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:15,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:16,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:16,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:16,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:16,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:16,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:34:16,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 58 treesize of output 131 [2022-03-15 16:34:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:18,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5051514] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:18,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:18,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 34 [2022-03-15 16:34:18,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338546525] [2022-03-15 16:34:18,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:18,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:34:18,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:18,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:34:18,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:34:18,548 INFO L87 Difference]: Start difference. First operand 1364 states and 3410 transitions. Second operand has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:23,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:23,039 INFO L93 Difference]: Finished difference Result 2389 states and 5627 transitions. [2022-03-15 16:34:23,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-15 16:34:23,039 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:34:23,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:23,042 INFO L225 Difference]: With dead ends: 2389 [2022-03-15 16:34:23,042 INFO L226 Difference]: Without dead ends: 2321 [2022-03-15 16:34:23,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 24 SyntacticMatches, 9 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3062 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1586, Invalid=8314, Unknown=0, NotChecked=0, Total=9900 [2022-03-15 16:34:23,043 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 409 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:23,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 366 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1293 Invalid, 0 Unknown, 92 Unchecked, 0.7s Time] [2022-03-15 16:34:23,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2321 states. [2022-03-15 16:34:23,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2321 to 1406. [2022-03-15 16:34:23,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1406 states, 1405 states have (on average 2.498932384341637) internal successors, (3511), 1405 states have internal predecessors, (3511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:23,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1406 states to 1406 states and 3511 transitions. [2022-03-15 16:34:23,065 INFO L78 Accepts]: Start accepts. Automaton has 1406 states and 3511 transitions. Word has length 26 [2022-03-15 16:34:23,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:23,065 INFO L470 AbstractCegarLoop]: Abstraction has 1406 states and 3511 transitions. [2022-03-15 16:34:23,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:23,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1406 states and 3511 transitions. [2022-03-15 16:34:23,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:34:23,067 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:23,067 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:23,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-15 16:34:23,275 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,SelfDestructingSolverStorable55 [2022-03-15 16:34:23,275 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:23,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:23,276 INFO L85 PathProgramCache]: Analyzing trace with hash -3388566, now seen corresponding path program 52 times [2022-03-15 16:34:23,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:23,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195317034] [2022-03-15 16:34:23,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:23,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:23,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:23,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195317034] [2022-03-15 16:34:23,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195317034] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:23,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138813530] [2022-03-15 16:34:23,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:34:23,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:23,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:23,493 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) [2022-03-15 16:34:23,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 16:34:23,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:34:23,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:23,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:34:23,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:23,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:23,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:23,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:23,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:23,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:23,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:23,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:23,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:23,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-15 16:34:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:23,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:24,003 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:34:24,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-15 16:34:24,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:24,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:24,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:24,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:24,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:24,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:24,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:24,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:24,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-15 16:34:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:24,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138813530] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:24,249 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:24,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2022-03-15 16:34:24,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740720982] [2022-03-15 16:34:24,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:24,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:34:24,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:24,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:34:24,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:34:24,250 INFO L87 Difference]: Start difference. First operand 1406 states and 3511 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:25,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:25,735 INFO L93 Difference]: Finished difference Result 1692 states and 4095 transitions. [2022-03-15 16:34:25,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 16:34:25,735 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:34:25,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:25,738 INFO L225 Difference]: With dead ends: 1692 [2022-03-15 16:34:25,738 INFO L226 Difference]: Without dead ends: 1608 [2022-03-15 16:34:25,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=485, Invalid=2821, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:34:25,738 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 187 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:25,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 181 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:34:25,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2022-03-15 16:34:25,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1433. [2022-03-15 16:34:25,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 2.4797486033519553) internal successors, (3551), 1432 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:25,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 3551 transitions. [2022-03-15 16:34:25,758 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 3551 transitions. Word has length 26 [2022-03-15 16:34:25,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:25,759 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 3551 transitions. [2022-03-15 16:34:25,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:25,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 3551 transitions. [2022-03-15 16:34:25,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:34:25,760 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:25,760 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:25,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-15 16:34:25,976 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,SelfDestructingSolverStorable56 [2022-03-15 16:34:25,977 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:25,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:25,977 INFO L85 PathProgramCache]: Analyzing trace with hash 908041902, now seen corresponding path program 53 times [2022-03-15 16:34:25,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:25,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849115443] [2022-03-15 16:34:25,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:25,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:25,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:26,198 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:26,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849115443] [2022-03-15 16:34:26,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849115443] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:26,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59075339] [2022-03-15 16:34:26,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:34:26,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:26,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:26,199 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) [2022-03-15 16:34:26,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 16:34:26,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:34:26,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:26,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:34:26,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:26,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:26,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:26,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:26,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:26,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:26,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:26,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:26,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-15 16:34:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:26,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:26,691 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:34:26,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-15 16:34:26,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:26,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:26,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:26,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:26,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:26,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:26,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:26,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:26,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-15 16:34:26,949 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:26,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59075339] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:26,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:26,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2022-03-15 16:34:26,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553087448] [2022-03-15 16:34:26,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:26,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:34:26,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:26,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:34:26,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:34:26,950 INFO L87 Difference]: Start difference. First operand 1433 states and 3551 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:28,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:28,306 INFO L93 Difference]: Finished difference Result 1636 states and 3970 transitions. [2022-03-15 16:34:28,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:34:28,306 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:34:28,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:28,309 INFO L225 Difference]: With dead ends: 1636 [2022-03-15 16:34:28,309 INFO L226 Difference]: Without dead ends: 1626 [2022-03-15 16:34:28,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=394, Invalid=2686, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 16:34:28,309 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 159 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:28,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 186 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:34:28,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2022-03-15 16:34:28,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1442. [2022-03-15 16:34:28,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 2.479528105482304) internal successors, (3573), 1441 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 3573 transitions. [2022-03-15 16:34:28,325 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 3573 transitions. Word has length 26 [2022-03-15 16:34:28,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:28,325 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 3573 transitions. [2022-03-15 16:34:28,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:28,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 3573 transitions. [2022-03-15 16:34:28,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:34:28,327 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:28,327 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:28,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-15 16:34:28,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:28,528 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:28,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:28,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1403227622, now seen corresponding path program 54 times [2022-03-15 16:34:28,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:28,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078858448] [2022-03-15 16:34:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:28,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:28,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:28,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078858448] [2022-03-15 16:34:28,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078858448] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:28,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070579904] [2022-03-15 16:34:28,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:34:28,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:28,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:28,604 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) [2022-03-15 16:34:28,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 16:34:28,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:34:28,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:28,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:34:28,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:28,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:28,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070579904] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:28,909 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:28,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-03-15 16:34:28,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199051318] [2022-03-15 16:34:28,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:28,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:34:28,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:28,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:34:28,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:34:28,910 INFO L87 Difference]: Start difference. First operand 1442 states and 3573 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:29,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:29,749 INFO L93 Difference]: Finished difference Result 2062 states and 4783 transitions. [2022-03-15 16:34:29,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 16:34:29,749 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 16:34:29,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:29,752 INFO L225 Difference]: With dead ends: 2062 [2022-03-15 16:34:29,752 INFO L226 Difference]: Without dead ends: 2062 [2022-03-15 16:34:29,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1238, Invalid=3592, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 16:34:29,753 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 218 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:29,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 168 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:34:29,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2022-03-15 16:34:29,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1289. [2022-03-15 16:34:29,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 2.482919254658385) internal successors, (3198), 1288 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:29,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 3198 transitions. [2022-03-15 16:34:29,770 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 3198 transitions. Word has length 28 [2022-03-15 16:34:29,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:29,770 INFO L470 AbstractCegarLoop]: Abstraction has 1289 states and 3198 transitions. [2022-03-15 16:34:29,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:29,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 3198 transitions. [2022-03-15 16:34:29,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:34:29,772 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:29,772 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:29,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-15 16:34:29,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:29,975 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:29,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:29,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1901754846, now seen corresponding path program 55 times [2022-03-15 16:34:29,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:29,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752643956] [2022-03-15 16:34:29,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:29,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:30,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:30,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752643956] [2022-03-15 16:34:30,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752643956] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:30,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324869136] [2022-03-15 16:34:30,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:34:30,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:30,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:30,059 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) [2022-03-15 16:34:30,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-15 16:34:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:30,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:34:30,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:30,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:30,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324869136] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:30,343 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:30,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 16:34:30,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451096114] [2022-03-15 16:34:30,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:30,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:34:30,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:30,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:34:30,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:34:30,344 INFO L87 Difference]: Start difference. First operand 1289 states and 3198 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2022-03-15 16:34:31,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:31,186 INFO L93 Difference]: Finished difference Result 2310 states and 5344 transitions. [2022-03-15 16:34:31,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 16:34:31,187 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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 28 [2022-03-15 16:34:31,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:31,189 INFO L225 Difference]: With dead ends: 2310 [2022-03-15 16:34:31,189 INFO L226 Difference]: Without dead ends: 2239 [2022-03-15 16:34:31,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1147, Invalid=3275, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 16:34:31,190 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 416 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:31,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 177 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:34:31,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2022-03-15 16:34:31,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 1468. [2022-03-15 16:34:31,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 2.496932515337423) internal successors, (3663), 1467 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:31,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 3663 transitions. [2022-03-15 16:34:31,211 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 3663 transitions. Word has length 28 [2022-03-15 16:34:31,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:31,211 INFO L470 AbstractCegarLoop]: Abstraction has 1468 states and 3663 transitions. [2022-03-15 16:34:31,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2022-03-15 16:34:31,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 3663 transitions. [2022-03-15 16:34:31,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:34:31,213 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:31,213 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:31,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-15 16:34:31,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-15 16:34:31,414 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:31,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:31,414 INFO L85 PathProgramCache]: Analyzing trace with hash -2007391006, now seen corresponding path program 56 times [2022-03-15 16:34:31,414 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:31,414 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347000357] [2022-03-15 16:34:31,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:31,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:31,480 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:31,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347000357] [2022-03-15 16:34:31,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347000357] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:31,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927034453] [2022-03-15 16:34:31,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:34:31,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:31,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:31,482 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) [2022-03-15 16:34:31,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-15 16:34:31,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:34:31,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:31,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:34:31,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:31,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:31,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927034453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:31,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:31,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 25 [2022-03-15 16:34:31,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440883606] [2022-03-15 16:34:31,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:31,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:34:31,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:31,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:34:31,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:34:31,866 INFO L87 Difference]: Start difference. First operand 1468 states and 3663 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:32,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:32,959 INFO L93 Difference]: Finished difference Result 2686 states and 6345 transitions. [2022-03-15 16:34:32,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-15 16:34:32,960 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 16:34:32,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:32,963 INFO L225 Difference]: With dead ends: 2686 [2022-03-15 16:34:32,963 INFO L226 Difference]: Without dead ends: 2682 [2022-03-15 16:34:32,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2421 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1964, Invalid=5008, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 16:34:32,964 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 371 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:32,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 231 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:34:32,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2022-03-15 16:34:32,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1786. [2022-03-15 16:34:32,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 2.5126050420168067) internal successors, (4485), 1785 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:32,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 4485 transitions. [2022-03-15 16:34:32,989 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 4485 transitions. Word has length 28 [2022-03-15 16:34:32,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:32,989 INFO L470 AbstractCegarLoop]: Abstraction has 1786 states and 4485 transitions. [2022-03-15 16:34:32,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:32,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 4485 transitions. [2022-03-15 16:34:32,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:34:32,991 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:32,991 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:33,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-15 16:34:33,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:33,192 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:33,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:33,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1955897502, now seen corresponding path program 57 times [2022-03-15 16:34:33,193 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:33,193 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565260345] [2022-03-15 16:34:33,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:33,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:33,256 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:33,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565260345] [2022-03-15 16:34:33,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565260345] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:33,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008492722] [2022-03-15 16:34:33,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:34:33,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:33,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:33,257 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) [2022-03-15 16:34:33,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-15 16:34:33,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 16:34:33,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:33,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:34:33,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:33,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:33,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008492722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:33,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:33,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-03-15 16:34:33,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711022879] [2022-03-15 16:34:33,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:33,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:34:33,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:33,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:34:33,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:34:33,601 INFO L87 Difference]: Start difference. First operand 1786 states and 4485 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) [2022-03-15 16:34:34,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:34,199 INFO L93 Difference]: Finished difference Result 2073 states and 5023 transitions. [2022-03-15 16:34:34,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:34:34,199 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 28 [2022-03-15 16:34:34,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:34,202 INFO L225 Difference]: With dead ends: 2073 [2022-03-15 16:34:34,202 INFO L226 Difference]: Without dead ends: 2069 [2022-03-15 16:34:34,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=981, Invalid=2441, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 16:34:34,203 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 172 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:34,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 97 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:34:34,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2022-03-15 16:34:34,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1761. [2022-03-15 16:34:34,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1760 states have (on average 2.513068181818182) internal successors, (4423), 1760 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:34,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 4423 transitions. [2022-03-15 16:34:34,224 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 4423 transitions. Word has length 28 [2022-03-15 16:34:34,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:34,224 INFO L470 AbstractCegarLoop]: Abstraction has 1761 states and 4423 transitions. [2022-03-15 16:34:34,224 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) [2022-03-15 16:34:34,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 4423 transitions. [2022-03-15 16:34:34,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:34:34,226 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:34,226 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:34,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-15 16:34:34,426 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,SelfDestructingSolverStorable61 [2022-03-15 16:34:34,426 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:34,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:34,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1571411288, now seen corresponding path program 58 times [2022-03-15 16:34:34,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:34,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088594337] [2022-03-15 16:34:34,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:34,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:34:34,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:34,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088594337] [2022-03-15 16:34:34,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088594337] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:34,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239803537] [2022-03-15 16:34:34,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:34:34,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:34,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:34,480 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) [2022-03-15 16:34:34,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-15 16:34:34,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:34:34,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:34,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:34:34,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:34,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:34,804 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:34,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239803537] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:34,804 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:34,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-03-15 16:34:34,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921636066] [2022-03-15 16:34:34,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:34,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:34:34,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:34,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:34:34,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:34:34,805 INFO L87 Difference]: Start difference. First operand 1761 states and 4423 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:35,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:35,455 INFO L93 Difference]: Finished difference Result 2379 states and 5765 transitions. [2022-03-15 16:34:35,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 16:34:35,455 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 16:34:35,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:35,458 INFO L225 Difference]: With dead ends: 2379 [2022-03-15 16:34:35,458 INFO L226 Difference]: Without dead ends: 2367 [2022-03-15 16:34:35,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=882, Invalid=2310, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:34:35,459 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 272 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:35,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 101 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:34:35,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2022-03-15 16:34:35,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 1864. [2022-03-15 16:34:35,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1863 states have (on average 2.526033279656468) internal successors, (4706), 1863 states have internal predecessors, (4706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:35,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 4706 transitions. [2022-03-15 16:34:35,485 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 4706 transitions. Word has length 28 [2022-03-15 16:34:35,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:35,486 INFO L470 AbstractCegarLoop]: Abstraction has 1864 states and 4706 transitions. [2022-03-15 16:34:35,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:35,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 4706 transitions. [2022-03-15 16:34:35,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:34:35,488 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:35,488 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:35,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-15 16:34:35,697 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,SelfDestructingSolverStorable62 [2022-03-15 16:34:35,698 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:35,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:35,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1126878266, now seen corresponding path program 59 times [2022-03-15 16:34:35,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:35,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055485648] [2022-03-15 16:34:35,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:35,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:35,752 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:35,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055485648] [2022-03-15 16:34:35,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055485648] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:35,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698521275] [2022-03-15 16:34:35,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:34:35,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:35,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:35,754 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) [2022-03-15 16:34:35,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-15 16:34:35,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 16:34:35,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:35,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:34:35,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:35,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:36,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698521275] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:36,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:36,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-03-15 16:34:36,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945431479] [2022-03-15 16:34:36,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:36,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:34:36,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:36,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:34:36,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:34:36,087 INFO L87 Difference]: Start difference. First operand 1864 states and 4706 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) [2022-03-15 16:34:36,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:36,740 INFO L93 Difference]: Finished difference Result 2488 states and 5987 transitions. [2022-03-15 16:34:36,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:34:36,740 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 28 [2022-03-15 16:34:36,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:36,744 INFO L225 Difference]: With dead ends: 2488 [2022-03-15 16:34:36,744 INFO L226 Difference]: Without dead ends: 2474 [2022-03-15 16:34:36,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=986, Invalid=2554, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 16:34:36,744 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 202 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:36,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 141 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:34:36,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2022-03-15 16:34:36,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1917. [2022-03-15 16:34:36,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1916 states have (on average 2.5328810020876826) internal successors, (4853), 1916 states have internal predecessors, (4853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:36,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 4853 transitions. [2022-03-15 16:34:36,771 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 4853 transitions. Word has length 28 [2022-03-15 16:34:36,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:36,771 INFO L470 AbstractCegarLoop]: Abstraction has 1917 states and 4853 transitions. [2022-03-15 16:34:36,771 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) [2022-03-15 16:34:36,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 4853 transitions. [2022-03-15 16:34:36,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:34:36,773 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:36,774 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:36,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-15 16:34:36,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:36,989 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:36,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:36,989 INFO L85 PathProgramCache]: Analyzing trace with hash 681233606, now seen corresponding path program 60 times [2022-03-15 16:34:36,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:36,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423208091] [2022-03-15 16:34:36,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:36,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:37,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:37,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423208091] [2022-03-15 16:34:37,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423208091] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:37,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148660761] [2022-03-15 16:34:37,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:34:37,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:37,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:37,055 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) [2022-03-15 16:34:37,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-15 16:34:37,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 16:34:37,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:37,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:34:37,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:37,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:37,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148660761] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:37,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:37,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-03-15 16:34:37,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72552799] [2022-03-15 16:34:37,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:37,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:34:37,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:37,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:34:37,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:34:37,349 INFO L87 Difference]: Start difference. First operand 1917 states and 4853 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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) [2022-03-15 16:34:37,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:37,992 INFO L93 Difference]: Finished difference Result 2707 states and 6510 transitions. [2022-03-15 16:34:37,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:34:37,992 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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 28 [2022-03-15 16:34:37,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:38,014 INFO L225 Difference]: With dead ends: 2707 [2022-03-15 16:34:38,015 INFO L226 Difference]: Without dead ends: 2685 [2022-03-15 16:34:38,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=999, Invalid=2661, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:34:38,015 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 263 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:38,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 136 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:34:38,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2022-03-15 16:34:38,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 1814. [2022-03-15 16:34:38,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 2.518477661334804) internal successors, (4566), 1813 states have internal predecessors, (4566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:38,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 4566 transitions. [2022-03-15 16:34:38,042 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 4566 transitions. Word has length 28 [2022-03-15 16:34:38,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:38,042 INFO L470 AbstractCegarLoop]: Abstraction has 1814 states and 4566 transitions. [2022-03-15 16:34:38,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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) [2022-03-15 16:34:38,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 4566 transitions. [2022-03-15 16:34:38,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:34:38,044 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:38,044 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:38,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-15 16:34:38,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:38,244 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:38,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:38,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1834776692, now seen corresponding path program 61 times [2022-03-15 16:34:38,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:38,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990870131] [2022-03-15 16:34:38,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:38,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:38,330 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:34:38,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:38,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990870131] [2022-03-15 16:34:38,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990870131] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:38,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016716111] [2022-03-15 16:34:38,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:34:38,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:38,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:38,334 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) [2022-03-15 16:34:38,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-15 16:34:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:38,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:34:38,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:38,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:38,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016716111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:38,655 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:38,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 16:34:38,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70387606] [2022-03-15 16:34:38,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:38,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:34:38,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:38,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:34:38,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:34:38,656 INFO L87 Difference]: Start difference. First operand 1814 states and 4566 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 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) [2022-03-15 16:34:39,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:39,595 INFO L93 Difference]: Finished difference Result 2769 states and 6415 transitions. [2022-03-15 16:34:39,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 16:34:39,596 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 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 28 [2022-03-15 16:34:39,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:39,599 INFO L225 Difference]: With dead ends: 2769 [2022-03-15 16:34:39,599 INFO L226 Difference]: Without dead ends: 2769 [2022-03-15 16:34:39,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1438, Invalid=3964, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 16:34:39,599 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 348 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:39,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 231 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:34:39,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2022-03-15 16:34:39,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 1600. [2022-03-15 16:34:39,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 2.4809255784865543) internal successors, (3967), 1599 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:39,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 3967 transitions. [2022-03-15 16:34:39,624 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 3967 transitions. Word has length 28 [2022-03-15 16:34:39,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:39,624 INFO L470 AbstractCegarLoop]: Abstraction has 1600 states and 3967 transitions. [2022-03-15 16:34:39,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 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) [2022-03-15 16:34:39,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 3967 transitions. [2022-03-15 16:34:39,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:34:39,626 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:39,626 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:39,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-15 16:34:39,827 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,SelfDestructingSolverStorable65 [2022-03-15 16:34:39,827 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:39,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:39,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1049648184, now seen corresponding path program 62 times [2022-03-15 16:34:39,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:39,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691694678] [2022-03-15 16:34:39,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:39,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:34:39,894 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:39,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691694678] [2022-03-15 16:34:39,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691694678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:39,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665328313] [2022-03-15 16:34:39,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:34:39,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:39,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:39,896 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) [2022-03-15 16:34:39,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-15 16:34:39,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:34:39,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:39,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:34:39,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:40,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:40,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665328313] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:40,217 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:40,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-03-15 16:34:40,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469194049] [2022-03-15 16:34:40,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:40,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:34:40,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:40,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:34:40,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:34:40,218 INFO L87 Difference]: Start difference. First operand 1600 states and 3967 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:40,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:40,834 INFO L93 Difference]: Finished difference Result 2024 states and 4735 transitions. [2022-03-15 16:34:40,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 16:34:40,834 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 16:34:40,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:40,836 INFO L225 Difference]: With dead ends: 2024 [2022-03-15 16:34:40,836 INFO L226 Difference]: Without dead ends: 1985 [2022-03-15 16:34:40,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=2372, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:34:40,837 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 234 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:40,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 181 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:34:40,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2022-03-15 16:34:40,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1546. [2022-03-15 16:34:40,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1545 states have (on average 2.4679611650485436) internal successors, (3813), 1545 states have internal predecessors, (3813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:40,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 3813 transitions. [2022-03-15 16:34:40,863 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 3813 transitions. Word has length 28 [2022-03-15 16:34:40,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:40,863 INFO L470 AbstractCegarLoop]: Abstraction has 1546 states and 3813 transitions. [2022-03-15 16:34:40,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:40,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 3813 transitions. [2022-03-15 16:34:40,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:34:40,865 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:40,865 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:40,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-15 16:34:41,065 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,SelfDestructingSolverStorable66 [2022-03-15 16:34:41,066 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:41,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:41,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1729324172, now seen corresponding path program 63 times [2022-03-15 16:34:41,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:41,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28281522] [2022-03-15 16:34:41,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:41,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:34:41,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:41,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28281522] [2022-03-15 16:34:41,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28281522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:41,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932646927] [2022-03-15 16:34:41,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:34:41,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:41,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:41,148 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) [2022-03-15 16:34:41,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-15 16:34:41,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:34:41,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:41,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:34:41,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:41,335 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:41,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:41,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932646927] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:41,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:41,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-03-15 16:34:41,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159008345] [2022-03-15 16:34:41,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:41,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:34:41,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:41,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:34:41,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:34:41,468 INFO L87 Difference]: Start difference. First operand 1546 states and 3813 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-15 16:34:42,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:42,575 INFO L93 Difference]: Finished difference Result 2758 states and 6361 transitions. [2022-03-15 16:34:42,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-15 16:34:42,575 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 28 [2022-03-15 16:34:42,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:42,578 INFO L225 Difference]: With dead ends: 2758 [2022-03-15 16:34:42,578 INFO L226 Difference]: Without dead ends: 2758 [2022-03-15 16:34:42,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1855, Invalid=4625, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 16:34:42,579 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 336 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:42,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 255 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:34:42,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2758 states. [2022-03-15 16:34:42,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2758 to 1630. [2022-03-15 16:34:42,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 2.4487415592387967) internal successors, (3989), 1629 states have internal predecessors, (3989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:42,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 3989 transitions. [2022-03-15 16:34:42,605 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 3989 transitions. Word has length 28 [2022-03-15 16:34:42,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:42,605 INFO L470 AbstractCegarLoop]: Abstraction has 1630 states and 3989 transitions. [2022-03-15 16:34:42,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-15 16:34:42,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 3989 transitions. [2022-03-15 16:34:42,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:34:42,607 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:42,607 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:42,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-15 16:34:42,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:42,809 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:42,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:42,810 INFO L85 PathProgramCache]: Analyzing trace with hash -819162124, now seen corresponding path program 64 times [2022-03-15 16:34:42,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:42,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878734334] [2022-03-15 16:34:42,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:42,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:34:42,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:42,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878734334] [2022-03-15 16:34:42,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878734334] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:42,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065327991] [2022-03-15 16:34:42,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:34:42,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:42,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:42,869 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:34:42,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-15 16:34:42,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:34:42,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:42,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:34:42,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:43,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:43,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065327991] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:43,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:43,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-03-15 16:34:43,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934431389] [2022-03-15 16:34:43,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:43,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:34:43,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:43,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:34:43,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:34:43,177 INFO L87 Difference]: Start difference. First operand 1630 states and 3989 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:43,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:43,729 INFO L93 Difference]: Finished difference Result 1964 states and 4612 transitions. [2022-03-15 16:34:43,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:34:43,729 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:34:43,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:43,732 INFO L225 Difference]: With dead ends: 1964 [2022-03-15 16:34:43,732 INFO L226 Difference]: Without dead ends: 1946 [2022-03-15 16:34:43,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=758, Invalid=2104, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:34:43,733 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 214 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:43,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 122 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:34:43,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2022-03-15 16:34:43,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1629. [2022-03-15 16:34:43,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 2.447788697788698) internal successors, (3985), 1628 states have internal predecessors, (3985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:43,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 3985 transitions. [2022-03-15 16:34:43,753 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 3985 transitions. Word has length 28 [2022-03-15 16:34:43,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:43,753 INFO L470 AbstractCegarLoop]: Abstraction has 1629 states and 3985 transitions. [2022-03-15 16:34:43,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:43,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 3985 transitions. [2022-03-15 16:34:43,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:34:43,755 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:43,755 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:43,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-15 16:34:43,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-15 16:34:43,959 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:43,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:43,960 INFO L85 PathProgramCache]: Analyzing trace with hash 617050672, now seen corresponding path program 65 times [2022-03-15 16:34:43,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:43,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828162715] [2022-03-15 16:34:43,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:43,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:34:44,034 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:44,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828162715] [2022-03-15 16:34:44,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828162715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:44,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163100266] [2022-03-15 16:34:44,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:34:44,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:44,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:44,036 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:34:44,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-15 16:34:44,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:34:44,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:44,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:34:44,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:44,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:44,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163100266] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:44,372 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:44,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 25 [2022-03-15 16:34:44,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719996934] [2022-03-15 16:34:44,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:44,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:34:44,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:44,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:34:44,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:34:44,373 INFO L87 Difference]: Start difference. First operand 1629 states and 3985 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 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) [2022-03-15 16:34:45,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:45,639 INFO L93 Difference]: Finished difference Result 3359 states and 7975 transitions. [2022-03-15 16:34:45,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-15 16:34:45,639 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 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 28 [2022-03-15 16:34:45,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:45,643 INFO L225 Difference]: With dead ends: 3359 [2022-03-15 16:34:45,643 INFO L226 Difference]: Without dead ends: 3359 [2022-03-15 16:34:45,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3415 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2555, Invalid=6187, Unknown=0, NotChecked=0, Total=8742 [2022-03-15 16:34:45,644 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 350 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:45,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 214 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:34:45,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3359 states. [2022-03-15 16:34:45,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3359 to 2498. [2022-03-15 16:34:45,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 2497 states have (on average 2.528233880656788) internal successors, (6313), 2497 states have internal predecessors, (6313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:45,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 6313 transitions. [2022-03-15 16:34:45,682 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 6313 transitions. Word has length 28 [2022-03-15 16:34:45,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:45,682 INFO L470 AbstractCegarLoop]: Abstraction has 2498 states and 6313 transitions. [2022-03-15 16:34:45,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 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) [2022-03-15 16:34:45,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 6313 transitions. [2022-03-15 16:34:45,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:34:45,685 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:45,685 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:45,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-15 16:34:45,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-15 16:34:45,885 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:45,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:45,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1135030552, now seen corresponding path program 66 times [2022-03-15 16:34:45,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:45,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310305278] [2022-03-15 16:34:45,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:45,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:34:45,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:45,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310305278] [2022-03-15 16:34:45,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310305278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:45,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135348133] [2022-03-15 16:34:45,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:34:45,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:45,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:45,946 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:34:45,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-15 16:34:45,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:34:45,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:45,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:34:45,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:46,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:46,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135348133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:46,273 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:46,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-03-15 16:34:46,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654470514] [2022-03-15 16:34:46,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:46,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:34:46,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:46,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:34:46,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:34:46,274 INFO L87 Difference]: Start difference. First operand 2498 states and 6313 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) [2022-03-15 16:34:47,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:47,131 INFO L93 Difference]: Finished difference Result 3045 states and 7377 transitions. [2022-03-15 16:34:47,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:34:47,132 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 28 [2022-03-15 16:34:47,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:47,135 INFO L225 Difference]: With dead ends: 3045 [2022-03-15 16:34:47,136 INFO L226 Difference]: Without dead ends: 3041 [2022-03-15 16:34:47,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1432, Invalid=3538, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 16:34:47,136 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 341 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:47,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 86 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:34:47,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2022-03-15 16:34:47,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 2472. [2022-03-15 16:34:47,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.525698097936058) internal successors, (6241), 2471 states have internal predecessors, (6241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:47,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 6241 transitions. [2022-03-15 16:34:47,172 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 6241 transitions. Word has length 28 [2022-03-15 16:34:47,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:47,172 INFO L470 AbstractCegarLoop]: Abstraction has 2472 states and 6241 transitions. [2022-03-15 16:34:47,172 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) [2022-03-15 16:34:47,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 6241 transitions. [2022-03-15 16:34:47,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:34:47,175 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:47,175 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:47,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-15 16:34:47,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:47,376 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:47,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:47,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1641376818, now seen corresponding path program 67 times [2022-03-15 16:34:47,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:47,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551531740] [2022-03-15 16:34:47,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:47,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:34:47,439 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:47,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551531740] [2022-03-15 16:34:47,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551531740] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:47,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184459367] [2022-03-15 16:34:47,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:34:47,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:47,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:47,440 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:34:47,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-15 16:34:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:47,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:34:47,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:47,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:47,753 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:47,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184459367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:47,753 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:47,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-03-15 16:34:47,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690893830] [2022-03-15 16:34:47,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:47,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:34:47,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:47,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:34:47,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:34:47,754 INFO L87 Difference]: Start difference. First operand 2472 states and 6241 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) [2022-03-15 16:34:48,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:48,540 INFO L93 Difference]: Finished difference Result 3267 states and 7923 transitions. [2022-03-15 16:34:48,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 16:34:48,541 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 28 [2022-03-15 16:34:48,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:48,545 INFO L225 Difference]: With dead ends: 3267 [2022-03-15 16:34:48,545 INFO L226 Difference]: Without dead ends: 3255 [2022-03-15 16:34:48,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1250, Invalid=3172, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 16:34:48,546 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 311 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:48,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 95 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:34:48,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2022-03-15 16:34:48,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2666. [2022-03-15 16:34:48,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.5395872420262666) internal successors, (6768), 2665 states have internal predecessors, (6768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:48,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 6768 transitions. [2022-03-15 16:34:48,584 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 6768 transitions. Word has length 28 [2022-03-15 16:34:48,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:48,584 INFO L470 AbstractCegarLoop]: Abstraction has 2666 states and 6768 transitions. [2022-03-15 16:34:48,584 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) [2022-03-15 16:34:48,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 6768 transitions. [2022-03-15 16:34:48,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:34:48,587 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:48,587 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:48,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-15 16:34:48,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-03-15 16:34:48,787 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:48,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:48,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1868598198, now seen corresponding path program 68 times [2022-03-15 16:34:48,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:48,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578511704] [2022-03-15 16:34:48,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:48,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:34:48,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:48,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578511704] [2022-03-15 16:34:48,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578511704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:48,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451919317] [2022-03-15 16:34:48,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:34:48,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:48,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:48,857 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:34:48,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-15 16:34:48,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:34:48,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:48,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:34:48,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:49,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:49,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451919317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:49,170 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:49,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-03-15 16:34:49,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336919064] [2022-03-15 16:34:49,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:49,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:34:49,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:49,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:34:49,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:34:49,171 INFO L87 Difference]: Start difference. First operand 2666 states and 6768 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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) [2022-03-15 16:34:49,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:49,950 INFO L93 Difference]: Finished difference Result 3608 states and 8768 transitions. [2022-03-15 16:34:49,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:34:49,950 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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 28 [2022-03-15 16:34:49,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:49,954 INFO L225 Difference]: With dead ends: 3608 [2022-03-15 16:34:49,955 INFO L226 Difference]: Without dead ends: 3588 [2022-03-15 16:34:49,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1194, Invalid=3096, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 16:34:49,955 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 305 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:49,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 121 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:34:49,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3588 states. [2022-03-15 16:34:49,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3588 to 2939. [2022-03-15 16:34:49,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2939 states, 2938 states have (on average 2.5517358747447245) internal successors, (7497), 2938 states have internal predecessors, (7497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:49,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 7497 transitions. [2022-03-15 16:34:49,997 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 7497 transitions. Word has length 28 [2022-03-15 16:34:49,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:49,997 INFO L470 AbstractCegarLoop]: Abstraction has 2939 states and 7497 transitions. [2022-03-15 16:34:49,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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) [2022-03-15 16:34:49,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 7497 transitions. [2022-03-15 16:34:50,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:34:50,000 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:50,000 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:50,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-15 16:34:50,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:50,201 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:50,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:50,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1185012282, now seen corresponding path program 69 times [2022-03-15 16:34:50,201 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:50,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745256783] [2022-03-15 16:34:50,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:50,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:50,264 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:50,264 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:50,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745256783] [2022-03-15 16:34:50,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745256783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:50,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832305394] [2022-03-15 16:34:50,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:34:50,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:50,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:50,265 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:34:50,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-15 16:34:50,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:34:50,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:50,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:34:50,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:50,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:50,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832305394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:50,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:50,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 16:34:50,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938713806] [2022-03-15 16:34:50,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:50,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:34:50,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:50,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:34:50,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:34:50,544 INFO L87 Difference]: Start difference. First operand 2939 states and 7497 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:51,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:51,175 INFO L93 Difference]: Finished difference Result 3723 states and 9138 transitions. [2022-03-15 16:34:51,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:34:51,175 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 16:34:51,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:51,179 INFO L225 Difference]: With dead ends: 3723 [2022-03-15 16:34:51,179 INFO L226 Difference]: Without dead ends: 3695 [2022-03-15 16:34:51,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1020, Invalid=2762, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 16:34:51,180 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 342 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:51,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 97 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:34:51,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3695 states. [2022-03-15 16:34:51,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3695 to 3119. [2022-03-15 16:34:51,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3119 states, 3118 states have (on average 2.5593329057087875) internal successors, (7980), 3118 states have internal predecessors, (7980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:51,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3119 states to 3119 states and 7980 transitions. [2022-03-15 16:34:51,225 INFO L78 Accepts]: Start accepts. Automaton has 3119 states and 7980 transitions. Word has length 28 [2022-03-15 16:34:51,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:51,225 INFO L470 AbstractCegarLoop]: Abstraction has 3119 states and 7980 transitions. [2022-03-15 16:34:51,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:51,225 INFO L276 IsEmpty]: Start isEmpty. Operand 3119 states and 7980 transitions. [2022-03-15 16:34:51,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:34:51,229 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:51,229 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:51,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-15 16:34:51,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:51,430 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:51,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:51,430 INFO L85 PathProgramCache]: Analyzing trace with hash -114447712, now seen corresponding path program 70 times [2022-03-15 16:34:51,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:51,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505180206] [2022-03-15 16:34:51,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:51,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:51,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:51,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505180206] [2022-03-15 16:34:51,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505180206] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:51,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620424707] [2022-03-15 16:34:51,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:34:51,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:51,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:51,715 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:34:51,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-15 16:34:51,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:34:51,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:51,741 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:34:51,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:52,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:52,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:52,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:52,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:52,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:52,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:52,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:52,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:52,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:52,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:52,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:52,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:52,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:52,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:52,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:34:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:52,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:52,567 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:34:52,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:34:52,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:52,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:52,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:52,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:52,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:52,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:52,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:52,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:52,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:52,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:52,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:52,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:52,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:52,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:52,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:52,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:34:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:52,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620424707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:52,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:52,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-15 16:34:52,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624384348] [2022-03-15 16:34:52,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:52,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:34:52,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:52,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:34:52,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:34:52,925 INFO L87 Difference]: Start difference. First operand 3119 states and 7980 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:54,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:54,835 INFO L93 Difference]: Finished difference Result 4166 states and 10459 transitions. [2022-03-15 16:34:54,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 16:34:54,835 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:34:54,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:54,840 INFO L225 Difference]: With dead ends: 4166 [2022-03-15 16:34:54,840 INFO L226 Difference]: Without dead ends: 4159 [2022-03-15 16:34:54,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=574, Invalid=4976, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 16:34:54,841 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 135 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 296 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:54,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 228 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 660 Invalid, 0 Unknown, 296 Unchecked, 0.3s Time] [2022-03-15 16:34:54,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4159 states. [2022-03-15 16:34:54,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4159 to 3197. [2022-03-15 16:34:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3197 states, 3196 states have (on average 2.5528785982478097) internal successors, (8159), 3196 states have internal predecessors, (8159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:54,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 8159 transitions. [2022-03-15 16:34:54,882 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 8159 transitions. Word has length 30 [2022-03-15 16:34:54,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:54,882 INFO L470 AbstractCegarLoop]: Abstraction has 3197 states and 8159 transitions. [2022-03-15 16:34:54,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:54,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 8159 transitions. [2022-03-15 16:34:54,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:34:54,885 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:54,885 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:54,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-15 16:34:55,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:55,086 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:55,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:55,086 INFO L85 PathProgramCache]: Analyzing trace with hash 942240232, now seen corresponding path program 71 times [2022-03-15 16:34:55,086 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:55,086 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636161023] [2022-03-15 16:34:55,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:55,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:55,354 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:55,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:55,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636161023] [2022-03-15 16:34:55,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636161023] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:55,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363912494] [2022-03-15 16:34:55,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:34:55,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:55,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:55,355 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:34:55,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-15 16:34:55,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:34:55,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:55,376 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:34:55,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:55,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:55,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:55,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:55,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:55,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:55,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:55,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:55,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:55,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:55,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:55,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:55,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:55,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:55,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:34:55,825 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:55,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:34:56,209 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:34:56,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:34:56,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:56,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:56,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:56,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:56,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:56,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:56,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:56,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:56,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:56,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:56,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:56,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:56,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:56,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:56,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:56,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:34:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:56,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363912494] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:34:56,853 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:34:56,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-15 16:34:56,853 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981212382] [2022-03-15 16:34:56,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:34:56,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:34:56,853 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:34:56,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:34:56,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:34:56,853 INFO L87 Difference]: Start difference. First operand 3197 states and 8159 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:58,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:34:58,929 INFO L93 Difference]: Finished difference Result 4404 states and 11005 transitions. [2022-03-15 16:34:58,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 16:34:58,930 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:34:58,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:34:58,935 INFO L225 Difference]: With dead ends: 4404 [2022-03-15 16:34:58,935 INFO L226 Difference]: Without dead ends: 4401 [2022-03-15 16:34:58,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=642, Invalid=5210, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 16:34:58,936 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 167 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 417 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:34:58,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 210 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 599 Invalid, 0 Unknown, 417 Unchecked, 0.3s Time] [2022-03-15 16:34:58,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2022-03-15 16:34:58,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 3295. [2022-03-15 16:34:58,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 3294 states have (on average 2.546448087431694) internal successors, (8388), 3294 states have internal predecessors, (8388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:58,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 8388 transitions. [2022-03-15 16:34:58,982 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 8388 transitions. Word has length 30 [2022-03-15 16:34:58,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:34:58,983 INFO L470 AbstractCegarLoop]: Abstraction has 3295 states and 8388 transitions. [2022-03-15 16:34:58,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:34:58,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 8388 transitions. [2022-03-15 16:34:58,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:34:58,986 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:34:58,986 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:34:59,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-15 16:34:59,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-03-15 16:34:59,199 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:34:59,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:34:59,200 INFO L85 PathProgramCache]: Analyzing trace with hash -631993436, now seen corresponding path program 72 times [2022-03-15 16:34:59,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:34:59,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138169605] [2022-03-15 16:34:59,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:34:59,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:34:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:34:59,479 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:59,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:34:59,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138169605] [2022-03-15 16:34:59,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138169605] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:34:59,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438999122] [2022-03-15 16:34:59,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:34:59,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:34:59,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:34:59,481 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:34:59,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-15 16:34:59,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:34:59,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:34:59,503 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:34:59,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:34:59,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:59,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:59,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:59,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:59,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:59,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:59,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:59,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:59,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:59,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:59,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:59,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:59,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:59,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:34:59,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:34:59,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:34:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:34:59,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:00,314 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:35:00,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:35:00,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:00,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:00,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:00,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:00,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:00,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:00,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:00,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:00,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:00,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:00,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:00,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:00,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:00,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:00,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:00,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:35:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:00,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438999122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:00,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:00,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-15 16:35:00,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862687242] [2022-03-15 16:35:00,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:00,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:35:00,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:00,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:35:00,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:35:00,745 INFO L87 Difference]: Start difference. First operand 3295 states and 8388 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:02,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:02,547 INFO L93 Difference]: Finished difference Result 4374 states and 10904 transitions. [2022-03-15 16:35:02,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 16:35:02,548 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:35:02,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:02,553 INFO L225 Difference]: With dead ends: 4374 [2022-03-15 16:35:02,553 INFO L226 Difference]: Without dead ends: 4371 [2022-03-15 16:35:02,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=526, Invalid=4586, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 16:35:02,554 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 118 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:02,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 233 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 668 Invalid, 0 Unknown, 273 Unchecked, 0.3s Time] [2022-03-15 16:35:02,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2022-03-15 16:35:02,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3320. [2022-03-15 16:35:02,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3320 states, 3319 states have (on average 2.5432359144320578) internal successors, (8441), 3319 states have internal predecessors, (8441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:02,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3320 states to 3320 states and 8441 transitions. [2022-03-15 16:35:02,600 INFO L78 Accepts]: Start accepts. Automaton has 3320 states and 8441 transitions. Word has length 30 [2022-03-15 16:35:02,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:02,600 INFO L470 AbstractCegarLoop]: Abstraction has 3320 states and 8441 transitions. [2022-03-15 16:35:02,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:02,600 INFO L276 IsEmpty]: Start isEmpty. Operand 3320 states and 8441 transitions. [2022-03-15 16:35:02,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:35:02,603 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:02,603 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:02,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-15 16:35:02,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:02,804 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:35:02,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:02,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1642060192, now seen corresponding path program 73 times [2022-03-15 16:35:02,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:02,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382246119] [2022-03-15 16:35:02,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:02,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:03,082 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:03,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:03,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382246119] [2022-03-15 16:35:03,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382246119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:35:03,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651238050] [2022-03-15 16:35:03,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:35:03,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:03,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:03,083 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:35:03,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-15 16:35:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:03,104 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:35:03,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:35:03,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:03,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:03,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:03,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:03,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:03,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:03,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:03,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:03,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:03,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:03,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:03,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:03,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:35:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:03,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:03,926 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:35:03,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:35:04,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:04,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:04,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:04,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:04,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:04,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:04,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:04,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:04,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:04,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:04,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:04,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:04,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:04,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:04,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:04,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:35:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:04,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651238050] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:04,460 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:04,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-15 16:35:04,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377074764] [2022-03-15 16:35:04,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:04,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:35:04,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:04,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:35:04,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:35:04,461 INFO L87 Difference]: Start difference. First operand 3320 states and 8441 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:06,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:06,237 INFO L93 Difference]: Finished difference Result 4463 states and 11078 transitions. [2022-03-15 16:35:06,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 16:35:06,237 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:35:06,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:06,243 INFO L225 Difference]: With dead ends: 4463 [2022-03-15 16:35:06,243 INFO L226 Difference]: Without dead ends: 4460 [2022-03-15 16:35:06,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=536, Invalid=4576, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 16:35:06,244 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 144 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 502 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:06,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 224 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 611 Invalid, 0 Unknown, 502 Unchecked, 0.3s Time] [2022-03-15 16:35:06,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2022-03-15 16:35:06,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 3376. [2022-03-15 16:35:06,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3376 states, 3375 states have (on average 2.5374814814814814) internal successors, (8564), 3375 states have internal predecessors, (8564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:06,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3376 states to 3376 states and 8564 transitions. [2022-03-15 16:35:06,293 INFO L78 Accepts]: Start accepts. Automaton has 3376 states and 8564 transitions. Word has length 30 [2022-03-15 16:35:06,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:06,293 INFO L470 AbstractCegarLoop]: Abstraction has 3376 states and 8564 transitions. [2022-03-15 16:35:06,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:06,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3376 states and 8564 transitions. [2022-03-15 16:35:06,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:35:06,297 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:06,297 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:06,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-15 16:35:06,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:06,511 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:35:06,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:06,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1653603812, now seen corresponding path program 74 times [2022-03-15 16:35:06,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:06,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753399341] [2022-03-15 16:35:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:06,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:06,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:06,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753399341] [2022-03-15 16:35:06,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753399341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:35:06,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408022940] [2022-03-15 16:35:06,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:35:06,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:06,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:06,799 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:35:06,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-15 16:35:06,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:35:06,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:35:06,820 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:35:06,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:35:07,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:07,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:07,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:07,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:07,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:07,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:07,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:07,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:07,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:07,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:07,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:07,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:07,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:07,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:07,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:35:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:07,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:07,658 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:35:07,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:35:08,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:08,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:08,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:08,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:08,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:08,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:08,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:08,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:08,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:08,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:08,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:08,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:08,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:08,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:08,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:08,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:35:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:08,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408022940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:08,221 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:08,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-15 16:35:08,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236474391] [2022-03-15 16:35:08,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:08,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:35:08,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:08,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:35:08,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:35:08,222 INFO L87 Difference]: Start difference. First operand 3376 states and 8564 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:10,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:10,361 INFO L93 Difference]: Finished difference Result 4650 states and 11509 transitions. [2022-03-15 16:35:10,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-15 16:35:10,361 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:35:10,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:10,367 INFO L225 Difference]: With dead ends: 4650 [2022-03-15 16:35:10,367 INFO L226 Difference]: Without dead ends: 4647 [2022-03-15 16:35:10,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=667, Invalid=5653, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 16:35:10,368 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 132 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:10,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 224 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 639 Invalid, 0 Unknown, 234 Unchecked, 0.3s Time] [2022-03-15 16:35:10,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4647 states. [2022-03-15 16:35:10,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4647 to 3449. [2022-03-15 16:35:10,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 3448 states have (on average 2.5336426914153134) internal successors, (8736), 3448 states have internal predecessors, (8736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:10,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 8736 transitions. [2022-03-15 16:35:10,418 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 8736 transitions. Word has length 30 [2022-03-15 16:35:10,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:10,418 INFO L470 AbstractCegarLoop]: Abstraction has 3449 states and 8736 transitions. [2022-03-15 16:35:10,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:10,418 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 8736 transitions. [2022-03-15 16:35:10,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:35:10,422 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:10,422 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:10,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-15 16:35:10,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-15 16:35:10,622 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:35:10,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:10,622 INFO L85 PathProgramCache]: Analyzing trace with hash -822693660, now seen corresponding path program 75 times [2022-03-15 16:35:10,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:10,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225207134] [2022-03-15 16:35:10,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:10,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:10,928 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:10,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225207134] [2022-03-15 16:35:10,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225207134] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:35:10,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168754227] [2022-03-15 16:35:10,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:35:10,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:10,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:10,929 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:35:10,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-15 16:35:10,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:35:10,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:35:10,951 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 16:35:10,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:35:11,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:11,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:11,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:11,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:11,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:11,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:11,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:11,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:35:11,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 69 treesize of output 127 [2022-03-15 16:35:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:12,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:14,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:14,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:14,392 INFO L353 Elim1Store]: treesize reduction 44, result has 83.1 percent of original size [2022-03-15 16:35:14,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 73 treesize of output 242 [2022-03-15 16:35:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:55,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168754227] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:55,256 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:55,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-03-15 16:35:55,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867124315] [2022-03-15 16:35:55,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:55,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 16:35:55,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:55,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 16:35:55,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1399, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:35:55,257 INFO L87 Difference]: Start difference. First operand 3449 states and 8736 transitions. Second operand has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:57,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:35:57,446 INFO L93 Difference]: Finished difference Result 4822 states and 11870 transitions. [2022-03-15 16:35:57,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 16:35:57,446 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:35:57,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:35:57,452 INFO L225 Difference]: With dead ends: 4822 [2022-03-15 16:35:57,453 INFO L226 Difference]: Without dead ends: 4808 [2022-03-15 16:35:57,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=689, Invalid=5631, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 16:35:57,453 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 118 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1203 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:35:57,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 248 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 330 Invalid, 0 Unknown, 1203 Unchecked, 0.2s Time] [2022-03-15 16:35:57,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4808 states. [2022-03-15 16:35:57,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4808 to 3627. [2022-03-15 16:35:57,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 2.532542746828461) internal successors, (9183), 3626 states have internal predecessors, (9183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:57,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 9183 transitions. [2022-03-15 16:35:57,505 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 9183 transitions. Word has length 30 [2022-03-15 16:35:57,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:35:57,505 INFO L470 AbstractCegarLoop]: Abstraction has 3627 states and 9183 transitions. [2022-03-15 16:35:57,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:35:57,505 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 9183 transitions. [2022-03-15 16:35:57,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:35:57,509 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:35:57,509 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:35:57,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-15 16:35:57,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-15 16:35:57,709 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:35:57,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:35:57,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1881646240, now seen corresponding path program 76 times [2022-03-15 16:35:57,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:35:57,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521834106] [2022-03-15 16:35:57,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:35:57,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:35:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:35:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:58,000 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:35:58,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521834106] [2022-03-15 16:35:58,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521834106] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:35:58,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810018607] [2022-03-15 16:35:58,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:35:58,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:35:58,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:35:58,001 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:35:58,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-15 16:35:58,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:35:58,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:35:58,024 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:35:58,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:35:58,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:58,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:58,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:58,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:58,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:58,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:58,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:58,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:58,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:58,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:58,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:58,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:35:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:58,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:35:58,833 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:35:58,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:35:59,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:59,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:59,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:59,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:59,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:59,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:59,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:59,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:59,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:59,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:59,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:59,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:59,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:35:59,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:59,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:35:59,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:35:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:35:59,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810018607] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:35:59,425 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:35:59,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-15 16:35:59,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43523131] [2022-03-15 16:35:59,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:35:59,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:35:59,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:35:59,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:35:59,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:35:59,425 INFO L87 Difference]: Start difference. First operand 3627 states and 9183 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:01,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:01,512 INFO L93 Difference]: Finished difference Result 5062 states and 12550 transitions. [2022-03-15 16:36:01,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 16:36:01,512 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:36:01,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:01,519 INFO L225 Difference]: With dead ends: 5062 [2022-03-15 16:36:01,520 INFO L226 Difference]: Without dead ends: 5055 [2022-03-15 16:36:01,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=640, Invalid=4910, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 16:36:01,520 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 176 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:01,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 184 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 662 Invalid, 0 Unknown, 394 Unchecked, 0.4s Time] [2022-03-15 16:36:01,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5055 states. [2022-03-15 16:36:01,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5055 to 3754. [2022-03-15 16:36:01,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3754 states, 3753 states have (on average 2.5329070077271516) internal successors, (9506), 3753 states have internal predecessors, (9506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:01,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3754 states to 3754 states and 9506 transitions. [2022-03-15 16:36:01,573 INFO L78 Accepts]: Start accepts. Automaton has 3754 states and 9506 transitions. Word has length 30 [2022-03-15 16:36:01,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:01,573 INFO L470 AbstractCegarLoop]: Abstraction has 3754 states and 9506 transitions. [2022-03-15 16:36:01,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:01,573 INFO L276 IsEmpty]: Start isEmpty. Operand 3754 states and 9506 transitions. [2022-03-15 16:36:01,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:36:01,577 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:01,577 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:01,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-15 16:36:01,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:01,777 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:36:01,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:01,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1784027364, now seen corresponding path program 77 times [2022-03-15 16:36:01,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:01,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289531303] [2022-03-15 16:36:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:01,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:02,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:02,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289531303] [2022-03-15 16:36:02,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289531303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:02,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373538175] [2022-03-15 16:36:02,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:36:02,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:02,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:02,098 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:02,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-15 16:36:02,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:36:02,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:02,119 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:36:02,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:02,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:02,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:02,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:02,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:02,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:02,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:02,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:02,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:02,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:02,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:02,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:02,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:02,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:02,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:36:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:02,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:02,928 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:36:02,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:36:03,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:03,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:03,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:03,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:03,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:03,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:03,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:03,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:03,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:03,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:03,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:03,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:03,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:03,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:03,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:03,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:36:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:03,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373538175] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:03,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:03,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-15 16:36:03,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917684782] [2022-03-15 16:36:03,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:03,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:36:03,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:03,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:36:03,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:36:03,288 INFO L87 Difference]: Start difference. First operand 3754 states and 9506 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:05,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:05,360 INFO L93 Difference]: Finished difference Result 4972 states and 12378 transitions. [2022-03-15 16:36:05,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 16:36:05,360 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:36:05,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:05,366 INFO L225 Difference]: With dead ends: 4972 [2022-03-15 16:36:05,366 INFO L226 Difference]: Without dead ends: 4965 [2022-03-15 16:36:05,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=633, Invalid=4769, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 16:36:05,367 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 153 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 455 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:05,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 161 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 772 Invalid, 0 Unknown, 455 Unchecked, 0.4s Time] [2022-03-15 16:36:05,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4965 states. [2022-03-15 16:36:05,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4965 to 3846. [2022-03-15 16:36:05,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3846 states, 3845 states have (on average 2.5362808842652798) internal successors, (9752), 3845 states have internal predecessors, (9752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:05,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3846 states to 3846 states and 9752 transitions. [2022-03-15 16:36:05,420 INFO L78 Accepts]: Start accepts. Automaton has 3846 states and 9752 transitions. Word has length 30 [2022-03-15 16:36:05,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:05,420 INFO L470 AbstractCegarLoop]: Abstraction has 3846 states and 9752 transitions. [2022-03-15 16:36:05,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:05,420 INFO L276 IsEmpty]: Start isEmpty. Operand 3846 states and 9752 transitions. [2022-03-15 16:36:05,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:36:05,424 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:05,424 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:05,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:05,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:05,626 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:36:05,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:05,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1502641948, now seen corresponding path program 78 times [2022-03-15 16:36:05,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:05,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138805727] [2022-03-15 16:36:05,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:05,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:05,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:05,928 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:05,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138805727] [2022-03-15 16:36:05,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138805727] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:05,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804577404] [2022-03-15 16:36:05,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:36:05,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:05,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:05,930 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:05,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-15 16:36:05,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:36:05,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:05,951 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:36:05,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:06,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:06,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:06,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:06,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:06,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:06,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:06,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:06,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:06,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:06,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:06,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:06,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:06,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:06,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:36:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:06,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:06,802 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:36:06,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:36:07,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:07,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:07,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:07,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:07,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:07,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:07,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:07,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:07,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:07,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:07,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:07,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:07,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:07,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:07,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:07,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:36:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:07,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804577404] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:07,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:07,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-15 16:36:07,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752994410] [2022-03-15 16:36:07,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:07,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:36:07,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:07,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:36:07,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:36:07,379 INFO L87 Difference]: Start difference. First operand 3846 states and 9752 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:09,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:09,334 INFO L93 Difference]: Finished difference Result 5284 states and 13165 transitions. [2022-03-15 16:36:09,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 16:36:09,335 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:36:09,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:09,341 INFO L225 Difference]: With dead ends: 5284 [2022-03-15 16:36:09,341 INFO L226 Difference]: Without dead ends: 5277 [2022-03-15 16:36:09,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=614, Invalid=4642, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 16:36:09,342 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 118 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 510 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:09,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 199 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 802 Invalid, 0 Unknown, 510 Unchecked, 0.4s Time] [2022-03-15 16:36:09,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5277 states. [2022-03-15 16:36:09,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5277 to 4055. [2022-03-15 16:36:09,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4055 states, 4054 states have (on average 2.5444005920078934) internal successors, (10315), 4054 states have internal predecessors, (10315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:09,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4055 states to 4055 states and 10315 transitions. [2022-03-15 16:36:09,412 INFO L78 Accepts]: Start accepts. Automaton has 4055 states and 10315 transitions. Word has length 30 [2022-03-15 16:36:09,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:09,413 INFO L470 AbstractCegarLoop]: Abstraction has 4055 states and 10315 transitions. [2022-03-15 16:36:09,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:09,413 INFO L276 IsEmpty]: Start isEmpty. Operand 4055 states and 10315 transitions. [2022-03-15 16:36:09,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:36:09,417 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:09,417 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:09,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:09,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-03-15 16:36:09,617 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:36:09,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:09,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1774381284, now seen corresponding path program 79 times [2022-03-15 16:36:09,618 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:09,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278125166] [2022-03-15 16:36:09,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:09,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:09,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:09,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278125166] [2022-03-15 16:36:09,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278125166] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:09,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040310865] [2022-03-15 16:36:09,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:36:09,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:09,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:09,897 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:09,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-15 16:36:09,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:09,917 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:36:09,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:10,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:10,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:10,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:10,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:10,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:10,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:10,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:10,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:10,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:10,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:10,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:10,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:10,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:10,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:36:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:10,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:10,786 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:36:10,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:36:11,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:11,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:11,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:11,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:11,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:11,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:11,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:11,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:11,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:11,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:11,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:11,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:11,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:11,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:11,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:11,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:36:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:11,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040310865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:11,277 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:11,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-15 16:36:11,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600815261] [2022-03-15 16:36:11,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:11,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:36:11,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:11,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:36:11,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:36:11,278 INFO L87 Difference]: Start difference. First operand 4055 states and 10315 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:12,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:12,940 INFO L93 Difference]: Finished difference Result 5287 states and 13244 transitions. [2022-03-15 16:36:12,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:36:12,940 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:36:12,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:12,947 INFO L225 Difference]: With dead ends: 5287 [2022-03-15 16:36:12,947 INFO L226 Difference]: Without dead ends: 5280 [2022-03-15 16:36:12,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=509, Invalid=4047, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 16:36:12,948 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 123 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:12,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 118 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 490 Invalid, 0 Unknown, 283 Unchecked, 0.3s Time] [2022-03-15 16:36:12,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2022-03-15 16:36:12,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 4097. [2022-03-15 16:36:12,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4097 states, 4096 states have (on average 2.5498046875) internal successors, (10444), 4096 states have internal predecessors, (10444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:13,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4097 states to 4097 states and 10444 transitions. [2022-03-15 16:36:13,002 INFO L78 Accepts]: Start accepts. Automaton has 4097 states and 10444 transitions. Word has length 30 [2022-03-15 16:36:13,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:13,002 INFO L470 AbstractCegarLoop]: Abstraction has 4097 states and 10444 transitions. [2022-03-15 16:36:13,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:13,002 INFO L276 IsEmpty]: Start isEmpty. Operand 4097 states and 10444 transitions. [2022-03-15 16:36:13,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:36:13,006 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:13,006 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:13,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:13,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:13,213 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:36:13,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:13,214 INFO L85 PathProgramCache]: Analyzing trace with hash -550984530, now seen corresponding path program 80 times [2022-03-15 16:36:13,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:13,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070511859] [2022-03-15 16:36:13,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:13,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:13,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:13,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070511859] [2022-03-15 16:36:13,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070511859] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:13,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391197957] [2022-03-15 16:36:13,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:36:13,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:13,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:13,509 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:13,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-15 16:36:13,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:36:13,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:13,529 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:36:13,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:13,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:13,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:13,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:13,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:13,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:13,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:13,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:13,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:13,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:13,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:13,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:13,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:13,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:13,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:13,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:36:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:13,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:14,330 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:36:14,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:36:14,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:14,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:14,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:14,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:14,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:14,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:14,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:14,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:14,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:14,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:14,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:14,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:14,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:14,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:14,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:14,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:36:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:14,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391197957] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:14,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:14,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-15 16:36:14,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103404009] [2022-03-15 16:36:14,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:14,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:36:14,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:14,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:36:14,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:36:14,750 INFO L87 Difference]: Start difference. First operand 4097 states and 10444 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:17,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:17,118 INFO L93 Difference]: Finished difference Result 5489 states and 13623 transitions. [2022-03-15 16:36:17,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 16:36:17,118 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:36:17,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:17,125 INFO L225 Difference]: With dead ends: 5489 [2022-03-15 16:36:17,125 INFO L226 Difference]: Without dead ends: 5400 [2022-03-15 16:36:17,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=685, Invalid=5321, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 16:36:17,126 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 206 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:17,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 374 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1062 Invalid, 0 Unknown, 311 Unchecked, 0.5s Time] [2022-03-15 16:36:17,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2022-03-15 16:36:17,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 4287. [2022-03-15 16:36:17,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4287 states, 4286 states have (on average 2.536164255716286) internal successors, (10870), 4286 states have internal predecessors, (10870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:17,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4287 states to 4287 states and 10870 transitions. [2022-03-15 16:36:17,187 INFO L78 Accepts]: Start accepts. Automaton has 4287 states and 10870 transitions. Word has length 30 [2022-03-15 16:36:17,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:17,187 INFO L470 AbstractCegarLoop]: Abstraction has 4287 states and 10870 transitions. [2022-03-15 16:36:17,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:17,188 INFO L276 IsEmpty]: Start isEmpty. Operand 4287 states and 10870 transitions. [2022-03-15 16:36:17,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:36:17,192 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:17,192 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:17,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:17,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:17,392 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:36:17,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:17,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1068530254, now seen corresponding path program 81 times [2022-03-15 16:36:17,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:17,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644138751] [2022-03-15 16:36:17,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:17,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:17,676 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:17,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644138751] [2022-03-15 16:36:17,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644138751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:17,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122224405] [2022-03-15 16:36:17,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:36:17,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:17,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:17,678 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:17,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-15 16:36:17,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:36:17,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:17,703 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 16:36:17,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:18,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:18,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:18,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:18,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:18,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:18,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:18,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:18,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:36:18,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 69 treesize of output 127 [2022-03-15 16:36:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:18,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:20,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:20,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:20,421 INFO L353 Elim1Store]: treesize reduction 44, result has 83.1 percent of original size [2022-03-15 16:36:20,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 73 treesize of output 242 [2022-03-15 16:36:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:53,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122224405] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:53,319 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:53,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-03-15 16:36:53,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597845572] [2022-03-15 16:36:53,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:53,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 16:36:53,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:53,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 16:36:53,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1400, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:36:53,320 INFO L87 Difference]: Start difference. First operand 4287 states and 10870 transitions. Second operand has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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) [2022-03-15 16:36:55,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:55,367 INFO L93 Difference]: Finished difference Result 5896 states and 14560 transitions. [2022-03-15 16:36:55,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:36:55,367 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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 30 [2022-03-15 16:36:55,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:55,373 INFO L225 Difference]: With dead ends: 5896 [2022-03-15 16:36:55,374 INFO L226 Difference]: Without dead ends: 5880 [2022-03-15 16:36:55,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 37 SyntacticMatches, 12 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=566, Invalid=4690, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 16:36:55,374 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 142 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 485 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:55,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 168 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 314 Invalid, 0 Unknown, 485 Unchecked, 0.2s Time] [2022-03-15 16:36:55,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5880 states. [2022-03-15 16:36:55,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5880 to 4291. [2022-03-15 16:36:55,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4291 states, 4290 states have (on average 2.5356643356643356) internal successors, (10878), 4290 states have internal predecessors, (10878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:55,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4291 states to 4291 states and 10878 transitions. [2022-03-15 16:36:55,435 INFO L78 Accepts]: Start accepts. Automaton has 4291 states and 10878 transitions. Word has length 30 [2022-03-15 16:36:55,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:55,435 INFO L470 AbstractCegarLoop]: Abstraction has 4291 states and 10878 transitions. [2022-03-15 16:36:55,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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) [2022-03-15 16:36:55,435 INFO L276 IsEmpty]: Start isEmpty. Operand 4291 states and 10878 transitions. [2022-03-15 16:36:55,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:36:55,440 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:55,440 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:55,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:55,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-03-15 16:36:55,649 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:36:55,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:55,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2127482834, now seen corresponding path program 82 times [2022-03-15 16:36:55,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:55,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701692892] [2022-03-15 16:36:55,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:55,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:55,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:55,957 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:55,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:55,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701692892] [2022-03-15 16:36:55,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701692892] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:55,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655457287] [2022-03-15 16:36:55,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:36:55,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:55,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:55,964 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:55,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-15 16:36:55,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:36:55,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:55,989 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:36:55,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:56,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:56,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:56,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:56,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:56,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:56,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:56,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:56,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:56,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:56,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:56,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:56,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:56,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:56,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:36:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:56,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:56,814 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:36:56,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:36:57,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:57,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:57,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:57,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:57,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:57,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:57,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:57,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:57,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:57,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:57,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:57,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:57,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:57,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:57,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:57,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:36:57,185 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:57,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655457287] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:57,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:57,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-15 16:36:57,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323087095] [2022-03-15 16:36:57,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:57,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:36:57,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:57,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:36:57,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:36:57,186 INFO L87 Difference]: Start difference. First operand 4291 states and 10878 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:59,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:59,755 INFO L93 Difference]: Finished difference Result 5552 states and 13751 transitions. [2022-03-15 16:36:59,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 16:36:59,756 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:36:59,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:59,762 INFO L225 Difference]: With dead ends: 5552 [2022-03-15 16:36:59,763 INFO L226 Difference]: Without dead ends: 5453 [2022-03-15 16:36:59,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=714, Invalid=5448, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 16:36:59,763 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 191 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 550 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:59,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 378 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1213 Invalid, 0 Unknown, 550 Unchecked, 0.6s Time] [2022-03-15 16:36:59,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5453 states. [2022-03-15 16:36:59,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5453 to 4263. [2022-03-15 16:36:59,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4263 states, 4262 states have (on average 2.538479587048334) internal successors, (10819), 4262 states have internal predecessors, (10819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:59,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4263 states to 4263 states and 10819 transitions. [2022-03-15 16:36:59,825 INFO L78 Accepts]: Start accepts. Automaton has 4263 states and 10819 transitions. Word has length 30 [2022-03-15 16:36:59,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:59,825 INFO L470 AbstractCegarLoop]: Abstraction has 4263 states and 10819 transitions. [2022-03-15 16:36:59,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:59,825 INFO L276 IsEmpty]: Start isEmpty. Operand 4263 states and 10819 transitions. [2022-03-15 16:36:59,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:36:59,830 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:59,830 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:59,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-15 16:37:00,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:00,042 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:37:00,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:00,042 INFO L85 PathProgramCache]: Analyzing trace with hash 938367594, now seen corresponding path program 83 times [2022-03-15 16:37:00,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:00,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638750396] [2022-03-15 16:37:00,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:00,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:00,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:00,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638750396] [2022-03-15 16:37:00,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638750396] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:00,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035007985] [2022-03-15 16:37:00,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:37:00,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:00,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:00,341 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:00,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-15 16:37:00,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:37:00,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:00,369 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:37:00,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:00,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:00,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:00,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:00,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:00,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:00,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:00,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:00,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:00,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:00,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:00,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:00,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:37:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:00,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:01,187 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:37:01,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:37:01,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:01,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:01,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:01,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:01,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:01,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:01,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:01,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:01,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:01,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:01,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:01,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:01,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:01,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:01,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:01,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:37:01,650 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:01,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035007985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:01,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:01,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-15 16:37:01,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259810317] [2022-03-15 16:37:01,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:01,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:37:01,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:01,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:37:01,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:37:01,651 INFO L87 Difference]: Start difference. First operand 4263 states and 10819 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:04,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:04,124 INFO L93 Difference]: Finished difference Result 5582 states and 13851 transitions. [2022-03-15 16:37:04,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 16:37:04,124 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:37:04,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:04,131 INFO L225 Difference]: With dead ends: 5582 [2022-03-15 16:37:04,131 INFO L226 Difference]: Without dead ends: 5513 [2022-03-15 16:37:04,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=748, Invalid=5104, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 16:37:04,132 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 243 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:04,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 301 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1168 Invalid, 0 Unknown, 314 Unchecked, 0.6s Time] [2022-03-15 16:37:04,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5513 states. [2022-03-15 16:37:04,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5513 to 4407. [2022-03-15 16:37:04,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4407 states, 4406 states have (on average 2.5304130730821606) internal successors, (11149), 4406 states have internal predecessors, (11149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:04,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4407 states to 4407 states and 11149 transitions. [2022-03-15 16:37:04,190 INFO L78 Accepts]: Start accepts. Automaton has 4407 states and 11149 transitions. Word has length 30 [2022-03-15 16:37:04,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:04,190 INFO L470 AbstractCegarLoop]: Abstraction has 4407 states and 11149 transitions. [2022-03-15 16:37:04,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:04,190 INFO L276 IsEmpty]: Start isEmpty. Operand 4407 states and 11149 transitions. [2022-03-15 16:37:04,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:37:04,195 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:04,195 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:04,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:04,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:04,396 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:37:04,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:04,396 INFO L85 PathProgramCache]: Analyzing trace with hash 420821870, now seen corresponding path program 84 times [2022-03-15 16:37:04,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:04,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761056244] [2022-03-15 16:37:04,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:04,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:04,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:04,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761056244] [2022-03-15 16:37:04,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761056244] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:04,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485996842] [2022-03-15 16:37:04,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:37:04,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:04,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:04,716 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:04,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-15 16:37:04,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:37:04,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:04,738 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:37:04,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:05,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:05,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:05,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:05,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:05,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:05,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:05,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:05,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:05,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:05,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:05,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:05,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:05,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:05,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:37:05,159 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:05,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:05,551 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:37:05,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:37:05,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:05,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:05,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:05,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:05,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:05,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:05,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:05,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:05,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:05,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:05,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:05,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:05,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:05,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:05,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:05,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:37:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:05,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485996842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:05,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:05,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-15 16:37:05,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270659418] [2022-03-15 16:37:05,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:05,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:37:05,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:05,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:37:05,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:37:05,945 INFO L87 Difference]: Start difference. First operand 4407 states and 11149 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:08,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:08,326 INFO L93 Difference]: Finished difference Result 5498 states and 13608 transitions. [2022-03-15 16:37:08,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:37:08,326 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:37:08,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:08,333 INFO L225 Difference]: With dead ends: 5498 [2022-03-15 16:37:08,334 INFO L226 Difference]: Without dead ends: 5475 [2022-03-15 16:37:08,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1405 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=727, Invalid=4823, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 16:37:08,334 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 199 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:08,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 195 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1171 Invalid, 0 Unknown, 281 Unchecked, 0.6s Time] [2022-03-15 16:37:08,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5475 states. [2022-03-15 16:37:08,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5475 to 4391. [2022-03-15 16:37:08,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4391 states, 4390 states have (on average 2.5300683371298405) internal successors, (11107), 4390 states have internal predecessors, (11107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:08,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4391 states to 4391 states and 11107 transitions. [2022-03-15 16:37:08,393 INFO L78 Accepts]: Start accepts. Automaton has 4391 states and 11107 transitions. Word has length 30 [2022-03-15 16:37:08,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:08,393 INFO L470 AbstractCegarLoop]: Abstraction has 4391 states and 11107 transitions. [2022-03-15 16:37:08,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:08,393 INFO L276 IsEmpty]: Start isEmpty. Operand 4391 states and 11107 transitions. [2022-03-15 16:37:08,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:37:08,398 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:08,398 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:08,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:08,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-03-15 16:37:08,612 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:37:08,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:08,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1854127390, now seen corresponding path program 85 times [2022-03-15 16:37:08,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:08,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835992163] [2022-03-15 16:37:08,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:08,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:08,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:08,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835992163] [2022-03-15 16:37:08,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835992163] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:08,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446443608] [2022-03-15 16:37:08,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:37:08,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:08,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:08,913 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:08,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-15 16:37:08,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:08,932 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:37:08,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:09,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:09,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:09,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:09,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:09,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:09,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:09,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:09,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:09,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:09,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:09,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:09,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:09,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:09,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:37:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:09,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:09,736 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:37:09,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:37:10,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:10,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:10,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:10,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:10,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:10,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:10,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:10,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:10,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:10,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:10,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:10,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:10,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:10,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:10,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:10,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:37:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:10,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446443608] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:10,350 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:10,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-15 16:37:10,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830186957] [2022-03-15 16:37:10,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:10,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:37:10,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:10,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:37:10,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:37:10,351 INFO L87 Difference]: Start difference. First operand 4391 states and 11107 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:13,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:13,335 INFO L93 Difference]: Finished difference Result 5992 states and 14766 transitions. [2022-03-15 16:37:13,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-15 16:37:13,336 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:37:13,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:13,344 INFO L225 Difference]: With dead ends: 5992 [2022-03-15 16:37:13,344 INFO L226 Difference]: Without dead ends: 5976 [2022-03-15 16:37:13,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1973 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=829, Invalid=6481, Unknown=0, NotChecked=0, Total=7310 [2022-03-15 16:37:13,345 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 237 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:13,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 302 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:37:13,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5976 states. [2022-03-15 16:37:13,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5976 to 4474. [2022-03-15 16:37:13,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4474 states, 4473 states have (on average 2.5309635591325734) internal successors, (11321), 4473 states have internal predecessors, (11321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:13,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 11321 transitions. [2022-03-15 16:37:13,409 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 11321 transitions. Word has length 30 [2022-03-15 16:37:13,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:13,409 INFO L470 AbstractCegarLoop]: Abstraction has 4474 states and 11321 transitions. [2022-03-15 16:37:13,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:13,409 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 11321 transitions. [2022-03-15 16:37:13,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:37:13,414 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:13,414 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:13,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:13,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:13,614 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:37:13,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:13,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1499462230, now seen corresponding path program 86 times [2022-03-15 16:37:13,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:13,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524808568] [2022-03-15 16:37:13,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:13,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:37:13,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:13,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524808568] [2022-03-15 16:37:13,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524808568] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:13,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998084359] [2022-03-15 16:37:13,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:37:13,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:13,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:13,880 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:13,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-15 16:37:13,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:37:13,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:13,901 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:37:13,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:14,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:14,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:14,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:14,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:14,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:14,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:14,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:14,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:14,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:14,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:14,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:14,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:14,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:14,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:37:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:14,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:14,667 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:37:14,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:37:14,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:14,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:14,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:14,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:14,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:14,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:14,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:14,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:14,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:14,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:14,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:14,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:15,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:15,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:15,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:15,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:37:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:15,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998084359] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:15,033 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:15,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-03-15 16:37:15,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466921758] [2022-03-15 16:37:15,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:15,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:37:15,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:15,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:37:15,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:37:15,034 INFO L87 Difference]: Start difference. First operand 4474 states and 11321 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:17,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:17,327 INFO L93 Difference]: Finished difference Result 6009 states and 14790 transitions. [2022-03-15 16:37:17,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:37:17,327 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:37:17,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:17,335 INFO L225 Difference]: With dead ends: 6009 [2022-03-15 16:37:17,335 INFO L226 Difference]: Without dead ends: 5943 [2022-03-15 16:37:17,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=761, Invalid=4641, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 16:37:17,336 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 219 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:17,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 233 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 966 Invalid, 0 Unknown, 177 Unchecked, 0.5s Time] [2022-03-15 16:37:17,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5943 states. [2022-03-15 16:37:17,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5943 to 4546. [2022-03-15 16:37:17,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4546 states, 4545 states have (on average 2.5256325632563255) internal successors, (11479), 4545 states have internal predecessors, (11479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:17,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4546 states to 4546 states and 11479 transitions. [2022-03-15 16:37:17,398 INFO L78 Accepts]: Start accepts. Automaton has 4546 states and 11479 transitions. Word has length 30 [2022-03-15 16:37:17,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:17,398 INFO L470 AbstractCegarLoop]: Abstraction has 4546 states and 11479 transitions. [2022-03-15 16:37:17,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:17,398 INFO L276 IsEmpty]: Start isEmpty. Operand 4546 states and 11479 transitions. [2022-03-15 16:37:17,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:37:17,402 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:17,402 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:17,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-15 16:37:17,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:17,603 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:37:17,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:17,603 INFO L85 PathProgramCache]: Analyzing trace with hash -2043738198, now seen corresponding path program 87 times [2022-03-15 16:37:17,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:17,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359290913] [2022-03-15 16:37:17,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:17,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:17,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:17,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359290913] [2022-03-15 16:37:17,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359290913] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:17,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461093593] [2022-03-15 16:37:17,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:37:17,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:17,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:17,817 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:17,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-15 16:37:17,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 16:37:17,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:17,841 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:37:17,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:18,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:18,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:18,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:18,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:18,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:18,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:18,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:18,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:18,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:18,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:18,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:18,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:18,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:18,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:18,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:18,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:18,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 77 treesize of output 119 [2022-03-15 16:37:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:18,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:19,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:19,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:19,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:19,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:19,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:19,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:19,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:19,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:19,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:19,328 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:19,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 78 treesize of output 223 [2022-03-15 16:37:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:30,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461093593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:30,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:30,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 40 [2022-03-15 16:37:30,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621540920] [2022-03-15 16:37:30,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:30,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:37:30,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:30,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:37:30,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:37:30,061 INFO L87 Difference]: Start difference. First operand 4546 states and 11479 transitions. Second operand has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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) [2022-03-15 16:37:38,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:38,166 INFO L93 Difference]: Finished difference Result 6617 states and 15855 transitions. [2022-03-15 16:37:38,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-15 16:37:38,167 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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 30 [2022-03-15 16:37:38,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:38,175 INFO L225 Difference]: With dead ends: 6617 [2022-03-15 16:37:38,175 INFO L226 Difference]: Without dead ends: 6583 [2022-03-15 16:37:38,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 31 SyntacticMatches, 8 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6498 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2782, Invalid=16678, Unknown=0, NotChecked=0, Total=19460 [2022-03-15 16:37:38,176 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 574 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 1378 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 2411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 872 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:38,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 502 Invalid, 2411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1378 Invalid, 0 Unknown, 872 Unchecked, 0.8s Time] [2022-03-15 16:37:38,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2022-03-15 16:37:38,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 4542. [2022-03-15 16:37:38,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4542 states, 4541 states have (on average 2.522131689055274) internal successors, (11453), 4541 states have internal predecessors, (11453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:38,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4542 states to 4542 states and 11453 transitions. [2022-03-15 16:37:38,263 INFO L78 Accepts]: Start accepts. Automaton has 4542 states and 11453 transitions. Word has length 30 [2022-03-15 16:37:38,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:38,263 INFO L470 AbstractCegarLoop]: Abstraction has 4542 states and 11453 transitions. [2022-03-15 16:37:38,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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) [2022-03-15 16:37:38,263 INFO L276 IsEmpty]: Start isEmpty. Operand 4542 states and 11453 transitions. [2022-03-15 16:37:38,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:37:38,267 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:38,267 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:38,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-15 16:37:38,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:38,467 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:37:38,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:38,468 INFO L85 PathProgramCache]: Analyzing trace with hash -761180122, now seen corresponding path program 88 times [2022-03-15 16:37:38,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:38,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525383893] [2022-03-15 16:37:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:38,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:38,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:38,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525383893] [2022-03-15 16:37:38,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525383893] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:38,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458176936] [2022-03-15 16:37:38,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:37:38,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:38,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:38,697 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:38,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-15 16:37:38,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:37:38,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:38,719 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:37:38,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:39,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:39,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:39,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:39,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:39,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:39,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:39,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:39,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:39,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:39,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:39,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:39,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:39,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:39,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:37:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:39,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:39,446 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:37:39,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 40 treesize of output 165 [2022-03-15 16:37:39,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:39,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:39,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:39,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:39,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:39,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:39,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:39,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:39,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:39,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:39,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:39,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:39,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:39,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:39,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:39,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:37:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:40,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458176936] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:40,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:40,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 29 [2022-03-15 16:37:40,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434374852] [2022-03-15 16:37:40,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:40,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:37:40,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:40,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:37:40,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:37:40,002 INFO L87 Difference]: Start difference. First operand 4542 states and 11453 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:42,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:42,067 INFO L93 Difference]: Finished difference Result 5404 states and 13338 transitions. [2022-03-15 16:37:42,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:37:42,067 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:37:42,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:42,074 INFO L225 Difference]: With dead ends: 5404 [2022-03-15 16:37:42,074 INFO L226 Difference]: Without dead ends: 5348 [2022-03-15 16:37:42,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=732, Invalid=4670, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 16:37:42,075 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 278 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:42,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 408 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1221 Invalid, 0 Unknown, 130 Unchecked, 0.6s Time] [2022-03-15 16:37:42,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5348 states. [2022-03-15 16:37:42,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5348 to 4711. [2022-03-15 16:37:42,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4711 states, 4710 states have (on average 2.5067940552016985) internal successors, (11807), 4710 states have internal predecessors, (11807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:42,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4711 states to 4711 states and 11807 transitions. [2022-03-15 16:37:42,151 INFO L78 Accepts]: Start accepts. Automaton has 4711 states and 11807 transitions. Word has length 30 [2022-03-15 16:37:42,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:42,151 INFO L470 AbstractCegarLoop]: Abstraction has 4711 states and 11807 transitions. [2022-03-15 16:37:42,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:42,151 INFO L276 IsEmpty]: Start isEmpty. Operand 4711 states and 11807 transitions. [2022-03-15 16:37:42,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:37:42,156 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:42,156 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:42,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:42,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2022-03-15 16:37:42,357 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:37:42,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:42,357 INFO L85 PathProgramCache]: Analyzing trace with hash 295507822, now seen corresponding path program 89 times [2022-03-15 16:37:42,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:42,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556935613] [2022-03-15 16:37:42,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:42,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:42,619 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:42,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556935613] [2022-03-15 16:37:42,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556935613] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:42,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400170894] [2022-03-15 16:37:42,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:37:42,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:42,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:42,620 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:42,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-15 16:37:42,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 16:37:42,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:42,643 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:37:42,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:43,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:43,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:43,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:43,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:43,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:43,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:43,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:43,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:43,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:43,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:43,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:43,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:43,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:37:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:43,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:43,402 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:37:43,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 40 treesize of output 165 [2022-03-15 16:37:43,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:43,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:43,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:43,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:43,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:43,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:43,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:43,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:43,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:43,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:43,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:43,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:43,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:43,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:43,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:43,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:37:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:43,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400170894] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:43,782 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:43,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 29 [2022-03-15 16:37:43,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834731381] [2022-03-15 16:37:43,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:43,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:37:43,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:43,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:37:43,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:37:43,783 INFO L87 Difference]: Start difference. First operand 4711 states and 11807 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:45,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:45,622 INFO L93 Difference]: Finished difference Result 5352 states and 13141 transitions. [2022-03-15 16:37:45,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:37:45,622 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:37:45,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:45,629 INFO L225 Difference]: With dead ends: 5352 [2022-03-15 16:37:45,629 INFO L226 Difference]: Without dead ends: 5345 [2022-03-15 16:37:45,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=642, Invalid=3914, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 16:37:45,630 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 241 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:45,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 297 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1154 Invalid, 0 Unknown, 70 Unchecked, 0.6s Time] [2022-03-15 16:37:45,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5345 states. [2022-03-15 16:37:45,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5345 to 4709. [2022-03-15 16:37:45,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4709 states, 4708 states have (on average 2.5072217502124046) internal successors, (11804), 4708 states have internal predecessors, (11804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:45,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4709 states to 4709 states and 11804 transitions. [2022-03-15 16:37:45,707 INFO L78 Accepts]: Start accepts. Automaton has 4709 states and 11804 transitions. Word has length 30 [2022-03-15 16:37:45,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:45,707 INFO L470 AbstractCegarLoop]: Abstraction has 4709 states and 11804 transitions. [2022-03-15 16:37:45,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:45,707 INFO L276 IsEmpty]: Start isEmpty. Operand 4709 states and 11804 transitions. [2022-03-15 16:37:45,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:37:45,712 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:45,712 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:45,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-15 16:37:45,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:45,912 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:37:45,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:45,913 INFO L85 PathProgramCache]: Analyzing trace with hash 181205862, now seen corresponding path program 90 times [2022-03-15 16:37:45,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:45,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630027091] [2022-03-15 16:37:45,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:45,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:46,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:46,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630027091] [2022-03-15 16:37:46,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630027091] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:46,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563632957] [2022-03-15 16:37:46,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:37:46,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:46,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:46,145 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:46,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-15 16:37:46,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 16:37:46,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:46,167 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 16:37:46,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:46,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:46,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:46,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:46,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:46,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:46,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:46,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:46,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:46,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:46,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 75 [2022-03-15 16:37:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:46,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:48,622 INFO L353 Elim1Store]: treesize reduction 76, result has 73.0 percent of original size [2022-03-15 16:37:48,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 74 treesize of output 231 [2022-03-15 16:38:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:33,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563632957] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:33,983 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:33,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 40 [2022-03-15 16:38:33,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336148310] [2022-03-15 16:38:33,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:33,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:38:33,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:33,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:38:33,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:38:33,984 INFO L87 Difference]: Start difference. First operand 4709 states and 11804 transitions. Second operand has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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) [2022-03-15 16:38:42,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:42,057 INFO L93 Difference]: Finished difference Result 9227 states and 22664 transitions. [2022-03-15 16:38:42,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-15 16:38:42,057 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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 30 [2022-03-15 16:38:42,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:42,069 INFO L225 Difference]: With dead ends: 9227 [2022-03-15 16:38:42,070 INFO L226 Difference]: Without dead ends: 9183 [2022-03-15 16:38:42,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 33 SyntacticMatches, 20 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7482 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=2589, Invalid=15771, Unknown=0, NotChecked=0, Total=18360 [2022-03-15 16:38:42,071 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 400 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 2847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1804 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:42,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 352 Invalid, 2847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 922 Invalid, 0 Unknown, 1804 Unchecked, 0.5s Time] [2022-03-15 16:38:42,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9183 states. [2022-03-15 16:38:42,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9183 to 6044. [2022-03-15 16:38:42,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6044 states, 6043 states have (on average 2.513983120966407) internal successors, (15192), 6043 states have internal predecessors, (15192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:42,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6044 states to 6044 states and 15192 transitions. [2022-03-15 16:38:42,167 INFO L78 Accepts]: Start accepts. Automaton has 6044 states and 15192 transitions. Word has length 30 [2022-03-15 16:38:42,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:42,167 INFO L470 AbstractCegarLoop]: Abstraction has 6044 states and 15192 transitions. [2022-03-15 16:38:42,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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) [2022-03-15 16:38:42,167 INFO L276 IsEmpty]: Start isEmpty. Operand 6044 states and 15192 transitions. [2022-03-15 16:38:42,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:38:42,173 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:42,173 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:38:42,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-15 16:38:42,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:42,374 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:38:42,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:42,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1549563870, now seen corresponding path program 91 times [2022-03-15 16:38:42,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:42,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868898865] [2022-03-15 16:38:42,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:42,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:42,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:42,624 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:42,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868898865] [2022-03-15 16:38:42,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868898865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:42,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080767694] [2022-03-15 16:38:42,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:38:42,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:42,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:42,625 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:42,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-15 16:38:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:42,647 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:38:42,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:43,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:43,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:43,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:43,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:43,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:43,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:43,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:43,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:43,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:43,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:43,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:43,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:43,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:43,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:38:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:43,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:43,415 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:38:43,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:38:43,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:43,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:43,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:43,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:43,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:43,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:43,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:43,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:43,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:43,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:43,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:43,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:43,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:43,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:43,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:43,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:38:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:44,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080767694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:44,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:44,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-03-15 16:38:44,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872663645] [2022-03-15 16:38:44,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:44,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:38:44,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:44,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:38:44,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:38:44,006 INFO L87 Difference]: Start difference. First operand 6044 states and 15192 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:46,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:46,886 INFO L93 Difference]: Finished difference Result 7098 states and 17655 transitions. [2022-03-15 16:38:46,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 16:38:46,886 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:38:46,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:46,896 INFO L225 Difference]: With dead ends: 7098 [2022-03-15 16:38:46,896 INFO L226 Difference]: Without dead ends: 7052 [2022-03-15 16:38:46,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2046 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=931, Invalid=6209, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 16:38:46,897 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 277 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 1572 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:46,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 340 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1572 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:38:46,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7052 states. [2022-03-15 16:38:46,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7052 to 5783. [2022-03-15 16:38:46,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5783 states, 5782 states have (on average 2.5051885160844) internal successors, (14485), 5782 states have internal predecessors, (14485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:46,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5783 states to 5783 states and 14485 transitions. [2022-03-15 16:38:46,985 INFO L78 Accepts]: Start accepts. Automaton has 5783 states and 14485 transitions. Word has length 30 [2022-03-15 16:38:46,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:46,985 INFO L470 AbstractCegarLoop]: Abstraction has 5783 states and 14485 transitions. [2022-03-15 16:38:46,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:46,985 INFO L276 IsEmpty]: Start isEmpty. Operand 5783 states and 14485 transitions. [2022-03-15 16:38:46,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:38:46,991 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:46,991 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:38:47,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-15 16:38:47,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:47,191 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:38:47,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:47,192 INFO L85 PathProgramCache]: Analyzing trace with hash 846912614, now seen corresponding path program 92 times [2022-03-15 16:38:47,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:47,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948351141] [2022-03-15 16:38:47,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:47,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:47,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:47,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948351141] [2022-03-15 16:38:47,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948351141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:47,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69055590] [2022-03-15 16:38:47,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:38:47,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:47,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:47,425 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:47,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-15 16:38:47,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:38:47,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:47,445 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:38:47,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:47,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:47,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:47,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:47,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:47,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:47,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:47,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:47,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:47,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:47,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:47,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:47,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:47,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:47,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:47,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:47,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:38:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:47,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:48,194 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:38:48,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:38:48,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:48,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:48,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:48,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:48,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:48,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:48,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:48,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:48,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:48,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:48,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:48,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:48,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:48,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:48,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:48,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:38:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:48,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69055590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:48,590 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:48,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-03-15 16:38:48,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570043942] [2022-03-15 16:38:48,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:48,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:38:48,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:48,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:38:48,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:38:48,591 INFO L87 Difference]: Start difference. First operand 5783 states and 14485 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:51,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:51,418 INFO L93 Difference]: Finished difference Result 7282 states and 18026 transitions. [2022-03-15 16:38:51,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 16:38:51,418 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:38:51,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:51,429 INFO L225 Difference]: With dead ends: 7282 [2022-03-15 16:38:51,429 INFO L226 Difference]: Without dead ends: 7252 [2022-03-15 16:38:51,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=806, Invalid=5674, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 16:38:51,430 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 246 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:51,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 346 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:38:51,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7252 states. [2022-03-15 16:38:51,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7252 to 5867. [2022-03-15 16:38:51,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5867 states, 5866 states have (on average 2.5124445959768154) internal successors, (14738), 5866 states have internal predecessors, (14738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:51,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5867 states to 5867 states and 14738 transitions. [2022-03-15 16:38:51,513 INFO L78 Accepts]: Start accepts. Automaton has 5867 states and 14738 transitions. Word has length 30 [2022-03-15 16:38:51,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:51,514 INFO L470 AbstractCegarLoop]: Abstraction has 5867 states and 14738 transitions. [2022-03-15 16:38:51,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:51,514 INFO L276 IsEmpty]: Start isEmpty. Operand 5867 states and 14738 transitions. [2022-03-15 16:38:51,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:38:51,520 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:51,520 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:38:51,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-15 16:38:51,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:51,720 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:38:51,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:51,721 INFO L85 PathProgramCache]: Analyzing trace with hash 968145010, now seen corresponding path program 93 times [2022-03-15 16:38:51,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:51,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529029003] [2022-03-15 16:38:51,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:51,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:51,975 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:51,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529029003] [2022-03-15 16:38:51,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529029003] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:51,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095205044] [2022-03-15 16:38:51,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:38:51,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:51,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:51,976 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:51,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-15 16:38:51,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:38:51,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:51,998 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 16:38:51,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:52,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:52,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:52,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:52,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:52,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:52,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:52,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:52,741 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:38:52,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 69 treesize of output 127 [2022-03-15 16:38:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:52,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:54,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:54,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:54,980 INFO L353 Elim1Store]: treesize reduction 44, result has 83.1 percent of original size [2022-03-15 16:38:54,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 73 treesize of output 242 [2022-03-15 16:39:28,620 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:28,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095205044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:28,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:28,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-03-15 16:39:28,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34949190] [2022-03-15 16:39:28,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:28,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 16:39:28,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:28,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 16:39:28,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:39:28,622 INFO L87 Difference]: Start difference. First operand 5867 states and 14738 transitions. Second operand has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:31,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:31,569 INFO L93 Difference]: Finished difference Result 8982 states and 21661 transitions. [2022-03-15 16:39:31,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:39:31,569 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:39:31,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:31,581 INFO L225 Difference]: With dead ends: 8982 [2022-03-15 16:39:31,581 INFO L226 Difference]: Without dead ends: 8935 [2022-03-15 16:39:31,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=581, Invalid=4249, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 16:39:31,582 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 178 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 660 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:31,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 272 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 591 Invalid, 0 Unknown, 660 Unchecked, 0.3s Time] [2022-03-15 16:39:31,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8935 states. [2022-03-15 16:39:31,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8935 to 5939. [2022-03-15 16:39:31,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5939 states, 5938 states have (on average 2.506567867969013) internal successors, (14884), 5938 states have internal predecessors, (14884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:31,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 14884 transitions. [2022-03-15 16:39:31,670 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 14884 transitions. Word has length 30 [2022-03-15 16:39:31,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:31,670 INFO L470 AbstractCegarLoop]: Abstraction has 5939 states and 14884 transitions. [2022-03-15 16:39:31,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:31,671 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 14884 transitions. [2022-03-15 16:39:31,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:39:31,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:31,677 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:31,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-15 16:39:31,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-03-15 16:39:31,877 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:39:31,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:31,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1672644370, now seen corresponding path program 94 times [2022-03-15 16:39:31,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:31,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265531651] [2022-03-15 16:39:31,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:31,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:32,156 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:32,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:32,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265531651] [2022-03-15 16:39:32,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265531651] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:32,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089591015] [2022-03-15 16:39:32,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:39:32,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:32,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:32,157 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:32,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-15 16:39:32,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:39:32,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:32,193 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:39:32,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:32,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:32,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:32,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:32,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:32,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:32,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:32,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:32,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:32,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:32,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:32,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:32,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:32,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:32,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:32,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:39:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:32,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:32,960 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:39:32,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:39:33,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:33,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:33,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:33,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:33,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:33,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:33,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:33,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:33,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:33,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:33,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:33,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:33,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:33,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:33,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:33,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:39:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:33,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089591015] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:33,313 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:33,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-15 16:39:33,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742336867] [2022-03-15 16:39:33,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:33,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:39:33,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:33,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:39:33,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:39:33,314 INFO L87 Difference]: Start difference. First operand 5939 states and 14884 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:35,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:35,323 INFO L93 Difference]: Finished difference Result 7445 states and 18245 transitions. [2022-03-15 16:39:35,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 16:39:35,323 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:39:35,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:35,334 INFO L225 Difference]: With dead ends: 7445 [2022-03-15 16:39:35,334 INFO L226 Difference]: Without dead ends: 7397 [2022-03-15 16:39:35,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1747 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=778, Invalid=4772, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 16:39:35,335 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 240 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:35,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 167 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 921 Invalid, 0 Unknown, 77 Unchecked, 0.5s Time] [2022-03-15 16:39:35,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7397 states. [2022-03-15 16:39:35,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7397 to 5905. [2022-03-15 16:39:35,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5905 states, 5904 states have (on average 2.504742547425474) internal successors, (14788), 5904 states have internal predecessors, (14788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:35,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5905 states to 5905 states and 14788 transitions. [2022-03-15 16:39:35,416 INFO L78 Accepts]: Start accepts. Automaton has 5905 states and 14788 transitions. Word has length 30 [2022-03-15 16:39:35,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:35,416 INFO L470 AbstractCegarLoop]: Abstraction has 5905 states and 14788 transitions. [2022-03-15 16:39:35,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:35,416 INFO L276 IsEmpty]: Start isEmpty. Operand 5905 states and 14788 transitions. [2022-03-15 16:39:35,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:39:35,422 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:35,422 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:35,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-15 16:39:35,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-03-15 16:39:35,623 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:39:35,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:35,623 INFO L85 PathProgramCache]: Analyzing trace with hash -298602706, now seen corresponding path program 95 times [2022-03-15 16:39:35,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:35,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267240344] [2022-03-15 16:39:35,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:35,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:35,868 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:35,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:35,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267240344] [2022-03-15 16:39:35,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267240344] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:35,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273826169] [2022-03-15 16:39:35,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:39:35,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:35,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:35,869 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:35,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-15 16:39:35,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:39:35,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:35,890 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:39:35,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:36,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:36,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:36,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:36,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:36,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:36,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:36,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:36,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:36,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:36,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:36,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:36,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:36,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:36,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:36,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:39:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:36,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:36,638 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:39:36,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 40 treesize of output 165 [2022-03-15 16:39:37,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:37,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:37,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:37,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:37,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:37,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:37,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:37,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:37,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:37,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:37,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:37,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:37,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:37,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:37,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:37,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:39:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:37,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273826169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:37,164 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:37,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-15 16:39:37,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177632786] [2022-03-15 16:39:37,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:37,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:39:37,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:37,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:39:37,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:39:37,165 INFO L87 Difference]: Start difference. First operand 5905 states and 14788 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:38,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:38,872 INFO L93 Difference]: Finished difference Result 6938 states and 17086 transitions. [2022-03-15 16:39:38,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 16:39:38,872 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:39:38,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:38,882 INFO L225 Difference]: With dead ends: 6938 [2022-03-15 16:39:38,882 INFO L226 Difference]: Without dead ends: 6880 [2022-03-15 16:39:38,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=461, Invalid=3445, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 16:39:38,883 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 242 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:38,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 345 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1443 Invalid, 0 Unknown, 45 Unchecked, 0.7s Time] [2022-03-15 16:39:38,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6880 states. [2022-03-15 16:39:38,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6880 to 6284. [2022-03-15 16:39:38,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6284 states, 6283 states have (on average 2.5102657965939836) internal successors, (15772), 6283 states have internal predecessors, (15772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:38,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6284 states to 6284 states and 15772 transitions. [2022-03-15 16:39:38,971 INFO L78 Accepts]: Start accepts. Automaton has 6284 states and 15772 transitions. Word has length 30 [2022-03-15 16:39:38,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:38,971 INFO L470 AbstractCegarLoop]: Abstraction has 6284 states and 15772 transitions. [2022-03-15 16:39:38,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:38,971 INFO L276 IsEmpty]: Start isEmpty. Operand 6284 states and 15772 transitions. [2022-03-15 16:39:38,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:39:38,977 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:38,977 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:39,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-15 16:39:39,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-15 16:39:39,177 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:39:39,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:39,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1926341354, now seen corresponding path program 96 times [2022-03-15 16:39:39,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:39,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176145477] [2022-03-15 16:39:39,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:39,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:39,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:39,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176145477] [2022-03-15 16:39:39,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176145477] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:39,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089954669] [2022-03-15 16:39:39,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:39:39,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:39,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:39,435 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:39,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-15 16:39:39,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:39:39,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:39,457 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 16:39:39,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:39,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:39,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:39,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:39,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:39,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:39,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:39,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:39,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:39,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:39,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:39,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 75 [2022-03-15 16:39:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:40,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:42,133 INFO L353 Elim1Store]: treesize reduction 76, result has 73.0 percent of original size [2022-03-15 16:39:42,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 74 treesize of output 231 [2022-03-15 16:40:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:50,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089954669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:50,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:50,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 39 [2022-03-15 16:40:50,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076386539] [2022-03-15 16:40:50,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:50,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 16:40:50,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:50,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 16:40:50,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:40:50,689 INFO L87 Difference]: Start difference. First operand 6284 states and 15772 transitions. Second operand has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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) [2022-03-15 16:40:57,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:57,536 INFO L93 Difference]: Finished difference Result 10837 states and 26549 transitions. [2022-03-15 16:40:57,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-15 16:40:57,536 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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 30 [2022-03-15 16:40:57,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:57,552 INFO L225 Difference]: With dead ends: 10837 [2022-03-15 16:40:57,552 INFO L226 Difference]: Without dead ends: 10791 [2022-03-15 16:40:57,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 36 SyntacticMatches, 27 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 4633 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1554, Invalid=10218, Unknown=0, NotChecked=0, Total=11772 [2022-03-15 16:40:57,553 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 215 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1178 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:57,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 298 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 735 Invalid, 0 Unknown, 1178 Unchecked, 0.4s Time] [2022-03-15 16:40:57,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10791 states. [2022-03-15 16:40:57,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10791 to 6996. [2022-03-15 16:40:57,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6996 states, 6995 states have (on average 2.5122230164403145) internal successors, (17573), 6995 states have internal predecessors, (17573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:57,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6996 states to 6996 states and 17573 transitions. [2022-03-15 16:40:57,675 INFO L78 Accepts]: Start accepts. Automaton has 6996 states and 17573 transitions. Word has length 30 [2022-03-15 16:40:57,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:57,675 INFO L470 AbstractCegarLoop]: Abstraction has 6996 states and 17573 transitions. [2022-03-15 16:40:57,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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) [2022-03-15 16:40:57,675 INFO L276 IsEmpty]: Start isEmpty. Operand 6996 states and 17573 transitions. [2022-03-15 16:40:57,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:40:57,684 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:57,684 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:40:57,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-15 16:40:57,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:57,887 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:40:57,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:57,888 INFO L85 PathProgramCache]: Analyzing trace with hash 871858922, now seen corresponding path program 97 times [2022-03-15 16:40:57,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:57,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870675763] [2022-03-15 16:40:57,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:57,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:58,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:58,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870675763] [2022-03-15 16:40:58,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870675763] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:58,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325522463] [2022-03-15 16:40:58,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:40:58,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:58,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:58,183 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:58,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-15 16:40:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:58,206 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:40:58,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:58,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:58,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:58,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:58,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:58,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:58,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:58,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:58,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:58,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:58,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:58,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:58,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:58,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:58,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:58,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:40:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:58,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:58,991 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:40:58,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:40:59,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:59,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:59,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:59,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:59,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:59,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:59,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:59,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:59,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:59,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:59,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:59,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:59,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:59,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:59,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:59,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:40:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:59,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325522463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:59,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:59,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-03-15 16:40:59,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889232065] [2022-03-15 16:40:59,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:59,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:40:59,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:59,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:40:59,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:40:59,454 INFO L87 Difference]: Start difference. First operand 6996 states and 17573 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:03,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:03,103 INFO L93 Difference]: Finished difference Result 10236 states and 25134 transitions. [2022-03-15 16:41:03,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-15 16:41:03,103 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:41:03,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:03,128 INFO L225 Difference]: With dead ends: 10236 [2022-03-15 16:41:03,128 INFO L226 Difference]: Without dead ends: 10148 [2022-03-15 16:41:03,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2748 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1148, Invalid=7972, Unknown=0, NotChecked=0, Total=9120 [2022-03-15 16:41:03,129 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 354 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 1719 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:03,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 364 Invalid, 1849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1719 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:41:03,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10148 states. [2022-03-15 16:41:03,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10148 to 6838. [2022-03-15 16:41:03,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6838 states, 6837 states have (on average 2.5066549656281993) internal successors, (17138), 6837 states have internal predecessors, (17138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:03,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6838 states to 6838 states and 17138 transitions. [2022-03-15 16:41:03,225 INFO L78 Accepts]: Start accepts. Automaton has 6838 states and 17138 transitions. Word has length 30 [2022-03-15 16:41:03,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:03,225 INFO L470 AbstractCegarLoop]: Abstraction has 6838 states and 17138 transitions. [2022-03-15 16:41:03,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:03,225 INFO L276 IsEmpty]: Start isEmpty. Operand 6838 states and 17138 transitions. [2022-03-15 16:41:03,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:41:03,232 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:03,232 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:41:03,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:03,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-03-15 16:41:03,433 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:03,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:03,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1702919190, now seen corresponding path program 98 times [2022-03-15 16:41:03,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:03,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083455032] [2022-03-15 16:41:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:03,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:41:03,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:03,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083455032] [2022-03-15 16:41:03,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083455032] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:03,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546012624] [2022-03-15 16:41:03,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:41:03,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:03,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:03,678 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:03,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-15 16:41:03,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:41:03,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:03,698 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:41:03,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:04,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:04,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:04,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:04,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:04,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:04,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:04,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:04,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:04,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:04,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:04,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:41:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:04,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:04,496 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:41:04,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:41:04,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:04,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:04,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:04,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:04,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:04,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:04,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:04,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:04,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:04,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:04,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:04,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:04,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:04,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:04,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:04,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:41:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:04,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546012624] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:04,990 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:04,990 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-03-15 16:41:04,990 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648203580] [2022-03-15 16:41:04,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:04,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:41:04,990 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:04,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:41:04,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:41:04,991 INFO L87 Difference]: Start difference. First operand 6838 states and 17138 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:08,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:08,314 INFO L93 Difference]: Finished difference Result 8248 states and 20512 transitions. [2022-03-15 16:41:08,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 16:41:08,315 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:41:08,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:08,326 INFO L225 Difference]: With dead ends: 8248 [2022-03-15 16:41:08,326 INFO L226 Difference]: Without dead ends: 8172 [2022-03-15 16:41:08,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1929 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=862, Invalid=6448, Unknown=0, NotChecked=0, Total=7310 [2022-03-15 16:41:08,327 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 216 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:08,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 296 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1637 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:41:08,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8172 states. [2022-03-15 16:41:08,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8172 to 6987. [2022-03-15 16:41:08,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6987 states, 6986 states have (on average 2.5052963068995133) internal successors, (17502), 6986 states have internal predecessors, (17502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:08,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6987 states to 6987 states and 17502 transitions. [2022-03-15 16:41:08,420 INFO L78 Accepts]: Start accepts. Automaton has 6987 states and 17502 transitions. Word has length 30 [2022-03-15 16:41:08,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:08,420 INFO L470 AbstractCegarLoop]: Abstraction has 6987 states and 17502 transitions. [2022-03-15 16:41:08,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:08,421 INFO L276 IsEmpty]: Start isEmpty. Operand 6987 states and 17502 transitions. [2022-03-15 16:41:08,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:41:08,428 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:08,428 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:41:08,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-15 16:41:08,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:08,628 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:08,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:08,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1908857622, now seen corresponding path program 99 times [2022-03-15 16:41:08,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:08,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977103943] [2022-03-15 16:41:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:08,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:08,932 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:08,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977103943] [2022-03-15 16:41:08,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977103943] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:08,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067959964] [2022-03-15 16:41:08,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:41:08,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:08,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:08,934 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:08,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-15 16:41:08,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 16:41:08,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:08,955 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 16:41:08,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:09,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:09,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:09,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:09,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:09,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:09,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:09,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:09,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 69 treesize of output 137 [2022-03-15 16:41:15,375 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:15,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:16,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:16,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:17,170 INFO L353 Elim1Store]: treesize reduction 44, result has 83.1 percent of original size [2022-03-15 16:41:17,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 74 treesize of output 243 [2022-03-15 16:42:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:03,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067959964] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:03,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:03,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 40 [2022-03-15 16:42:03,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109098716] [2022-03-15 16:42:03,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:03,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:42:03,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:03,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:42:03,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:42:03,522 INFO L87 Difference]: Start difference. First operand 6987 states and 17502 transitions. Second operand has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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) [2022-03-15 16:42:09,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:09,667 INFO L93 Difference]: Finished difference Result 9822 states and 24035 transitions. [2022-03-15 16:42:09,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-15 16:42:09,667 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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 30 [2022-03-15 16:42:09,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:09,681 INFO L225 Difference]: With dead ends: 9822 [2022-03-15 16:42:09,681 INFO L226 Difference]: Without dead ends: 9757 [2022-03-15 16:42:09,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 44 SyntacticMatches, 18 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4550 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1648, Invalid=12158, Unknown=0, NotChecked=0, Total=13806 [2022-03-15 16:42:09,682 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 223 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 2486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1254 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:09,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 452 Invalid, 2486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1132 Invalid, 0 Unknown, 1254 Unchecked, 0.6s Time] [2022-03-15 16:42:09,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9757 states. [2022-03-15 16:42:09,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9757 to 7259. [2022-03-15 16:42:09,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7259 states, 7258 states have (on average 2.4977955359603197) internal successors, (18129), 7258 states have internal predecessors, (18129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:09,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7259 states to 7259 states and 18129 transitions. [2022-03-15 16:42:09,813 INFO L78 Accepts]: Start accepts. Automaton has 7259 states and 18129 transitions. Word has length 30 [2022-03-15 16:42:09,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:09,813 INFO L470 AbstractCegarLoop]: Abstraction has 7259 states and 18129 transitions. [2022-03-15 16:42:09,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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) [2022-03-15 16:42:09,813 INFO L276 IsEmpty]: Start isEmpty. Operand 7259 states and 18129 transitions. [2022-03-15 16:42:09,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:42:09,820 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:09,820 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:09,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:10,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-15 16:42:10,021 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:42:10,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:10,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1519015272, now seen corresponding path program 100 times [2022-03-15 16:42:10,021 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:10,021 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085863940] [2022-03-15 16:42:10,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:10,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:10,309 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:10,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085863940] [2022-03-15 16:42:10,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085863940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:10,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525174245] [2022-03-15 16:42:10,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:42:10,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:10,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:10,310 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:10,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-15 16:42:10,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:42:10,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:10,332 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:42:10,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:10,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:10,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:10,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:10,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:10,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:10,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:10,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:10,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:10,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:10,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:10,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:10,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:10,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:10,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:42:10,715 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:10,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:11,113 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:42:11,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:42:11,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:11,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:11,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:11,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:11,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:11,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:11,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:11,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:11,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:11,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:11,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:11,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:11,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:11,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:11,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:11,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:42:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:11,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525174245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:11,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:11,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-03-15 16:42:11,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754637857] [2022-03-15 16:42:11,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:11,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:42:11,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:11,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:42:11,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:42:11,601 INFO L87 Difference]: Start difference. First operand 7259 states and 18129 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:14,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:14,964 INFO L93 Difference]: Finished difference Result 8399 states and 20728 transitions. [2022-03-15 16:42:14,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 16:42:14,964 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:42:14,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:14,976 INFO L225 Difference]: With dead ends: 8399 [2022-03-15 16:42:14,976 INFO L226 Difference]: Without dead ends: 8322 [2022-03-15 16:42:14,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1923 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=798, Invalid=6684, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 16:42:14,976 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 223 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1892 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 1966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:14,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 350 Invalid, 1966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1892 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:42:14,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8322 states. [2022-03-15 16:42:15,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8322 to 7589. [2022-03-15 16:42:15,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7589 states, 7588 states have (on average 2.4965735371639433) internal successors, (18944), 7588 states have internal predecessors, (18944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:15,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7589 states to 7589 states and 18944 transitions. [2022-03-15 16:42:15,075 INFO L78 Accepts]: Start accepts. Automaton has 7589 states and 18944 transitions. Word has length 30 [2022-03-15 16:42:15,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:15,075 INFO L470 AbstractCegarLoop]: Abstraction has 7589 states and 18944 transitions. [2022-03-15 16:42:15,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:15,075 INFO L276 IsEmpty]: Start isEmpty. Operand 7589 states and 18944 transitions. [2022-03-15 16:42:15,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:42:15,083 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:15,083 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:15,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:15,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:15,305 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:42:15,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:15,306 INFO L85 PathProgramCache]: Analyzing trace with hash -2041359046, now seen corresponding path program 101 times [2022-03-15 16:42:15,306 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:15,306 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071881450] [2022-03-15 16:42:15,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:15,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:15,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:15,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071881450] [2022-03-15 16:42:15,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071881450] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:15,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504886982] [2022-03-15 16:42:15,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:42:15,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:15,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:15,594 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:15,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-15 16:42:15,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:42:15,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:15,615 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:42:15,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:16,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:16,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:16,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:16,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:16,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:16,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:16,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:16,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:16,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:16,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:16,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:16,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:42:16,039 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:16,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:16,421 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:42:16,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:42:16,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:16,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:16,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:16,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:16,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:16,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:16,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:16,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:16,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:16,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:16,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:16,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:16,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:16,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:16,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:16,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:42:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:16,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504886982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:16,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:16,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-15 16:42:16,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601335269] [2022-03-15 16:42:16,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:16,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:42:16,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:16,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:42:16,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:42:16,935 INFO L87 Difference]: Start difference. First operand 7589 states and 18944 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:19,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:19,075 INFO L93 Difference]: Finished difference Result 9687 states and 23583 transitions. [2022-03-15 16:42:19,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:42:19,075 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:42:19,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:19,089 INFO L225 Difference]: With dead ends: 9687 [2022-03-15 16:42:19,089 INFO L226 Difference]: Without dead ends: 9645 [2022-03-15 16:42:19,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=561, Invalid=4551, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 16:42:19,090 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 194 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 408 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:19,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 240 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1138 Invalid, 0 Unknown, 408 Unchecked, 0.6s Time] [2022-03-15 16:42:19,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9645 states. [2022-03-15 16:42:19,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9645 to 7716. [2022-03-15 16:42:19,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7716 states, 7715 states have (on average 2.4952689565780948) internal successors, (19251), 7715 states have internal predecessors, (19251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:19,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7716 states to 7716 states and 19251 transitions. [2022-03-15 16:42:19,215 INFO L78 Accepts]: Start accepts. Automaton has 7716 states and 19251 transitions. Word has length 30 [2022-03-15 16:42:19,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:19,215 INFO L470 AbstractCegarLoop]: Abstraction has 7716 states and 19251 transitions. [2022-03-15 16:42:19,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:19,215 INFO L276 IsEmpty]: Start isEmpty. Operand 7716 states and 19251 transitions. [2022-03-15 16:42:19,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:42:19,224 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:19,225 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:19,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-03-15 16:42:19,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-03-15 16:42:19,425 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:42:19,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:19,426 INFO L85 PathProgramCache]: Analyzing trace with hash -552006922, now seen corresponding path program 102 times [2022-03-15 16:42:19,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:19,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455687497] [2022-03-15 16:42:19,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:19,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:19,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:19,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455687497] [2022-03-15 16:42:19,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455687497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:19,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039484948] [2022-03-15 16:42:19,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:42:19,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:19,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:19,703 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:19,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-15 16:42:19,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:42:19,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:19,724 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:42:19,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:20,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:20,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:20,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:20,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:20,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:20,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:20,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:20,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:20,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:20,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:20,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:42:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:20,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:20,526 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:42:20,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:42:20,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:20,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:20,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:20,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:20,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:20,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:20,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:20,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:20,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:20,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:20,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:20,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:20,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:20,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:20,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:20,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:42:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:21,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039484948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:21,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:21,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-15 16:42:21,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066639582] [2022-03-15 16:42:21,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:21,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:42:21,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:21,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:42:21,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:42:21,021 INFO L87 Difference]: Start difference. First operand 7716 states and 19251 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:23,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:23,807 INFO L93 Difference]: Finished difference Result 9343 states and 22828 transitions. [2022-03-15 16:42:23,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 16:42:23,807 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:42:23,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:23,820 INFO L225 Difference]: With dead ends: 9343 [2022-03-15 16:42:23,820 INFO L226 Difference]: Without dead ends: 9253 [2022-03-15 16:42:23,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1749 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=756, Invalid=5564, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 16:42:23,821 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 216 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:23,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 184 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1191 Invalid, 0 Unknown, 256 Unchecked, 0.6s Time] [2022-03-15 16:42:23,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9253 states. [2022-03-15 16:42:23,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9253 to 7775. [2022-03-15 16:42:23,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7775 states, 7774 states have (on average 2.491381528170826) internal successors, (19368), 7774 states have internal predecessors, (19368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:23,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7775 states to 7775 states and 19368 transitions. [2022-03-15 16:42:23,935 INFO L78 Accepts]: Start accepts. Automaton has 7775 states and 19368 transitions. Word has length 30 [2022-03-15 16:42:23,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:23,935 INFO L470 AbstractCegarLoop]: Abstraction has 7775 states and 19368 transitions. [2022-03-15 16:42:23,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:23,936 INFO L276 IsEmpty]: Start isEmpty. Operand 7775 states and 19368 transitions. [2022-03-15 16:42:23,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:42:23,944 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:23,944 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:23,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:24,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:24,145 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:42:24,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:24,145 INFO L85 PathProgramCache]: Analyzing trace with hash -387775446, now seen corresponding path program 103 times [2022-03-15 16:42:24,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:24,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493001060] [2022-03-15 16:42:24,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:24,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:24,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:42:24,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:24,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493001060] [2022-03-15 16:42:24,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493001060] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:24,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2555972] [2022-03-15 16:42:24,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:42:24,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:24,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:24,406 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:24,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-15 16:42:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:24,426 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:42:24,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:24,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:24,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:24,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:24,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:24,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:24,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:24,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:24,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:24,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:24,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:24,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:42:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:24,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:25,199 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:42:25,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:42:25,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:25,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:25,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:25,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:25,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:25,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:25,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:25,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:25,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:25,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:25,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:25,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:25,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:25,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:25,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:25,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:42:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:25,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2555972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:25,845 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:25,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-03-15 16:42:25,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532832194] [2022-03-15 16:42:25,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:25,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:42:25,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:25,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:42:25,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:42:25,846 INFO L87 Difference]: Start difference. First operand 7775 states and 19368 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:28,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:28,825 INFO L93 Difference]: Finished difference Result 9271 states and 22798 transitions. [2022-03-15 16:42:28,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 16:42:28,826 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:42:28,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:28,839 INFO L225 Difference]: With dead ends: 9271 [2022-03-15 16:42:28,840 INFO L226 Difference]: Without dead ends: 9179 [2022-03-15 16:42:28,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1012, Invalid=6128, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 16:42:28,840 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 296 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 1565 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:28,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 346 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1565 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:42:28,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9179 states. [2022-03-15 16:42:28,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9179 to 8147. [2022-03-15 16:42:28,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8147 states, 8146 states have (on average 2.480726737048858) internal successors, (20208), 8146 states have internal predecessors, (20208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8147 states to 8147 states and 20208 transitions. [2022-03-15 16:42:28,983 INFO L78 Accepts]: Start accepts. Automaton has 8147 states and 20208 transitions. Word has length 30 [2022-03-15 16:42:28,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:28,983 INFO L470 AbstractCegarLoop]: Abstraction has 8147 states and 20208 transitions. [2022-03-15 16:42:28,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:28,983 INFO L276 IsEmpty]: Start isEmpty. Operand 8147 states and 20208 transitions. [2022-03-15 16:42:28,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:42:28,991 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:28,991 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:29,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-03-15 16:42:29,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:29,193 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:42:29,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:29,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1730964982, now seen corresponding path program 104 times [2022-03-15 16:42:29,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:29,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893871255] [2022-03-15 16:42:29,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:29,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:29,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:29,456 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:29,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893871255] [2022-03-15 16:42:29,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893871255] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:29,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093666150] [2022-03-15 16:42:29,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:42:29,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:29,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:29,457 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:29,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-15 16:42:29,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:42:29,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:29,477 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:42:29,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:29,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:29,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:29,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:29,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:29,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:29,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:29,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:29,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:29,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:29,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:29,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:29,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:29,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:29,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:42:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:29,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:30,245 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:42:30,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:42:30,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:30,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:30,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:30,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:30,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:30,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:30,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:30,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:30,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:30,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:30,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:30,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:30,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:30,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:30,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:30,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:42:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:30,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093666150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:30,633 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:30,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-15 16:42:30,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741546842] [2022-03-15 16:42:30,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:30,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:42:30,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:30,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:42:30,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:42:30,634 INFO L87 Difference]: Start difference. First operand 8147 states and 20208 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:32,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:32,914 INFO L93 Difference]: Finished difference Result 9839 states and 23846 transitions. [2022-03-15 16:42:32,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:42:32,914 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:42:32,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:32,928 INFO L225 Difference]: With dead ends: 9839 [2022-03-15 16:42:32,928 INFO L226 Difference]: Without dead ends: 9794 [2022-03-15 16:42:32,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=658, Invalid=4744, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 16:42:32,929 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 219 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:32,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 363 Invalid, 1917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1436 Invalid, 0 Unknown, 410 Unchecked, 0.8s Time] [2022-03-15 16:42:32,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9794 states. [2022-03-15 16:42:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9794 to 8058. [2022-03-15 16:42:33,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8058 states, 8057 states have (on average 2.4876504902569194) internal successors, (20043), 8057 states have internal predecessors, (20043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:33,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8058 states to 8058 states and 20043 transitions. [2022-03-15 16:42:33,045 INFO L78 Accepts]: Start accepts. Automaton has 8058 states and 20043 transitions. Word has length 30 [2022-03-15 16:42:33,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:33,045 INFO L470 AbstractCegarLoop]: Abstraction has 8058 states and 20043 transitions. [2022-03-15 16:42:33,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:33,045 INFO L276 IsEmpty]: Start isEmpty. Operand 8058 states and 20043 transitions. [2022-03-15 16:42:33,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:42:33,054 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:33,054 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:33,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-15 16:42:33,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2022-03-15 16:42:33,255 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:42:33,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:33,255 INFO L85 PathProgramCache]: Analyzing trace with hash -158977306, now seen corresponding path program 105 times [2022-03-15 16:42:33,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:33,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071059259] [2022-03-15 16:42:33,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:33,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:33,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:33,531 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:33,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071059259] [2022-03-15 16:42:33,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071059259] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:33,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596154306] [2022-03-15 16:42:33,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:42:33,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:33,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:33,532 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:33,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-15 16:42:33,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:42:33,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:33,553 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:42:33,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:34,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:34,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:34,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:34,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:34,118 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:34,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 133 [2022-03-15 16:42:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:34,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:35,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:35,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:35,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:35,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:35,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:35,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:35,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:35,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:35,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:35,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:35,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 78 treesize of output 223 [2022-03-15 16:43:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:05,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596154306] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:05,181 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:05,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 39 [2022-03-15 16:43:05,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320689908] [2022-03-15 16:43:05,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:05,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 16:43:05,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:05,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 16:43:05,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:43:05,182 INFO L87 Difference]: Start difference. First operand 8058 states and 20043 transitions. Second operand has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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) [2022-03-15 16:43:10,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:10,629 INFO L93 Difference]: Finished difference Result 11602 states and 28388 transitions. [2022-03-15 16:43:10,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-15 16:43:10,630 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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 30 [2022-03-15 16:43:10,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:10,647 INFO L225 Difference]: With dead ends: 11602 [2022-03-15 16:43:10,648 INFO L226 Difference]: Without dead ends: 11545 [2022-03-15 16:43:10,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 36 SyntacticMatches, 11 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4469 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1996, Invalid=13010, Unknown=0, NotChecked=0, Total=15006 [2022-03-15 16:43:10,649 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 295 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 2096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1024 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:10,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 420 Invalid, 2096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 971 Invalid, 0 Unknown, 1024 Unchecked, 0.5s Time] [2022-03-15 16:43:10,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11545 states. [2022-03-15 16:43:10,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11545 to 8002. [2022-03-15 16:43:10,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8002 states, 8001 states have (on average 2.4905636795400574) internal successors, (19927), 8001 states have internal predecessors, (19927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:10,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8002 states to 8002 states and 19927 transitions. [2022-03-15 16:43:10,787 INFO L78 Accepts]: Start accepts. Automaton has 8002 states and 19927 transitions. Word has length 30 [2022-03-15 16:43:10,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:10,787 INFO L470 AbstractCegarLoop]: Abstraction has 8002 states and 19927 transitions. [2022-03-15 16:43:10,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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) [2022-03-15 16:43:10,787 INFO L276 IsEmpty]: Start isEmpty. Operand 8002 states and 19927 transitions. [2022-03-15 16:43:10,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:43:10,796 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:10,796 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:10,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:10,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:10,997 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:43:10,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:10,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1739359666, now seen corresponding path program 106 times [2022-03-15 16:43:10,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:10,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788955585] [2022-03-15 16:43:10,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:10,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:11,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:11,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788955585] [2022-03-15 16:43:11,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788955585] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:11,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607032375] [2022-03-15 16:43:11,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:43:11,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:11,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:11,241 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:11,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-15 16:43:11,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:43:11,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:11,264 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:43:11,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:11,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:11,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:11,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:11,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:11,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:11,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:11,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:11,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:11,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:11,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:11,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:11,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:11,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:11,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:11,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:11,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:43:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:11,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:12,064 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:43:12,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 40 treesize of output 165 [2022-03-15 16:43:12,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:12,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:12,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:12,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:12,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:12,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:12,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:12,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:12,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:12,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:12,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:12,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:12,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:12,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:12,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:12,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:43:12,440 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:12,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607032375] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:12,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:12,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-15 16:43:12,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458890913] [2022-03-15 16:43:12,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:12,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:43:12,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:12,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:43:12,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:43:12,441 INFO L87 Difference]: Start difference. First operand 8002 states and 19927 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:14,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:14,410 INFO L93 Difference]: Finished difference Result 8930 states and 22016 transitions. [2022-03-15 16:43:14,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:43:14,410 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:43:14,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:14,424 INFO L225 Difference]: With dead ends: 8930 [2022-03-15 16:43:14,424 INFO L226 Difference]: Without dead ends: 8896 [2022-03-15 16:43:14,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=494, Invalid=3666, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 16:43:14,425 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 255 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:14,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 390 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1689 Invalid, 0 Unknown, 107 Unchecked, 0.8s Time] [2022-03-15 16:43:14,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8896 states. [2022-03-15 16:43:14,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8896 to 8392. [2022-03-15 16:43:14,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8392 states, 8391 states have (on average 2.505780002383506) internal successors, (21026), 8391 states have internal predecessors, (21026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:14,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8392 states to 8392 states and 21026 transitions. [2022-03-15 16:43:14,546 INFO L78 Accepts]: Start accepts. Automaton has 8392 states and 21026 transitions. Word has length 30 [2022-03-15 16:43:14,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:14,546 INFO L470 AbstractCegarLoop]: Abstraction has 8392 states and 21026 transitions. [2022-03-15 16:43:14,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:14,546 INFO L276 IsEmpty]: Start isEmpty. Operand 8392 states and 21026 transitions. [2022-03-15 16:43:14,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:43:14,556 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:14,556 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:14,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-15 16:43:14,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:14,756 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:43:14,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:14,757 INFO L85 PathProgramCache]: Analyzing trace with hash 335043182, now seen corresponding path program 107 times [2022-03-15 16:43:14,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:14,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516340172] [2022-03-15 16:43:14,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:14,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:15,064 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:15,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516340172] [2022-03-15 16:43:15,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516340172] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:15,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694288252] [2022-03-15 16:43:15,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:43:15,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:15,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:15,065 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:15,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:43:15,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:15,093 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:43:15,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:15,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-15 16:43:15,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:15,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:15,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:15,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:15,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:15,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:15,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:15,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:15,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:15,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:15,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:15,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:15,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:15,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:43:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:15,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:15,900 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:43:15,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:43:16,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:16,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:16,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:16,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:16,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:16,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:16,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:16,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:16,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:16,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:16,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:16,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:16,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:16,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:16,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:16,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:43:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:16,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694288252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:16,482 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:16,482 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-03-15 16:43:16,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581344812] [2022-03-15 16:43:16,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:16,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:43:16,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:16,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:43:16,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:43:16,483 INFO L87 Difference]: Start difference. First operand 8392 states and 21026 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:19,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:19,545 INFO L93 Difference]: Finished difference Result 9626 states and 23879 transitions. [2022-03-15 16:43:19,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-15 16:43:19,545 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:43:19,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:19,558 INFO L225 Difference]: With dead ends: 9626 [2022-03-15 16:43:19,558 INFO L226 Difference]: Without dead ends: 9520 [2022-03-15 16:43:19,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2068 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=912, Invalid=6228, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 16:43:19,559 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 355 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:19,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 419 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1591 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:43:19,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9520 states. [2022-03-15 16:43:19,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9520 to 8462. [2022-03-15 16:43:19,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8462 states, 8461 states have (on average 2.5004136626876257) internal successors, (21156), 8461 states have internal predecessors, (21156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:19,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8462 states to 8462 states and 21156 transitions. [2022-03-15 16:43:19,674 INFO L78 Accepts]: Start accepts. Automaton has 8462 states and 21156 transitions. Word has length 30 [2022-03-15 16:43:19,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:19,674 INFO L470 AbstractCegarLoop]: Abstraction has 8462 states and 21156 transitions. [2022-03-15 16:43:19,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:19,674 INFO L276 IsEmpty]: Start isEmpty. Operand 8462 states and 21156 transitions. [2022-03-15 16:43:19,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:43:19,683 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:19,683 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:19,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-15 16:43:19,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:19,883 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:43:19,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:19,884 INFO L85 PathProgramCache]: Analyzing trace with hash 129104750, now seen corresponding path program 108 times [2022-03-15 16:43:19,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:19,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457546379] [2022-03-15 16:43:19,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:19,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:43:20,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:20,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457546379] [2022-03-15 16:43:20,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457546379] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:20,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016510094] [2022-03-15 16:43:20,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:43:20,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:20,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:20,146 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:20,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-15 16:43:20,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:43:20,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:20,167 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 16:43:20,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:22,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:22,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:22,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:22,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:22,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:22,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:22,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:22,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:22,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 73 treesize of output 173 [2022-03-15 16:43:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:22,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:23,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:23,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:23,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:23,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:23,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:23,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:23,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:23,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 74 treesize of output 243 [2022-03-15 16:44:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:58,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016510094] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:58,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:58,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 39 [2022-03-15 16:44:58,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393836154] [2022-03-15 16:44:58,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:58,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 16:44:58,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:58,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 16:44:58,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:44:58,056 INFO L87 Difference]: Start difference. First operand 8462 states and 21156 transitions. Second operand has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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) [2022-03-15 16:45:02,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:02,762 INFO L93 Difference]: Finished difference Result 12357 states and 30466 transitions. [2022-03-15 16:45:02,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 16:45:02,763 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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 30 [2022-03-15 16:45:02,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:02,783 INFO L225 Difference]: With dead ends: 12357 [2022-03-15 16:45:02,783 INFO L226 Difference]: Without dead ends: 12313 [2022-03-15 16:45:02,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 35 SyntacticMatches, 10 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2308 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1283, Invalid=7089, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 16:45:02,784 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 249 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 963 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:02,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 280 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 726 Invalid, 0 Unknown, 963 Unchecked, 0.4s Time] [2022-03-15 16:45:02,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12313 states. [2022-03-15 16:45:02,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12313 to 8580. [2022-03-15 16:45:02,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8580 states, 8579 states have (on average 2.4991257722345264) internal successors, (21440), 8579 states have internal predecessors, (21440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:02,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8580 states to 8580 states and 21440 transitions. [2022-03-15 16:45:02,935 INFO L78 Accepts]: Start accepts. Automaton has 8580 states and 21440 transitions. Word has length 30 [2022-03-15 16:45:02,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:02,935 INFO L470 AbstractCegarLoop]: Abstraction has 8580 states and 21440 transitions. [2022-03-15 16:45:02,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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) [2022-03-15 16:45:02,935 INFO L276 IsEmpty]: Start isEmpty. Operand 8580 states and 21440 transitions. [2022-03-15 16:45:02,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:45:02,945 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:02,945 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:02,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-15 16:45:03,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-03-15 16:45:03,146 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:45:03,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:03,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1938423176, now seen corresponding path program 109 times [2022-03-15 16:45:03,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:03,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121217924] [2022-03-15 16:45:03,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:03,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:45:03,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:03,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121217924] [2022-03-15 16:45:03,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121217924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:03,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809406019] [2022-03-15 16:45:03,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:45:03,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:03,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:03,418 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:03,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-15 16:45:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:03,440 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:45:03,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:03,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:03,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:03,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:03,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:03,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:03,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:03,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:03,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:03,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:03,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:03,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:03,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:03,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:03,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:03,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:45:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:03,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:04,213 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:45:04,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:45:04,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:04,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:04,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:04,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:04,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:04,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:04,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:04,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:04,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:04,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:04,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:04,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:04,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:04,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:04,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:04,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:45:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:04,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809406019] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:04,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:04,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-03-15 16:45:04,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945549425] [2022-03-15 16:45:04,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:04,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:45:04,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:04,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:45:04,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:45:04,647 INFO L87 Difference]: Start difference. First operand 8580 states and 21440 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:07,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:07,110 INFO L93 Difference]: Finished difference Result 11014 states and 27023 transitions. [2022-03-15 16:45:07,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 16:45:07,111 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:45:07,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:07,127 INFO L225 Difference]: With dead ends: 11014 [2022-03-15 16:45:07,128 INFO L226 Difference]: Without dead ends: 10936 [2022-03-15 16:45:07,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=668, Invalid=4588, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 16:45:07,128 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 190 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:07,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 334 Invalid, 1500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1438 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:45:07,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10936 states. [2022-03-15 16:45:07,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10936 to 8750. [2022-03-15 16:45:07,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8750 states, 8749 states have (on average 2.4878271802491714) internal successors, (21766), 8749 states have internal predecessors, (21766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:07,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8750 states to 8750 states and 21766 transitions. [2022-03-15 16:45:07,264 INFO L78 Accepts]: Start accepts. Automaton has 8750 states and 21766 transitions. Word has length 30 [2022-03-15 16:45:07,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:07,264 INFO L470 AbstractCegarLoop]: Abstraction has 8750 states and 21766 transitions. [2022-03-15 16:45:07,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:07,265 INFO L276 IsEmpty]: Start isEmpty. Operand 8750 states and 21766 transitions. [2022-03-15 16:45:07,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:45:07,274 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:07,274 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:07,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-15 16:45:07,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-15 16:45:07,475 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:45:07,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:07,475 INFO L85 PathProgramCache]: Analyzing trace with hash -209232786, now seen corresponding path program 110 times [2022-03-15 16:45:07,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:07,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138577854] [2022-03-15 16:45:07,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:07,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:07,749 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:07,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138577854] [2022-03-15 16:45:07,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138577854] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:07,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873463443] [2022-03-15 16:45:07,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:45:07,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:07,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:07,751 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:07,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-15 16:45:07,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:45:07,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:07,771 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:45:07,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:08,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:08,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:08,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:08,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:08,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:08,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:08,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:08,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:08,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:08,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:08,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:08,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:08,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:08,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:08,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-15 16:45:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:08,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:08,577 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:45:08,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-15 16:45:09,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:09,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:09,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:09,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:09,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:09,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:09,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:09,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:09,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:09,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:09,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:09,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:09,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:09,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:09,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:09,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-15 16:45:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:09,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873463443] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:09,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:09,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-03-15 16:45:09,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198929537] [2022-03-15 16:45:09,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:09,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:45:09,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:09,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:45:09,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:45:09,210 INFO L87 Difference]: Start difference. First operand 8750 states and 21766 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:11,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:11,916 INFO L93 Difference]: Finished difference Result 9575 states and 23667 transitions. [2022-03-15 16:45:11,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 16:45:11,916 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:45:11,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:11,931 INFO L225 Difference]: With dead ends: 9575 [2022-03-15 16:45:11,931 INFO L226 Difference]: Without dead ends: 9555 [2022-03-15 16:45:11,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1663 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=740, Invalid=5422, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 16:45:11,932 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 252 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:11,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 246 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:45:11,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9555 states. [2022-03-15 16:45:12,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9555 to 8976. [2022-03-15 16:45:12,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8976 states, 8975 states have (on average 2.4892479108635097) internal successors, (22341), 8975 states have internal predecessors, (22341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:12,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8976 states to 8976 states and 22341 transitions. [2022-03-15 16:45:12,076 INFO L78 Accepts]: Start accepts. Automaton has 8976 states and 22341 transitions. Word has length 30 [2022-03-15 16:45:12,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:12,076 INFO L470 AbstractCegarLoop]: Abstraction has 8976 states and 22341 transitions. [2022-03-15 16:45:12,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:12,076 INFO L276 IsEmpty]: Start isEmpty. Operand 8976 states and 22341 transitions. [2022-03-15 16:45:12,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:45:12,087 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:12,087 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:12,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-15 16:45:12,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-15 16:45:12,291 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:45:12,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:12,293 INFO L85 PathProgramCache]: Analyzing trace with hash -300802278, now seen corresponding path program 111 times [2022-03-15 16:45:12,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:12,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422171715] [2022-03-15 16:45:12,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:12,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:12,395 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:12,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422171715] [2022-03-15 16:45:12,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422171715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:12,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230667862] [2022-03-15 16:45:12,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:45:12,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:12,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:12,397 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:12,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-15 16:45:12,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:45:12,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:12,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:45:12,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:12,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:12,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230667862] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:12,776 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:12,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-15 16:45:12,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945191233] [2022-03-15 16:45:12,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:12,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:45:12,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:12,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:45:12,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:45:12,777 INFO L87 Difference]: Start difference. First operand 8976 states and 22341 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:14,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:14,197 INFO L93 Difference]: Finished difference Result 10585 states and 25843 transitions. [2022-03-15 16:45:14,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-15 16:45:14,197 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:45:14,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:14,213 INFO L225 Difference]: With dead ends: 10585 [2022-03-15 16:45:14,214 INFO L226 Difference]: Without dead ends: 10585 [2022-03-15 16:45:14,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2144, Invalid=6412, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 16:45:14,215 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 284 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:14,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 178 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:45:14,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10585 states. [2022-03-15 16:45:14,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10585 to 7908. [2022-03-15 16:45:14,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7908 states, 7907 states have (on average 2.48197799418237) internal successors, (19625), 7907 states have internal predecessors, (19625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:14,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7908 states to 7908 states and 19625 transitions. [2022-03-15 16:45:14,374 INFO L78 Accepts]: Start accepts. Automaton has 7908 states and 19625 transitions. Word has length 32 [2022-03-15 16:45:14,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:14,374 INFO L470 AbstractCegarLoop]: Abstraction has 7908 states and 19625 transitions. [2022-03-15 16:45:14,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:14,374 INFO L276 IsEmpty]: Start isEmpty. Operand 7908 states and 19625 transitions. [2022-03-15 16:45:14,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:45:14,384 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:14,384 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:14,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-03-15 16:45:14,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-03-15 16:45:14,598 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:45:14,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:14,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1150918110, now seen corresponding path program 112 times [2022-03-15 16:45:14,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:14,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498625323] [2022-03-15 16:45:14,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:14,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:14,684 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:14,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498625323] [2022-03-15 16:45:14,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498625323] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:14,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215912098] [2022-03-15 16:45:14,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:45:14,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:14,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:14,685 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:14,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-15 16:45:14,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:45:14,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:14,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:45:14,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:14,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:15,054 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:15,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215912098] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:15,054 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:15,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-03-15 16:45:15,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879112652] [2022-03-15 16:45:15,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:15,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:45:15,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:15,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:45:15,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:45:15,055 INFO L87 Difference]: Start difference. First operand 7908 states and 19625 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:16,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:16,509 INFO L93 Difference]: Finished difference Result 11962 states and 29058 transitions. [2022-03-15 16:45:16,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-15 16:45:16,510 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:45:16,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:16,529 INFO L225 Difference]: With dead ends: 11962 [2022-03-15 16:45:16,529 INFO L226 Difference]: Without dead ends: 11858 [2022-03-15 16:45:16,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2503 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2122, Invalid=6434, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 16:45:16,530 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 617 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:16,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 189 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:45:16,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11858 states. [2022-03-15 16:45:16,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11858 to 8382. [2022-03-15 16:45:16,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8382 states, 8381 states have (on average 2.4921847034960027) internal successors, (20887), 8381 states have internal predecessors, (20887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:16,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8382 states to 8382 states and 20887 transitions. [2022-03-15 16:45:16,698 INFO L78 Accepts]: Start accepts. Automaton has 8382 states and 20887 transitions. Word has length 32 [2022-03-15 16:45:16,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:16,698 INFO L470 AbstractCegarLoop]: Abstraction has 8382 states and 20887 transitions. [2022-03-15 16:45:16,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:16,698 INFO L276 IsEmpty]: Start isEmpty. Operand 8382 states and 20887 transitions. [2022-03-15 16:45:16,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:45:16,728 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:16,728 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:16,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-03-15 16:45:16,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:16,929 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:45:16,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:16,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1474861086, now seen corresponding path program 113 times [2022-03-15 16:45:16,929 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:16,929 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960669863] [2022-03-15 16:45:16,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:16,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:17,000 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:17,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960669863] [2022-03-15 16:45:17,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960669863] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:17,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019718438] [2022-03-15 16:45:17,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:45:17,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:17,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:17,001 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:17,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-15 16:45:17,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:45:17,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:17,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:45:17,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:17,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:17,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019718438] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:17,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:17,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 30 [2022-03-15 16:45:17,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693519897] [2022-03-15 16:45:17,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:17,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:45:17,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:17,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:45:17,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:45:17,469 INFO L87 Difference]: Start difference. First operand 8382 states and 20887 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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) [2022-03-15 16:45:19,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:19,337 INFO L93 Difference]: Finished difference Result 14128 states and 34642 transitions. [2022-03-15 16:45:19,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-15 16:45:19,338 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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 32 [2022-03-15 16:45:19,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:19,357 INFO L225 Difference]: With dead ends: 14128 [2022-03-15 16:45:19,358 INFO L226 Difference]: Without dead ends: 14116 [2022-03-15 16:45:19,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5451 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3893, Invalid=10149, Unknown=0, NotChecked=0, Total=14042 [2022-03-15 16:45:19,359 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 498 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:19,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 244 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:45:19,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14116 states. [2022-03-15 16:45:19,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14116 to 10452. [2022-03-15 16:45:19,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10452 states, 10451 states have (on average 2.5024399578987655) internal successors, (26153), 10451 states have internal predecessors, (26153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10452 states to 10452 states and 26153 transitions. [2022-03-15 16:45:19,547 INFO L78 Accepts]: Start accepts. Automaton has 10452 states and 26153 transitions. Word has length 32 [2022-03-15 16:45:19,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:19,547 INFO L470 AbstractCegarLoop]: Abstraction has 10452 states and 26153 transitions. [2022-03-15 16:45:19,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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) [2022-03-15 16:45:19,547 INFO L276 IsEmpty]: Start isEmpty. Operand 10452 states and 26153 transitions. [2022-03-15 16:45:19,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:45:19,556 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:19,556 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:19,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-15 16:45:19,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:19,757 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:45:19,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:19,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1806539874, now seen corresponding path program 114 times [2022-03-15 16:45:19,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:19,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040450245] [2022-03-15 16:45:19,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:19,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:19,823 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:19,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040450245] [2022-03-15 16:45:19,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040450245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:19,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465508603] [2022-03-15 16:45:19,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:45:19,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:19,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:19,824 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:19,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-15 16:45:19,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 16:45:19,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:19,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:45:19,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:20,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:20,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465508603] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:20,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:20,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 29 [2022-03-15 16:45:20,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877999031] [2022-03-15 16:45:20,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:20,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:45:20,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:20,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:45:20,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:45:20,229 INFO L87 Difference]: Start difference. First operand 10452 states and 26153 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:21,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:21,184 INFO L93 Difference]: Finished difference Result 10899 states and 27011 transitions. [2022-03-15 16:45:21,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 16:45:21,185 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:45:21,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:21,201 INFO L225 Difference]: With dead ends: 10899 [2022-03-15 16:45:21,201 INFO L226 Difference]: Without dead ends: 10895 [2022-03-15 16:45:21,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1634, Invalid=4218, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 16:45:21,202 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 256 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:21,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 90 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:45:21,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10895 states. [2022-03-15 16:45:21,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10895 to 10388. [2022-03-15 16:45:21,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10388 states, 10387 states have (on average 2.502743814383364) internal successors, (25996), 10387 states have internal predecessors, (25996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:21,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10388 states to 10388 states and 25996 transitions. [2022-03-15 16:45:21,341 INFO L78 Accepts]: Start accepts. Automaton has 10388 states and 25996 transitions. Word has length 32 [2022-03-15 16:45:21,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:21,341 INFO L470 AbstractCegarLoop]: Abstraction has 10388 states and 25996 transitions. [2022-03-15 16:45:21,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:21,341 INFO L276 IsEmpty]: Start isEmpty. Operand 10388 states and 25996 transitions. [2022-03-15 16:45:21,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:45:21,352 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:21,352 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:21,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-15 16:45:21,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-03-15 16:45:21,552 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:45:21,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:21,552 INFO L85 PathProgramCache]: Analyzing trace with hash 2054156772, now seen corresponding path program 115 times [2022-03-15 16:45:21,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:21,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157656792] [2022-03-15 16:45:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:21,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:45:21,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:21,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157656792] [2022-03-15 16:45:21,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157656792] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:21,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782399392] [2022-03-15 16:45:21,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:45:21,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:21,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:21,626 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:21,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-15 16:45:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:21,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:45:21,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:21,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:22,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782399392] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:22,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:22,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 29 [2022-03-15 16:45:22,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171168754] [2022-03-15 16:45:22,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:22,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:45:22,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:22,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:45:22,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:45:22,087 INFO L87 Difference]: Start difference. First operand 10388 states and 25996 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 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) [2022-03-15 16:45:23,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:23,174 INFO L93 Difference]: Finished difference Result 13056 states and 32403 transitions. [2022-03-15 16:45:23,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 16:45:23,174 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 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 32 [2022-03-15 16:45:23,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:23,197 INFO L225 Difference]: With dead ends: 13056 [2022-03-15 16:45:23,197 INFO L226 Difference]: Without dead ends: 13041 [2022-03-15 16:45:23,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1592, Invalid=4260, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 16:45:23,198 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 441 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:23,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 132 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:45:23,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13041 states. [2022-03-15 16:45:23,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13041 to 10636. [2022-03-15 16:45:23,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10636 states, 10635 states have (on average 2.510766337564645) internal successors, (26702), 10635 states have internal predecessors, (26702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:23,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10636 states to 10636 states and 26702 transitions. [2022-03-15 16:45:23,386 INFO L78 Accepts]: Start accepts. Automaton has 10636 states and 26702 transitions. Word has length 32 [2022-03-15 16:45:23,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:23,386 INFO L470 AbstractCegarLoop]: Abstraction has 10636 states and 26702 transitions. [2022-03-15 16:45:23,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 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) [2022-03-15 16:45:23,386 INFO L276 IsEmpty]: Start isEmpty. Operand 10636 states and 26702 transitions. [2022-03-15 16:45:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:45:23,397 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:23,397 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:23,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-03-15 16:45:23,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:23,597 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:45:23,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:23,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1796277502, now seen corresponding path program 116 times [2022-03-15 16:45:23,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:23,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671039318] [2022-03-15 16:45:23,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:23,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:23,669 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:23,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671039318] [2022-03-15 16:45:23,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671039318] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:23,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024727510] [2022-03-15 16:45:23,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:45:23,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:23,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:23,671 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:23,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-15 16:45:23,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:45:23,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:23,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:45:23,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:23,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:24,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024727510] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:24,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:24,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 29 [2022-03-15 16:45:24,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674431476] [2022-03-15 16:45:24,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:24,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:45:24,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:24,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:45:24,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:45:24,081 INFO L87 Difference]: Start difference. First operand 10636 states and 26702 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:25,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:25,095 INFO L93 Difference]: Finished difference Result 11860 states and 29329 transitions. [2022-03-15 16:45:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 16:45:25,095 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:45:25,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:25,114 INFO L225 Difference]: With dead ends: 11860 [2022-03-15 16:45:25,114 INFO L226 Difference]: Without dead ends: 11844 [2022-03-15 16:45:25,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1639, Invalid=4367, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 16:45:25,115 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 249 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:25,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 151 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:45:25,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11844 states. [2022-03-15 16:45:25,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11844 to 10828. [2022-03-15 16:45:25,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10828 states, 10827 states have (on average 2.5161171146208554) internal successors, (27242), 10827 states have internal predecessors, (27242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:25,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10828 states to 10828 states and 27242 transitions. [2022-03-15 16:45:25,253 INFO L78 Accepts]: Start accepts. Automaton has 10828 states and 27242 transitions. Word has length 32 [2022-03-15 16:45:25,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:25,253 INFO L470 AbstractCegarLoop]: Abstraction has 10828 states and 27242 transitions. [2022-03-15 16:45:25,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:25,253 INFO L276 IsEmpty]: Start isEmpty. Operand 10828 states and 27242 transitions. [2022-03-15 16:45:25,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:45:25,263 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:25,263 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:25,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-03-15 16:45:25,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:25,463 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:45:25,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:25,464 INFO L85 PathProgramCache]: Analyzing trace with hash -484301822, now seen corresponding path program 117 times [2022-03-15 16:45:25,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:25,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807409200] [2022-03-15 16:45:25,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:25,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:25,547 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:25,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:25,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807409200] [2022-03-15 16:45:25,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807409200] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:25,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132790997] [2022-03-15 16:45:25,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:45:25,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:25,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:25,548 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:25,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-15 16:45:25,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-15 16:45:25,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:25,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:45:25,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:25,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:25,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132790997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:25,951 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:25,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 29 [2022-03-15 16:45:25,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217171811] [2022-03-15 16:45:25,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:25,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:45:25,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:25,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:45:25,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:45:25,951 INFO L87 Difference]: Start difference. First operand 10828 states and 27242 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:26,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:26,985 INFO L93 Difference]: Finished difference Result 12409 states and 30669 transitions. [2022-03-15 16:45:26,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:45:26,985 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:45:26,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:27,004 INFO L225 Difference]: With dead ends: 12409 [2022-03-15 16:45:27,004 INFO L226 Difference]: Without dead ends: 12383 [2022-03-15 16:45:27,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1880 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1652, Invalid=4510, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 16:45:27,005 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 273 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:27,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 175 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:45:27,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12383 states. [2022-03-15 16:45:27,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12383 to 10973. [2022-03-15 16:45:27,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10973 states, 10972 states have (on average 2.5203244622675904) internal successors, (27653), 10972 states have internal predecessors, (27653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:27,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10973 states to 10973 states and 27653 transitions. [2022-03-15 16:45:27,163 INFO L78 Accepts]: Start accepts. Automaton has 10973 states and 27653 transitions. Word has length 32 [2022-03-15 16:45:27,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:27,163 INFO L470 AbstractCegarLoop]: Abstraction has 10973 states and 27653 transitions. [2022-03-15 16:45:27,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:27,163 INFO L276 IsEmpty]: Start isEmpty. Operand 10973 states and 27653 transitions. [2022-03-15 16:45:27,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:45:27,174 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:27,174 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:27,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-15 16:45:27,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2022-03-15 16:45:27,375 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:45:27,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:27,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1898908930, now seen corresponding path program 118 times [2022-03-15 16:45:27,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:27,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387256253] [2022-03-15 16:45:27,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:27,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:27,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:27,453 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:27,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:27,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387256253] [2022-03-15 16:45:27,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387256253] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:27,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705390319] [2022-03-15 16:45:27,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:45:27,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:27,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:27,454 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:27,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-15 16:45:27,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:45:27,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:27,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:45:27,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:27,690 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:27,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:27,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705390319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:27,833 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:27,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-03-15 16:45:27,833 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282006567] [2022-03-15 16:45:27,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:27,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:45:27,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:27,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:45:27,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=653, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:45:27,834 INFO L87 Difference]: Start difference. First operand 10973 states and 27653 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:28,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:28,815 INFO L93 Difference]: Finished difference Result 12772 states and 31586 transitions. [2022-03-15 16:45:28,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 16:45:28,815 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:45:28,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:28,835 INFO L225 Difference]: With dead ends: 12772 [2022-03-15 16:45:28,836 INFO L226 Difference]: Without dead ends: 12742 [2022-03-15 16:45:28,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1970 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1673, Invalid=4647, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 16:45:28,837 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 364 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:28,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 136 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:45:28,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12742 states. [2022-03-15 16:45:28,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12742 to 9625. [2022-03-15 16:45:29,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9625 states, 9624 states have (on average 2.511118038237739) internal successors, (24167), 9624 states have internal predecessors, (24167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:29,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9625 states to 9625 states and 24167 transitions. [2022-03-15 16:45:29,020 INFO L78 Accepts]: Start accepts. Automaton has 9625 states and 24167 transitions. Word has length 32 [2022-03-15 16:45:29,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:29,020 INFO L470 AbstractCegarLoop]: Abstraction has 9625 states and 24167 transitions. [2022-03-15 16:45:29,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:29,021 INFO L276 IsEmpty]: Start isEmpty. Operand 9625 states and 24167 transitions. [2022-03-15 16:45:29,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:45:29,030 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:29,030 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:29,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-03-15 16:45:29,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-15 16:45:29,246 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:45:29,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:29,247 INFO L85 PathProgramCache]: Analyzing trace with hash 384942132, now seen corresponding path program 119 times [2022-03-15 16:45:29,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:29,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688996010] [2022-03-15 16:45:29,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:29,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:45:29,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:29,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688996010] [2022-03-15 16:45:29,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688996010] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:29,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966674825] [2022-03-15 16:45:29,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:45:29,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:29,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:29,343 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:29,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-15 16:45:29,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 16:45:29,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:29,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:45:29,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:29,585 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:29,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:29,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966674825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:29,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:29,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-15 16:45:29,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626164619] [2022-03-15 16:45:29,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:29,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:45:29,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:29,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:45:29,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:45:29,768 INFO L87 Difference]: Start difference. First operand 9625 states and 24167 transitions. Second operand has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:31,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:31,300 INFO L93 Difference]: Finished difference Result 11567 states and 28032 transitions. [2022-03-15 16:45:31,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-15 16:45:31,301 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:45:31,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:31,313 INFO L225 Difference]: With dead ends: 11567 [2022-03-15 16:45:31,313 INFO L226 Difference]: Without dead ends: 11567 [2022-03-15 16:45:31,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2891 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2368, Invalid=6944, Unknown=0, NotChecked=0, Total=9312 [2022-03-15 16:45:31,314 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 364 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:31,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 251 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:45:31,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11567 states. [2022-03-15 16:45:31,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11567 to 9011. [2022-03-15 16:45:31,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9011 states, 9010 states have (on average 2.4963374028856826) internal successors, (22492), 9010 states have internal predecessors, (22492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9011 states to 9011 states and 22492 transitions. [2022-03-15 16:45:31,442 INFO L78 Accepts]: Start accepts. Automaton has 9011 states and 22492 transitions. Word has length 32 [2022-03-15 16:45:31,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:31,442 INFO L470 AbstractCegarLoop]: Abstraction has 9011 states and 22492 transitions. [2022-03-15 16:45:31,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:31,442 INFO L276 IsEmpty]: Start isEmpty. Operand 9011 states and 22492 transitions. [2022-03-15 16:45:31,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:45:31,451 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:31,451 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:31,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-03-15 16:45:31,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-15 16:45:31,651 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:45:31,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:31,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1781805508, now seen corresponding path program 120 times [2022-03-15 16:45:31,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:31,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835584636] [2022-03-15 16:45:31,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:31,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:31,728 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:45:31,728 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:31,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835584636] [2022-03-15 16:45:31,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835584636] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:31,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624609307] [2022-03-15 16:45:31,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:45:31,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:31,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:31,729 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:31,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-15 16:45:31,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:45:31,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:31,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:45:31,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:31,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:32,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624609307] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:32,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:32,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-03-15 16:45:32,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356139796] [2022-03-15 16:45:32,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:32,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:45:32,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:32,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:45:32,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:45:32,103 INFO L87 Difference]: Start difference. First operand 9011 states and 22492 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) [2022-03-15 16:45:33,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:33,120 INFO L93 Difference]: Finished difference Result 10374 states and 25301 transitions. [2022-03-15 16:45:33,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 16:45:33,120 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 32 [2022-03-15 16:45:33,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:33,133 INFO L225 Difference]: With dead ends: 10374 [2022-03-15 16:45:33,134 INFO L226 Difference]: Without dead ends: 10308 [2022-03-15 16:45:33,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1524, Invalid=4638, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 16:45:33,134 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 404 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:33,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 159 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:45:33,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10308 states. [2022-03-15 16:45:33,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10308 to 9005. [2022-03-15 16:45:33,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9005 states, 9004 states have (on average 2.4955575299866726) internal successors, (22470), 9004 states have internal predecessors, (22470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:33,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9005 states to 9005 states and 22470 transitions. [2022-03-15 16:45:33,283 INFO L78 Accepts]: Start accepts. Automaton has 9005 states and 22470 transitions. Word has length 32 [2022-03-15 16:45:33,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:33,283 INFO L470 AbstractCegarLoop]: Abstraction has 9005 states and 22470 transitions. [2022-03-15 16:45:33,283 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) [2022-03-15 16:45:33,283 INFO L276 IsEmpty]: Start isEmpty. Operand 9005 states and 22470 transitions. [2022-03-15 16:45:33,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:45:33,292 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:33,292 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:33,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-03-15 16:45:33,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-15 16:45:33,493 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:45:33,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:33,493 INFO L85 PathProgramCache]: Analyzing trace with hash -745683916, now seen corresponding path program 121 times [2022-03-15 16:45:33,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:33,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670683808] [2022-03-15 16:45:33,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:33,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:45:33,578 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:33,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670683808] [2022-03-15 16:45:33,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670683808] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:33,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222337986] [2022-03-15 16:45:33,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:45:33,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:33,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:33,579 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:33,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-15 16:45:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:33,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:45:33,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:33,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:33,998 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:33,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222337986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:33,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:33,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2022-03-15 16:45:33,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757088477] [2022-03-15 16:45:33,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:33,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:45:33,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:33,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:45:33,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:45:33,999 INFO L87 Difference]: Start difference. First operand 9005 states and 22470 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:35,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:35,584 INFO L93 Difference]: Finished difference Result 11342 states and 27377 transitions. [2022-03-15 16:45:35,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-15 16:45:35,584 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:45:35,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:35,602 INFO L225 Difference]: With dead ends: 11342 [2022-03-15 16:45:35,603 INFO L226 Difference]: Without dead ends: 11342 [2022-03-15 16:45:35,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3866 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2919, Invalid=7793, Unknown=0, NotChecked=0, Total=10712 [2022-03-15 16:45:35,604 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 426 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:35,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 285 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:45:35,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11342 states. [2022-03-15 16:45:35,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11342 to 8307. [2022-03-15 16:45:35,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8307 states, 8306 states have (on average 2.4753190464724297) internal successors, (20560), 8306 states have internal predecessors, (20560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:35,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8307 states to 8307 states and 20560 transitions. [2022-03-15 16:45:35,779 INFO L78 Accepts]: Start accepts. Automaton has 8307 states and 20560 transitions. Word has length 32 [2022-03-15 16:45:35,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:35,779 INFO L470 AbstractCegarLoop]: Abstraction has 8307 states and 20560 transitions. [2022-03-15 16:45:35,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:35,779 INFO L276 IsEmpty]: Start isEmpty. Operand 8307 states and 20560 transitions. [2022-03-15 16:45:35,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:45:35,789 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:35,789 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:35,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-03-15 16:45:36,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:36,003 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:45:36,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:36,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1530812424, now seen corresponding path program 122 times [2022-03-15 16:45:36,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:36,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396143316] [2022-03-15 16:45:36,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:36,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:45:36,077 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:36,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396143316] [2022-03-15 16:45:36,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396143316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:36,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897130222] [2022-03-15 16:45:36,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:45:36,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:36,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:36,078 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:36,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-15 16:45:36,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:45:36,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:36,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:45:36,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:36,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:36,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897130222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:36,470 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:36,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 29 [2022-03-15 16:45:36,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520956868] [2022-03-15 16:45:36,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:36,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:45:36,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:36,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:45:36,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:45:36,471 INFO L87 Difference]: Start difference. First operand 8307 states and 20560 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:37,362 INFO L93 Difference]: Finished difference Result 10090 states and 24506 transitions. [2022-03-15 16:45:37,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:45:37,362 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:45:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:37,376 INFO L225 Difference]: With dead ends: 10090 [2022-03-15 16:45:37,376 INFO L226 Difference]: Without dead ends: 10051 [2022-03-15 16:45:37,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1362, Invalid=4040, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 16:45:37,377 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 255 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:37,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 187 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:45:37,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10051 states. [2022-03-15 16:45:37,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10051 to 8258. [2022-03-15 16:45:37,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8258 states, 8257 states have (on average 2.4717209640305198) internal successors, (20409), 8257 states have internal predecessors, (20409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:37,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8258 states to 8258 states and 20409 transitions. [2022-03-15 16:45:37,526 INFO L78 Accepts]: Start accepts. Automaton has 8258 states and 20409 transitions. Word has length 32 [2022-03-15 16:45:37,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:37,526 INFO L470 AbstractCegarLoop]: Abstraction has 8258 states and 20409 transitions. [2022-03-15 16:45:37,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:37,526 INFO L276 IsEmpty]: Start isEmpty. Operand 8258 states and 20409 transitions. [2022-03-15 16:45:37,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:45:37,534 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:37,534 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:37,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-03-15 16:45:37,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:37,735 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:45:37,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:37,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1331349556, now seen corresponding path program 123 times [2022-03-15 16:45:37,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:37,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757203960] [2022-03-15 16:45:37,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:37,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:45:37,827 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:37,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757203960] [2022-03-15 16:45:37,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757203960] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:37,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656860302] [2022-03-15 16:45:37,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:45:37,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:37,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:37,828 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:37,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-15 16:45:37,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:45:37,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:37,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:45:37,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:38,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:38,267 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:38,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656860302] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:38,268 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:38,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 30 [2022-03-15 16:45:38,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140121722] [2022-03-15 16:45:38,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:38,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:45:38,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:38,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:45:38,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:45:38,269 INFO L87 Difference]: Start difference. First operand 8258 states and 20409 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:40,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:40,134 INFO L93 Difference]: Finished difference Result 11335 states and 27281 transitions. [2022-03-15 16:45:40,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-15 16:45:40,135 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:45:40,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:40,152 INFO L225 Difference]: With dead ends: 11335 [2022-03-15 16:45:40,152 INFO L226 Difference]: Without dead ends: 11335 [2022-03-15 16:45:40,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5298 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3777, Invalid=9333, Unknown=0, NotChecked=0, Total=13110 [2022-03-15 16:45:40,154 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 517 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:40,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 311 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:45:40,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11335 states. [2022-03-15 16:45:40,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11335 to 8765. [2022-03-15 16:45:40,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8765 states, 8764 states have (on average 2.4679370150616156) internal successors, (21629), 8764 states have internal predecessors, (21629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:40,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8765 states to 8765 states and 21629 transitions. [2022-03-15 16:45:40,320 INFO L78 Accepts]: Start accepts. Automaton has 8765 states and 21629 transitions. Word has length 32 [2022-03-15 16:45:40,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:40,320 INFO L470 AbstractCegarLoop]: Abstraction has 8765 states and 21629 transitions. [2022-03-15 16:45:40,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:40,320 INFO L276 IsEmpty]: Start isEmpty. Operand 8765 states and 21629 transitions. [2022-03-15 16:45:40,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:45:40,329 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:40,329 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:40,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-03-15 16:45:40,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-03-15 16:45:40,531 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:45:40,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:40,532 INFO L85 PathProgramCache]: Analyzing trace with hash -2053455692, now seen corresponding path program 124 times [2022-03-15 16:45:40,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:40,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273663829] [2022-03-15 16:45:40,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:40,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:40,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:45:40,600 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:40,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273663829] [2022-03-15 16:45:40,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273663829] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:40,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757223135] [2022-03-15 16:45:40,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:45:40,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:40,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:40,602 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:40,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-15 16:45:40,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:45:40,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:40,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:45:40,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:40,837 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:40,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:40,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757223135] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:40,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:40,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 29 [2022-03-15 16:45:40,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701197293] [2022-03-15 16:45:40,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:40,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:45:40,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:40,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:45:40,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:45:41,000 INFO L87 Difference]: Start difference. First operand 8765 states and 21629 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:41,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:41,865 INFO L93 Difference]: Finished difference Result 9947 states and 24230 transitions. [2022-03-15 16:45:41,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 16:45:41,865 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:45:41,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:41,880 INFO L225 Difference]: With dead ends: 9947 [2022-03-15 16:45:41,880 INFO L226 Difference]: Without dead ends: 9929 [2022-03-15 16:45:41,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1295, Invalid=3675, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 16:45:41,881 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 231 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:41,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 169 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:45:41,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9929 states. [2022-03-15 16:45:41,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9929 to 8876. [2022-03-15 16:45:42,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8876 states, 8875 states have (on average 2.468732394366197) internal successors, (21910), 8875 states have internal predecessors, (21910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:42,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8876 states to 8876 states and 21910 transitions. [2022-03-15 16:45:42,045 INFO L78 Accepts]: Start accepts. Automaton has 8876 states and 21910 transitions. Word has length 32 [2022-03-15 16:45:42,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:42,045 INFO L470 AbstractCegarLoop]: Abstraction has 8876 states and 21910 transitions. [2022-03-15 16:45:42,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:42,045 INFO L276 IsEmpty]: Start isEmpty. Operand 8876 states and 21910 transitions. [2022-03-15 16:45:42,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:45:42,053 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:42,053 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:42,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-03-15 16:45:42,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-03-15 16:45:42,253 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:45:42,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:42,254 INFO L85 PathProgramCache]: Analyzing trace with hash 657899504, now seen corresponding path program 125 times [2022-03-15 16:45:42,254 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:42,254 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865609715] [2022-03-15 16:45:42,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:42,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:45:42,339 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:42,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865609715] [2022-03-15 16:45:42,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865609715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:42,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93488202] [2022-03-15 16:45:42,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:45:42,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:42,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:42,340 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:42,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-15 16:45:42,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:45:42,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:42,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:45:42,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:42,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:42,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93488202] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:42,851 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:42,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2022-03-15 16:45:42,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806836341] [2022-03-15 16:45:42,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:42,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:45:42,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:42,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:45:42,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:45:42,852 INFO L87 Difference]: Start difference. First operand 8876 states and 21910 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:45,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:45,085 INFO L93 Difference]: Finished difference Result 14408 states and 35433 transitions. [2022-03-15 16:45:45,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-15 16:45:45,086 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:45:45,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:45,110 INFO L225 Difference]: With dead ends: 14408 [2022-03-15 16:45:45,110 INFO L226 Difference]: Without dead ends: 14408 [2022-03-15 16:45:45,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7222 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4899, Invalid=12131, Unknown=0, NotChecked=0, Total=17030 [2022-03-15 16:45:45,113 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 463 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:45,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 286 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:45:45,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14408 states. [2022-03-15 16:45:45,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14408 to 12637. [2022-03-15 16:45:45,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12637 states, 12636 states have (on average 2.5214466603355494) internal successors, (31861), 12636 states have internal predecessors, (31861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:45,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12637 states to 12637 states and 31861 transitions. [2022-03-15 16:45:45,388 INFO L78 Accepts]: Start accepts. Automaton has 12637 states and 31861 transitions. Word has length 32 [2022-03-15 16:45:45,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:45,388 INFO L470 AbstractCegarLoop]: Abstraction has 12637 states and 31861 transitions. [2022-03-15 16:45:45,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:45,389 INFO L276 IsEmpty]: Start isEmpty. Operand 12637 states and 31861 transitions. [2022-03-15 16:45:45,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:45:45,399 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:45,400 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:45,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-03-15 16:45:45,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-03-15 16:45:45,600 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:45:45,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:45,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1094181720, now seen corresponding path program 126 times [2022-03-15 16:45:45,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:45,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742038752] [2022-03-15 16:45:45,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:45,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:45:45,667 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:45,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742038752] [2022-03-15 16:45:45,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742038752] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:45,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213475484] [2022-03-15 16:45:45,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:45:45,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:45,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:45,669 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:45,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-15 16:45:45,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:45:45,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:45,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:45:45,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:45,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:46,107 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:46,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213475484] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:46,107 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:46,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 29 [2022-03-15 16:45:46,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209448224] [2022-03-15 16:45:46,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:46,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:45:46,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:46,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:45:46,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:45:46,108 INFO L87 Difference]: Start difference. First operand 12637 states and 31861 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:47,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:47,524 INFO L93 Difference]: Finished difference Result 13741 states and 34101 transitions. [2022-03-15 16:45:47,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-15 16:45:47,525 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:45:47,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:47,549 INFO L225 Difference]: With dead ends: 13741 [2022-03-15 16:45:47,549 INFO L226 Difference]: Without dead ends: 13737 [2022-03-15 16:45:47,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2928 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2532, Invalid=6398, Unknown=0, NotChecked=0, Total=8930 [2022-03-15 16:45:47,550 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 453 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:47,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 109 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:45:47,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13737 states. [2022-03-15 16:45:47,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13737 to 12489. [2022-03-15 16:45:47,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12489 states, 12488 states have (on average 2.5190582959641254) internal successors, (31458), 12488 states have internal predecessors, (31458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:47,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12489 states to 12489 states and 31458 transitions. [2022-03-15 16:45:47,797 INFO L78 Accepts]: Start accepts. Automaton has 12489 states and 31458 transitions. Word has length 32 [2022-03-15 16:45:47,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:47,797 INFO L470 AbstractCegarLoop]: Abstraction has 12489 states and 31458 transitions. [2022-03-15 16:45:47,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:47,798 INFO L276 IsEmpty]: Start isEmpty. Operand 12489 states and 31458 transitions. [2022-03-15 16:45:47,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:45:47,809 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:47,809 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:47,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-03-15 16:45:48,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:48,010 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:45:48,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:48,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1600527986, now seen corresponding path program 127 times [2022-03-15 16:45:48,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:48,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901883071] [2022-03-15 16:45:48,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:48,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:45:48,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:48,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901883071] [2022-03-15 16:45:48,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901883071] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:48,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047689717] [2022-03-15 16:45:48,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:45:48,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:48,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:48,083 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:48,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-15 16:45:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:48,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:45:48,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:48,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:48,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047689717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:48,509 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:48,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 29 [2022-03-15 16:45:48,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126447286] [2022-03-15 16:45:48,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:48,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:45:48,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:48,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:45:48,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:45:48,509 INFO L87 Difference]: Start difference. First operand 12489 states and 31458 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:49,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:49,760 INFO L93 Difference]: Finished difference Result 14347 states and 35676 transitions. [2022-03-15 16:45:49,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-15 16:45:49,760 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:45:49,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:49,782 INFO L225 Difference]: With dead ends: 14347 [2022-03-15 16:45:49,782 INFO L226 Difference]: Without dead ends: 14335 [2022-03-15 16:45:49,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2173, Invalid=5659, Unknown=0, NotChecked=0, Total=7832 [2022-03-15 16:45:49,783 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 400 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:49,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 117 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:45:49,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14335 states. [2022-03-15 16:45:49,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14335 to 12923. [2022-03-15 16:45:49,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12923 states, 12922 states have (on average 2.524609193623278) internal successors, (32623), 12922 states have internal predecessors, (32623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:50,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12923 states to 12923 states and 32623 transitions. [2022-03-15 16:45:50,020 INFO L78 Accepts]: Start accepts. Automaton has 12923 states and 32623 transitions. Word has length 32 [2022-03-15 16:45:50,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:50,021 INFO L470 AbstractCegarLoop]: Abstraction has 12923 states and 32623 transitions. [2022-03-15 16:45:50,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:50,021 INFO L276 IsEmpty]: Start isEmpty. Operand 12923 states and 32623 transitions. [2022-03-15 16:45:50,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:45:50,031 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:50,031 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:50,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-03-15 16:45:50,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:50,232 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:45:50,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:50,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1827749366, now seen corresponding path program 128 times [2022-03-15 16:45:50,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:50,233 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609600563] [2022-03-15 16:45:50,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:50,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:45:50,305 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:50,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609600563] [2022-03-15 16:45:50,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609600563] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:50,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620526173] [2022-03-15 16:45:50,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:45:50,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:50,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:50,307 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:50,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-15 16:45:50,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:45:50,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:50,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:45:50,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:50,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:50,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620526173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:50,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:50,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 29 [2022-03-15 16:45:50,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497947590] [2022-03-15 16:45:50,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:50,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:45:50,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:50,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:45:50,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:45:50,698 INFO L87 Difference]: Start difference. First operand 12923 states and 32623 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:51,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:51,869 INFO L93 Difference]: Finished difference Result 15734 states and 39180 transitions. [2022-03-15 16:45:51,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 16:45:51,870 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:45:51,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:51,894 INFO L225 Difference]: With dead ends: 15734 [2022-03-15 16:45:51,894 INFO L226 Difference]: Without dead ends: 15714 [2022-03-15 16:45:51,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2255 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1999, Invalid=5311, Unknown=0, NotChecked=0, Total=7310 [2022-03-15 16:45:51,895 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 365 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:51,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 131 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:45:51,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15714 states. [2022-03-15 16:45:52,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15714 to 14459. [2022-03-15 16:45:52,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14459 states, 14458 states have (on average 2.5336837736893068) internal successors, (36632), 14458 states have internal predecessors, (36632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:52,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14459 states to 14459 states and 36632 transitions. [2022-03-15 16:45:52,160 INFO L78 Accepts]: Start accepts. Automaton has 14459 states and 36632 transitions. Word has length 32 [2022-03-15 16:45:52,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:52,161 INFO L470 AbstractCegarLoop]: Abstraction has 14459 states and 36632 transitions. [2022-03-15 16:45:52,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:52,161 INFO L276 IsEmpty]: Start isEmpty. Operand 14459 states and 36632 transitions. [2022-03-15 16:45:52,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:45:52,173 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:52,173 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:52,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-03-15 16:45:52,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2022-03-15 16:45:52,373 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:45:52,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:52,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1144163450, now seen corresponding path program 129 times [2022-03-15 16:45:52,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:52,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913654383] [2022-03-15 16:45:52,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:52,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:45:52,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:52,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913654383] [2022-03-15 16:45:52,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913654383] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:52,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750904309] [2022-03-15 16:45:52,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:45:52,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:52,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:52,452 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:52,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-15 16:45:52,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:45:52,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:52,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:45:52,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:52,692 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:52,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:52,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750904309] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:52,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:52,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-03-15 16:45:52,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179009701] [2022-03-15 16:45:52,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:52,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:45:52,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:52,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:45:52,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:45:52,835 INFO L87 Difference]: Start difference. First operand 14459 states and 36632 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:54,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:54,017 INFO L93 Difference]: Finished difference Result 17438 states and 43555 transitions. [2022-03-15 16:45:54,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 16:45:54,017 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:45:54,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:54,046 INFO L225 Difference]: With dead ends: 17438 [2022-03-15 16:45:54,046 INFO L226 Difference]: Without dead ends: 17410 [2022-03-15 16:45:54,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2263 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1968, Invalid=5342, Unknown=0, NotChecked=0, Total=7310 [2022-03-15 16:45:54,048 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 345 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:54,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 139 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:45:54,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17410 states. [2022-03-15 16:45:54,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17410 to 16063. [2022-03-15 16:45:54,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16063 states, 16062 states have (on average 2.541588843232474) internal successors, (40823), 16062 states have internal predecessors, (40823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:54,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16063 states to 16063 states and 40823 transitions. [2022-03-15 16:45:54,371 INFO L78 Accepts]: Start accepts. Automaton has 16063 states and 40823 transitions. Word has length 32 [2022-03-15 16:45:54,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:54,371 INFO L470 AbstractCegarLoop]: Abstraction has 16063 states and 40823 transitions. [2022-03-15 16:45:54,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:54,371 INFO L276 IsEmpty]: Start isEmpty. Operand 16063 states and 40823 transitions. [2022-03-15 16:45:54,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:45:54,385 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:54,385 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:54,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-03-15 16:45:54,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-15 16:45:54,585 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:45:54,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:54,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1348094462, now seen corresponding path program 130 times [2022-03-15 16:45:54,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:54,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168792589] [2022-03-15 16:45:54,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:54,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:54,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:54,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168792589] [2022-03-15 16:45:54,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168792589] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:54,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343174631] [2022-03-15 16:45:54,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:45:54,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:54,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:54,671 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:54,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-15 16:45:54,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:45:54,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:54,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:45:54,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:54,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:55,029 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:55,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343174631] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:55,029 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:55,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-03-15 16:45:55,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764037440] [2022-03-15 16:45:55,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:55,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:45:55,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:55,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:45:55,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=653, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:45:55,030 INFO L87 Difference]: Start difference. First operand 16063 states and 40823 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 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) Received shutdown request... [2022-03-15 16:45:55,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:45:55,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=480, Invalid=1412, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:45:55,276 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 78 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:55,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 27 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:45:55,277 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 16:45:55,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-03-15 16:45:55,306 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 [2022-03-15 16:45:55,324 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:45:55,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-15 16:45:55,477 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (16063states) and FLOYD_HOARE automaton (currently 18 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 44 known predicates. [2022-03-15 16:45:55,478 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 16:45:55,479 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 16:45:55,480 INFO L732 BasicCegarLoop]: Path program histogram: [130, 2, 2, 1] [2022-03-15 16:45:55,482 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 16:45:55,482 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 16:45:55,483 INFO L202 PluginConnector]: Adding new model counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 04:45:55 BasicIcfg [2022-03-15 16:45:55,483 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 16:45:55,483 INFO L158 Benchmark]: Toolchain (without parser) took 801437.16ms. Allocated memory was 199.2MB in the beginning and 859.8MB in the end (delta: 660.6MB). Free memory was 163.9MB in the beginning and 400.9MB in the end (delta: -237.0MB). Peak memory consumption was 425.7MB. Max. memory is 8.0GB. [2022-03-15 16:45:55,483 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 199.2MB. Free memory was 165.0MB in the beginning and 164.9MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:45:55,483 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.44ms. Allocated memory is still 199.2MB. Free memory was 163.8MB in the beginning and 162.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-15 16:45:55,483 INFO L158 Benchmark]: Boogie Preprocessor took 10.03ms. Allocated memory is still 199.2MB. Free memory was 162.3MB in the beginning and 161.4MB in the end (delta: 929.7kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 16:45:55,483 INFO L158 Benchmark]: RCFGBuilder took 184.71ms. Allocated memory is still 199.2MB. Free memory was 161.3MB in the beginning and 152.4MB in the end (delta: 8.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-15 16:45:55,483 INFO L158 Benchmark]: TraceAbstraction took 801219.25ms. Allocated memory was 199.2MB in the beginning and 859.8MB in the end (delta: 660.6MB). Free memory was 151.8MB in the beginning and 400.9MB in the end (delta: -249.1MB). Peak memory consumption was 413.1MB. Max. memory is 8.0GB. [2022-03-15 16:45:55,483 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 0.11ms. Allocated memory is still 199.2MB. Free memory was 165.0MB in the beginning and 164.9MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.44ms. Allocated memory is still 199.2MB. Free memory was 163.8MB in the beginning and 162.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 10.03ms. Allocated memory is still 199.2MB. Free memory was 162.3MB in the beginning and 161.4MB in the end (delta: 929.7kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 184.71ms. Allocated memory is still 199.2MB. Free memory was 161.3MB in the beginning and 152.4MB in the end (delta: 8.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 801219.25ms. Allocated memory was 199.2MB in the beginning and 859.8MB in the end (delta: 660.6MB). Free memory was 151.8MB in the beginning and 400.9MB in the end (delta: -249.1MB). Peak memory consumption was 413.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (16063states) and FLOYD_HOARE automaton (currently 18 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 44 known predicates. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (16063states) and FLOYD_HOARE automaton (currently 18 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 44 known predicates. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (16063states) and FLOYD_HOARE automaton (currently 18 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 44 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 31 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 801.1s, OverallIterations: 135, TraceHistogramMax: 5, PathProgramHistogramMax: 130, EmptinessCheckTime: 0.6s, AutomataDifference: 208.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 29784 SdHoareTripleChecker+Valid, 44.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 29784 mSDsluCounter, 25744 SdHoareTripleChecker+Invalid, 38.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 20779 IncrementalHoareTripleChecker+Unchecked, 42617 mSDsCounter, 9039 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 90056 IncrementalHoareTripleChecker+Invalid, 119874 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9039 mSolverCounterUnsat, 2331 mSDtfsCounter, 90056 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14030 GetRequests, 5035 SyntacticMatches, 572 SemanticMatches, 8422 ConstructedPredicates, 0 IntricatePredicates, 10 DeprecatedPredicates, 197463 ImplicationChecksByTransitivity, 205.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16063occurred in iteration=134, InterpolantAutomatonStates: 6432, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 8.2s AutomataMinimizationTime, 134 MinimizatonAttempts, 126125 StatesRemovedByMinimization, 134 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 552.8s InterpolantComputationTime, 7238 NumberOfCodeBlocks, 7238 NumberOfCodeBlocksAsserted, 547 NumberOfCheckSat, 10429 ConstructedInterpolants, 583 QuantifiedInterpolants, 189441 SizeOfPredicates, 882 NumberOfNonLiveVariables, 8053 ConjunctsInSsa, 2895 ConjunctsInUnsatCore, 397 InterpolantComputations, 5 PerfectInterpolantSequences, 2159/9618 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