/usr/bin/java -Xmx16000000000 -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-Separate.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-dev-bc79526 [2022-01-18 16:40:00,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 16:40:00,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 16:40:00,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 16:40:00,801 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-Separate.epf [2022-01-18 16:40:00,833 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 16:40:00,833 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 16:40:00,833 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 16:40:00,834 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 16:40:00,834 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 16:40:00,834 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 16:40:00,835 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 16:40:00,835 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 16:40:00,835 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 16:40:00,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 16:40:00,836 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 16:40:00,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 16:40:00,836 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 16:40:00,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 16:40:00,837 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 16:40:00,837 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 16:40:00,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 16:40:00,837 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 16:40:00,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 16:40:00,837 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 16:40:00,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 16:40:00,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 16:40:00,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 16:40:00,838 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 16:40:00,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 16:40:00,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:40:00,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 16:40:00,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 16:40:00,839 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 16:40:00,839 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 16:40:00,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 16:40:00,840 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 16:40:00,840 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 16:40:00,840 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 16:40:00,840 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 16:40:01,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 16:40:01,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 16:40:01,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 16:40:01,083 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 16:40:01,084 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 16:40:01,085 INFO L432 ainManager$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 [2022-01-18 16:40:01,085 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl' [2022-01-18 16:40:01,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 16:40:01,114 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 16:40:01,116 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 16:40:01,116 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 16:40:01,116 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 16:40:01,128 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 18.01 04:40:01" (1/1) ... [2022-01-18 16:40:01,139 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 18.01 04:40:01" (1/1) ... [2022-01-18 16:40:01,145 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 16:40:01,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 16:40:01,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 16:40:01,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 16:40:01,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 16:40:01,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:40:01" (1/1) ... [2022-01-18 16:40:01,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:40:01" (1/1) ... [2022-01-18 16:40:01,155 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:40:01" (1/1) ... [2022-01-18 16:40:01,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:40:01" (1/1) ... [2022-01-18 16:40:01,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:40:01" (1/1) ... [2022-01-18 16:40:01,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:40:01" (1/1) ... [2022-01-18 16:40:01,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:40:01" (1/1) ... [2022-01-18 16:40:01,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 16:40:01,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 16:40:01,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 16:40:01,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 16:40:01,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:40:01" (1/1) ... [2022-01-18 16:40:01,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:40:01,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:01,196 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) [2022-01-18 16:40:01,203 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 [2022-01-18 16:40:01,223 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 16:40:01,223 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 16:40:01,223 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 16:40:01,224 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 16:40:01,224 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 16:40:01,224 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 16:40:01,224 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 16:40:01,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 16:40:01,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 16:40:01,225 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 16:40:01,271 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 16:40:01,272 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 16:40:01,337 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 16:40:01,347 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 16:40:01,348 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 16:40:01,349 INFO L202 PluginConnector]: Adding new model counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:40:01 BoogieIcfgContainer [2022-01-18 16:40:01,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 16:40:01,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 16:40:01,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 16:40:01,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 16:40:01,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:40:01" (1/2) ... [2022-01-18 16:40:01,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73cbb253 and model type counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 04:40:01, skipping insertion in model container [2022-01-18 16:40:01,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:40:01" (2/2) ... [2022-01-18 16:40:01,360 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-queue.wvr.bpl [2022-01-18 16:40:01,368 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 16:40:01,368 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 16:40:01,368 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 16:40:01,368 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 16:40:01,392 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 16:40:01,428 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 16:40:01,434 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, 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 [2022-01-18 16:40:01,434 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 16:40:01,441 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2022-01-18 16:40:01,454 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) [2022-01-18 16:40:01,456 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) [2022-01-18 16:40:01,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 16:40:01,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:01,461 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:01,462 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:01,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:01,466 INFO L85 PathProgramCache]: Analyzing trace with hash 160243872, now seen corresponding path program 1 times [2022-01-18 16:40:01,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:01,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988091310] [2022-01-18 16:40:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:01,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:01,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:01,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988091310] [2022-01-18 16:40:01,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988091310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:40:01,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:40:01,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 16:40:01,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226710926] [2022-01-18 16:40:01,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:40:01,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 16:40:01,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:01,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 16:40:01,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:40:01,614 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) [2022-01-18 16:40:01,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:01,643 INFO L93 Difference]: Finished difference Result 57 states and 105 transitions. [2022-01-18 16:40:01,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 16:40:01,645 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 [2022-01-18 16:40:01,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:01,652 INFO L225 Difference]: With dead ends: 57 [2022-01-18 16:40:01,653 INFO L226 Difference]: Without dead ends: 50 [2022-01-18 16:40:01,654 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 [2022-01-18 16:40:01,657 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 [2022-01-18 16:40:01,658 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] [2022-01-18 16:40:01,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-18 16:40:01,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-01-18 16:40:01,685 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) [2022-01-18 16:40:01,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 74 transitions. [2022-01-18 16:40:01,687 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 74 transitions. Word has length 14 [2022-01-18 16:40:01,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:01,688 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 74 transitions. [2022-01-18 16:40:01,688 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) [2022-01-18 16:40:01,688 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 74 transitions. [2022-01-18 16:40:01,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 16:40:01,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:01,689 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:01,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 16:40:01,689 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:01,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:01,690 INFO L85 PathProgramCache]: Analyzing trace with hash 2122570142, now seen corresponding path program 1 times [2022-01-18 16:40:01,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:01,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540703324] [2022-01-18 16:40:01,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:01,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:01,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:01,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:01,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540703324] [2022-01-18 16:40:01,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540703324] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:01,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283676833] [2022-01-18 16:40:01,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:01,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:01,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:01,899 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) [2022-01-18 16:40:01,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 16:40:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:01,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 16:40:01,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:02,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:02,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:02,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283676833] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:02,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 16:40:02,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2022-01-18 16:40:02,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538882379] [2022-01-18 16:40:02,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:40:02,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 16:40:02,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:02,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 16:40:02,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-18 16:40:02,200 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) [2022-01-18 16:40:02,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:02,341 INFO L93 Difference]: Finished difference Result 76 states and 130 transitions. [2022-01-18 16:40:02,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 16:40:02,342 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 [2022-01-18 16:40:02,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:02,348 INFO L225 Difference]: With dead ends: 76 [2022-01-18 16:40:02,348 INFO L226 Difference]: Without dead ends: 76 [2022-01-18 16:40:02,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:40:02,352 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, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:40:02,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 33 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:40:02,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-18 16:40:02,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 41. [2022-01-18 16:40:02,366 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) [2022-01-18 16:40:02,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2022-01-18 16:40:02,367 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 16 [2022-01-18 16:40:02,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:02,367 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2022-01-18 16:40:02,367 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) [2022-01-18 16:40:02,367 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2022-01-18 16:40:02,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 16:40:02,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:02,368 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:02,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:02,569 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 [2022-01-18 16:40:02,569 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:02,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:02,570 INFO L85 PathProgramCache]: Analyzing trace with hash 834689058, now seen corresponding path program 1 times [2022-01-18 16:40:02,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:02,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969363683] [2022-01-18 16:40:02,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:02,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:02,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:02,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969363683] [2022-01-18 16:40:02,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969363683] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:40:02,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:40:02,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 16:40:02,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381383840] [2022-01-18 16:40:02,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:40:02,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 16:40:02,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:02,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 16:40:02,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:40:02,632 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) [2022-01-18 16:40:02,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:02,729 INFO L93 Difference]: Finished difference Result 71 states and 125 transitions. [2022-01-18 16:40:02,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 16:40:02,730 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 [2022-01-18 16:40:02,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:02,731 INFO L225 Difference]: With dead ends: 71 [2022-01-18 16:40:02,731 INFO L226 Difference]: Without dead ends: 66 [2022-01-18 16:40:02,731 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 [2022-01-18 16:40:02,732 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, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:40:02,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 31 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:40:02,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-18 16:40:02,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2022-01-18 16:40:02,738 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) [2022-01-18 16:40:02,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 91 transitions. [2022-01-18 16:40:02,739 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 91 transitions. Word has length 16 [2022-01-18 16:40:02,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:02,740 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 91 transitions. [2022-01-18 16:40:02,740 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) [2022-01-18 16:40:02,740 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 91 transitions. [2022-01-18 16:40:02,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 16:40:02,741 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:02,741 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:02,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 16:40:02,742 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:02,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:02,742 INFO L85 PathProgramCache]: Analyzing trace with hash -999603742, now seen corresponding path program 2 times [2022-01-18 16:40:02,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:02,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207216427] [2022-01-18 16:40:02,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:02,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:02,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:02,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207216427] [2022-01-18 16:40:02,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207216427] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:40:02,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:40:02,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 16:40:02,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471358] [2022-01-18 16:40:02,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:40:02,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 16:40:02,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:02,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 16:40:02,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:40:02,800 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) [2022-01-18 16:40:02,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:02,877 INFO L93 Difference]: Finished difference Result 51 states and 94 transitions. [2022-01-18 16:40:02,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 16:40:02,878 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 [2022-01-18 16:40:02,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:02,880 INFO L225 Difference]: With dead ends: 51 [2022-01-18 16:40:02,880 INFO L226 Difference]: Without dead ends: 51 [2022-01-18 16:40:02,883 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 [2022-01-18 16:40:02,884 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 [2022-01-18 16:40:02,884 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] [2022-01-18 16:40:02,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-18 16:40:02,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2022-01-18 16:40:02,890 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) [2022-01-18 16:40:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 79 transitions. [2022-01-18 16:40:02,891 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 79 transitions. Word has length 16 [2022-01-18 16:40:02,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:02,891 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 79 transitions. [2022-01-18 16:40:02,891 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) [2022-01-18 16:40:02,891 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 79 transitions. [2022-01-18 16:40:02,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 16:40:02,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:02,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:02,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 16:40:02,892 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:02,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:02,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1331282530, now seen corresponding path program 2 times [2022-01-18 16:40:02,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:02,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146629735] [2022-01-18 16:40:02,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:02,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:02,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:02,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146629735] [2022-01-18 16:40:02,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146629735] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:40:02,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:40:02,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 16:40:02,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045920419] [2022-01-18 16:40:02,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:40:02,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 16:40:02,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:02,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 16:40:02,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:40:02,966 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) [2022-01-18 16:40:03,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:03,029 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2022-01-18 16:40:03,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 16:40:03,029 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 [2022-01-18 16:40:03,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:03,031 INFO L225 Difference]: With dead ends: 51 [2022-01-18 16:40:03,031 INFO L226 Difference]: Without dead ends: 49 [2022-01-18 16:40:03,031 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 [2022-01-18 16:40:03,033 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 [2022-01-18 16:40:03,034 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] [2022-01-18 16:40:03,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-18 16:40:03,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2022-01-18 16:40:03,043 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) [2022-01-18 16:40:03,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 78 transitions. [2022-01-18 16:40:03,045 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 78 transitions. Word has length 16 [2022-01-18 16:40:03,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:03,045 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 78 transitions. [2022-01-18 16:40:03,047 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) [2022-01-18 16:40:03,048 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 78 transitions. [2022-01-18 16:40:03,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 16:40:03,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:03,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:03,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 16:40:03,053 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:03,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:03,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1139591584, now seen corresponding path program 1 times [2022-01-18 16:40:03,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:03,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870776658] [2022-01-18 16:40:03,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:03,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:03,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:03,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:03,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870776658] [2022-01-18 16:40:03,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870776658] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:03,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893675769] [2022-01-18 16:40:03,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:03,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:03,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:03,212 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) [2022-01-18 16:40:03,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 16:40:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:03,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 16:40:03,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:03,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:03,518 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 [2022-01-18 16:40:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:03,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:03,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:03,621 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 [2022-01-18 16:40:03,641 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 [2022-01-18 16:40:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:03,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893675769] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:03,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:03,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-01-18 16:40:03,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443383110] [2022-01-18 16:40:03,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:03,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 16:40:03,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:03,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 16:40:03,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:40:03,693 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) [2022-01-18 16:40:03,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:03,740 INFO L93 Difference]: Finished difference Result 84 states and 161 transitions. [2022-01-18 16:40:03,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 16:40:03,741 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 [2022-01-18 16:40:03,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:03,742 INFO L225 Difference]: With dead ends: 84 [2022-01-18 16:40:03,742 INFO L226 Difference]: Without dead ends: 77 [2022-01-18 16:40:03,743 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 [2022-01-18 16:40:03,745 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 [2022-01-18 16:40:03,746 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] [2022-01-18 16:40:03,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-18 16:40:03,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 57. [2022-01-18 16:40:03,758 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) [2022-01-18 16:40:03,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 110 transitions. [2022-01-18 16:40:03,758 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 110 transitions. Word has length 18 [2022-01-18 16:40:03,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:03,759 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 110 transitions. [2022-01-18 16:40:03,759 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) [2022-01-18 16:40:03,759 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 110 transitions. [2022-01-18 16:40:03,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 16:40:03,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:03,760 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:03,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:03,988 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 [2022-01-18 16:40:03,989 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:03,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:03,989 INFO L85 PathProgramCache]: Analyzing trace with hash -2098687768, now seen corresponding path program 2 times [2022-01-18 16:40:03,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:03,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510704153] [2022-01-18 16:40:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:03,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:04,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:04,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:04,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510704153] [2022-01-18 16:40:04,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510704153] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:04,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886863905] [2022-01-18 16:40:04,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:40:04,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:04,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:04,083 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) [2022-01-18 16:40:04,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 16:40:04,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:40:04,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:04,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 16:40:04,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:04,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:04,318 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 [2022-01-18 16:40:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:04,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:04,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:04,404 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 [2022-01-18 16:40:04,417 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 [2022-01-18 16:40:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:04,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886863905] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:04,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:04,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-01-18 16:40:04,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950161493] [2022-01-18 16:40:04,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:04,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 16:40:04,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:04,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 16:40:04,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:40:04,471 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) [2022-01-18 16:40:04,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:04,500 INFO L93 Difference]: Finished difference Result 82 states and 153 transitions. [2022-01-18 16:40:04,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 16:40:04,501 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 [2022-01-18 16:40:04,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:04,502 INFO L225 Difference]: With dead ends: 82 [2022-01-18 16:40:04,502 INFO L226 Difference]: Without dead ends: 79 [2022-01-18 16:40:04,502 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 [2022-01-18 16:40:04,503 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 [2022-01-18 16:40:04,503 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] [2022-01-18 16:40:04,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-18 16:40:04,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2022-01-18 16:40:04,512 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) [2022-01-18 16:40:04,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2022-01-18 16:40:04,512 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 18 [2022-01-18 16:40:04,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:04,513 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2022-01-18 16:40:04,513 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) [2022-01-18 16:40:04,513 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2022-01-18 16:40:04,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 16:40:04,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:04,514 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:04,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:04,714 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 [2022-01-18 16:40:04,714 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:04,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:04,715 INFO L85 PathProgramCache]: Analyzing trace with hash 402122286, now seen corresponding path program 3 times [2022-01-18 16:40:04,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:04,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923259513] [2022-01-18 16:40:04,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:04,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:04,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:04,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923259513] [2022-01-18 16:40:04,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923259513] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:04,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870431556] [2022-01-18 16:40:04,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:40:04,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:04,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:04,813 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) [2022-01-18 16:40:04,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 16:40:04,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 16:40:04,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:04,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 16:40:04,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:04,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:04,956 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 [2022-01-18 16:40:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:04,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:05,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:05,035 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 [2022-01-18 16:40:05,050 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 [2022-01-18 16:40:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:05,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870431556] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:05,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:05,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-01-18 16:40:05,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905916436] [2022-01-18 16:40:05,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:05,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 16:40:05,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:05,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 16:40:05,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:40:05,115 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) [2022-01-18 16:40:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:05,160 INFO L93 Difference]: Finished difference Result 94 states and 180 transitions. [2022-01-18 16:40:05,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 16:40:05,160 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 [2022-01-18 16:40:05,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:05,161 INFO L225 Difference]: With dead ends: 94 [2022-01-18 16:40:05,161 INFO L226 Difference]: Without dead ends: 87 [2022-01-18 16:40:05,161 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 [2022-01-18 16:40:05,162 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 [2022-01-18 16:40:05,162 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] [2022-01-18 16:40:05,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-18 16:40:05,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 65. [2022-01-18 16:40:05,165 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) [2022-01-18 16:40:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 124 transitions. [2022-01-18 16:40:05,166 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 124 transitions. Word has length 18 [2022-01-18 16:40:05,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:05,167 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 124 transitions. [2022-01-18 16:40:05,167 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) [2022-01-18 16:40:05,167 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 124 transitions. [2022-01-18 16:40:05,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 16:40:05,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:05,168 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:05,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:05,383 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 [2022-01-18 16:40:05,384 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:05,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:05,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2093142942, now seen corresponding path program 4 times [2022-01-18 16:40:05,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:05,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112264774] [2022-01-18 16:40:05,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:05,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:05,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:05,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112264774] [2022-01-18 16:40:05,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112264774] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:05,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487522044] [2022-01-18 16:40:05,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:40:05,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:05,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:05,463 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) [2022-01-18 16:40:05,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 16:40:05,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:40:05,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:05,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:40:05,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:05,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:05,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:05,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487522044] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:05,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:05,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-01-18 16:40:05,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625773639] [2022-01-18 16:40:05,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:05,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 16:40:05,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:05,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 16:40:05,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:40:05,699 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) [2022-01-18 16:40:06,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:06,117 INFO L93 Difference]: Finished difference Result 189 states and 352 transitions. [2022-01-18 16:40:06,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 16:40:06,118 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 [2022-01-18 16:40:06,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:06,119 INFO L225 Difference]: With dead ends: 189 [2022-01-18 16:40:06,119 INFO L226 Difference]: Without dead ends: 189 [2022-01-18 16:40:06,119 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 [2022-01-18 16:40:06,120 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, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:40:06,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 143 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:40:06,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-18 16:40:06,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 73. [2022-01-18 16:40:06,124 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) [2022-01-18 16:40:06,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 150 transitions. [2022-01-18 16:40:06,125 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 150 transitions. Word has length 20 [2022-01-18 16:40:06,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:06,125 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 150 transitions. [2022-01-18 16:40:06,125 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) [2022-01-18 16:40:06,125 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 150 transitions. [2022-01-18 16:40:06,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 16:40:06,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:06,126 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:06,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:06,339 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 [2022-01-18 16:40:06,340 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:06,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:06,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1390002466, now seen corresponding path program 5 times [2022-01-18 16:40:06,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:06,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499367985] [2022-01-18 16:40:06,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:06,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:06,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:06,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:06,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499367985] [2022-01-18 16:40:06,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499367985] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:06,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800870097] [2022-01-18 16:40:06,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:40:06,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:06,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:06,406 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) [2022-01-18 16:40:06,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 16:40:06,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:40:06,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:06,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:40:06,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:06,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:06,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:06,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800870097] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:06,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:06,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 16:40:06,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620166156] [2022-01-18 16:40:06,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:06,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 16:40:06,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:06,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 16:40:06,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:40:06,604 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) [2022-01-18 16:40:06,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:06,915 INFO L93 Difference]: Finished difference Result 219 states and 406 transitions. [2022-01-18 16:40:06,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 16:40:06,916 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 [2022-01-18 16:40:06,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:06,917 INFO L225 Difference]: With dead ends: 219 [2022-01-18 16:40:06,917 INFO L226 Difference]: Without dead ends: 205 [2022-01-18 16:40:06,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2022-01-18 16:40:06,918 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 [2022-01-18 16:40:06,918 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] [2022-01-18 16:40:06,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-18 16:40:06,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 102. [2022-01-18 16:40:06,922 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) [2022-01-18 16:40:06,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 216 transitions. [2022-01-18 16:40:06,922 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 216 transitions. Word has length 20 [2022-01-18 16:40:06,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:06,923 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 216 transitions. [2022-01-18 16:40:06,923 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) [2022-01-18 16:40:06,926 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 216 transitions. [2022-01-18 16:40:06,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 16:40:06,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:06,933 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:06,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:07,146 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 [2022-01-18 16:40:07,146 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:07,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:07,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1979372002, now seen corresponding path program 6 times [2022-01-18 16:40:07,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:07,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251077678] [2022-01-18 16:40:07,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:07,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:07,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:07,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251077678] [2022-01-18 16:40:07,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251077678] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:07,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977833340] [2022-01-18 16:40:07,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:40:07,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:07,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:07,212 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) [2022-01-18 16:40:07,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 16:40:07,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:40:07,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:07,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:40:07,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:07,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:07,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977833340] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:07,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:07,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-18 16:40:07,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510312400] [2022-01-18 16:40:07,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:07,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 16:40:07,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:07,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 16:40:07,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:40:07,490 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) [2022-01-18 16:40:07,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:07,861 INFO L93 Difference]: Finished difference Result 245 states and 455 transitions. [2022-01-18 16:40:07,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 16:40:07,861 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 [2022-01-18 16:40:07,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:07,862 INFO L225 Difference]: With dead ends: 245 [2022-01-18 16:40:07,863 INFO L226 Difference]: Without dead ends: 245 [2022-01-18 16:40:07,863 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 [2022-01-18 16:40:07,864 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 [2022-01-18 16:40:07,864 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] [2022-01-18 16:40:07,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-01-18 16:40:07,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 118. [2022-01-18 16:40:07,872 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) [2022-01-18 16:40:07,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 258 transitions. [2022-01-18 16:40:07,873 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 258 transitions. Word has length 20 [2022-01-18 16:40:07,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:07,874 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 258 transitions. [2022-01-18 16:40:07,874 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) [2022-01-18 16:40:07,874 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 258 transitions. [2022-01-18 16:40:07,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 16:40:07,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:07,876 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:07,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:08,095 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 [2022-01-18 16:40:08,096 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:08,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:08,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1647693214, now seen corresponding path program 7 times [2022-01-18 16:40:08,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:08,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865986474] [2022-01-18 16:40:08,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:08,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:08,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:08,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:08,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865986474] [2022-01-18 16:40:08,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865986474] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:08,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933153674] [2022-01-18 16:40:08,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:40:08,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:08,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:08,152 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) [2022-01-18 16:40:08,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 16:40:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:08,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:40:08,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:08,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:08,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933153674] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:08,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:08,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-01-18 16:40:08,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264472089] [2022-01-18 16:40:08,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:08,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 16:40:08,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:08,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 16:40:08,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:40:08,389 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) [2022-01-18 16:40:08,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:08,670 INFO L93 Difference]: Finished difference Result 205 states and 416 transitions. [2022-01-18 16:40:08,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 16:40:08,670 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 [2022-01-18 16:40:08,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:08,671 INFO L225 Difference]: With dead ends: 205 [2022-01-18 16:40:08,671 INFO L226 Difference]: Without dead ends: 203 [2022-01-18 16:40:08,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:40:08,672 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 [2022-01-18 16:40:08,672 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] [2022-01-18 16:40:08,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-18 16:40:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 120. [2022-01-18 16:40:08,677 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) [2022-01-18 16:40:08,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 260 transitions. [2022-01-18 16:40:08,677 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 260 transitions. Word has length 20 [2022-01-18 16:40:08,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:08,678 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 260 transitions. [2022-01-18 16:40:08,678 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) [2022-01-18 16:40:08,678 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 260 transitions. [2022-01-18 16:40:08,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 16:40:08,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:08,678 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:08,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:08,899 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 [2022-01-18 16:40:08,899 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:08,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:08,900 INFO L85 PathProgramCache]: Analyzing trace with hash -240395856, now seen corresponding path program 8 times [2022-01-18 16:40:08,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:08,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796983187] [2022-01-18 16:40:08,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:08,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:40:08,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:08,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796983187] [2022-01-18 16:40:08,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796983187] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:08,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781126767] [2022-01-18 16:40:08,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:40:08,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:08,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:08,967 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) [2022-01-18 16:40:08,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 16:40:09,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:40:09,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:09,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:40:09,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:09,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:09,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:09,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781126767] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:09,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:09,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-18 16:40:09,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18551557] [2022-01-18 16:40:09,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:09,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 16:40:09,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:09,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 16:40:09,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:40:09,231 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) [2022-01-18 16:40:09,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:09,704 INFO L93 Difference]: Finished difference Result 351 states and 688 transitions. [2022-01-18 16:40:09,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 16:40:09,705 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 [2022-01-18 16:40:09,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:09,706 INFO L225 Difference]: With dead ends: 351 [2022-01-18 16:40:09,707 INFO L226 Difference]: Without dead ends: 351 [2022-01-18 16:40:09,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=434, Invalid=972, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 16:40:09,708 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, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:40:09,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 131 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:40:09,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-01-18 16:40:09,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 165. [2022-01-18 16:40:09,713 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) [2022-01-18 16:40:09,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 376 transitions. [2022-01-18 16:40:09,714 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 376 transitions. Word has length 20 [2022-01-18 16:40:09,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:09,714 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 376 transitions. [2022-01-18 16:40:09,715 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) [2022-01-18 16:40:09,715 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 376 transitions. [2022-01-18 16:40:09,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 16:40:09,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:09,718 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:09,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:09,941 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 [2022-01-18 16:40:09,941 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:09,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:09,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1351610928, now seen corresponding path program 9 times [2022-01-18 16:40:09,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:09,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782764851] [2022-01-18 16:40:09,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:09,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:40:09,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:09,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782764851] [2022-01-18 16:40:09,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782764851] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:09,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657014237] [2022-01-18 16:40:09,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:40:09,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:09,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:09,988 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) [2022-01-18 16:40:09,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 16:40:10,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 16:40:10,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:10,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:40:10,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:10,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:10,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:10,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657014237] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:10,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:10,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-01-18 16:40:10,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721977091] [2022-01-18 16:40:10,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:10,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 16:40:10,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:10,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 16:40:10,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:40:10,245 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) [2022-01-18 16:40:10,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:10,488 INFO L93 Difference]: Finished difference Result 238 states and 512 transitions. [2022-01-18 16:40:10,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 16:40:10,489 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 [2022-01-18 16:40:10,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:10,490 INFO L225 Difference]: With dead ends: 238 [2022-01-18 16:40:10,490 INFO L226 Difference]: Without dead ends: 235 [2022-01-18 16:40:10,491 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 [2022-01-18 16:40:10,491 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 [2022-01-18 16:40:10,492 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] [2022-01-18 16:40:10,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-01-18 16:40:10,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 183. [2022-01-18 16:40:10,497 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) [2022-01-18 16:40:10,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 426 transitions. [2022-01-18 16:40:10,498 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 426 transitions. Word has length 20 [2022-01-18 16:40:10,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:10,498 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 426 transitions. [2022-01-18 16:40:10,498 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) [2022-01-18 16:40:10,498 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 426 transitions. [2022-01-18 16:40:10,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 16:40:10,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:10,499 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:10,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-18 16:40:10,715 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 [2022-01-18 16:40:10,715 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:10,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:10,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1992477080, now seen corresponding path program 10 times [2022-01-18 16:40:10,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:10,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770968682] [2022-01-18 16:40:10,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:10,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:10,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:40:10,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:10,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770968682] [2022-01-18 16:40:10,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770968682] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:10,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587155770] [2022-01-18 16:40:10,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:40:10,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:10,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:10,768 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) [2022-01-18 16:40:10,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 16:40:10,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:40:10,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:10,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:40:10,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:10,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:10,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:10,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587155770] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:10,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:10,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-01-18 16:40:10,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975540870] [2022-01-18 16:40:10,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:10,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 16:40:10,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:10,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 16:40:10,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:40:10,994 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) [2022-01-18 16:40:11,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:11,348 INFO L93 Difference]: Finished difference Result 302 states and 633 transitions. [2022-01-18 16:40:11,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 16:40:11,348 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 [2022-01-18 16:40:11,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:11,349 INFO L225 Difference]: With dead ends: 302 [2022-01-18 16:40:11,349 INFO L226 Difference]: Without dead ends: 300 [2022-01-18 16:40:11,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=683, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:40:11,350 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 [2022-01-18 16:40:11,351 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] [2022-01-18 16:40:11,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-01-18 16:40:11,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 183. [2022-01-18 16:40:11,356 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) [2022-01-18 16:40:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 425 transitions. [2022-01-18 16:40:11,357 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 425 transitions. Word has length 20 [2022-01-18 16:40:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:11,357 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 425 transitions. [2022-01-18 16:40:11,358 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) [2022-01-18 16:40:11,358 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 425 transitions. [2022-01-18 16:40:11,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 16:40:11,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:11,358 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:11,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:11,571 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 [2022-01-18 16:40:11,571 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:11,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:11,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1796143950, now seen corresponding path program 11 times [2022-01-18 16:40:11,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:11,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151505182] [2022-01-18 16:40:11,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:11,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:11,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:11,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:11,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151505182] [2022-01-18 16:40:11,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151505182] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:11,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846616099] [2022-01-18 16:40:11,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:40:11,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:11,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:11,635 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) [2022-01-18 16:40:11,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 16:40:11,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:40:11,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:11,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:40:11,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:11,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:11,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846616099] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:11,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:11,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 16:40:11,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360956750] [2022-01-18 16:40:11,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:11,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 16:40:11,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:11,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 16:40:11,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:40:11,876 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) [2022-01-18 16:40:12,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:12,145 INFO L93 Difference]: Finished difference Result 302 states and 642 transitions. [2022-01-18 16:40:12,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 16:40:12,145 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 [2022-01-18 16:40:12,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:12,147 INFO L225 Difference]: With dead ends: 302 [2022-01-18 16:40:12,147 INFO L226 Difference]: Without dead ends: 296 [2022-01-18 16:40:12,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:40:12,148 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 [2022-01-18 16:40:12,148 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] [2022-01-18 16:40:12,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-18 16:40:12,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 198. [2022-01-18 16:40:12,154 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) [2022-01-18 16:40:12,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 460 transitions. [2022-01-18 16:40:12,155 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 460 transitions. Word has length 20 [2022-01-18 16:40:12,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:12,155 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 460 transitions. [2022-01-18 16:40:12,155 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) [2022-01-18 16:40:12,155 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 460 transitions. [2022-01-18 16:40:12,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 16:40:12,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:12,156 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:12,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-18 16:40:12,372 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 [2022-01-18 16:40:12,372 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:12,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:12,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1370143840, now seen corresponding path program 12 times [2022-01-18 16:40:12,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:12,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354077563] [2022-01-18 16:40:12,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:12,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:12,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:12,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354077563] [2022-01-18 16:40:12,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354077563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:12,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481203658] [2022-01-18 16:40:12,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:40:12,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:12,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:12,489 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) [2022-01-18 16:40:12,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 16:40:12,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:40:12,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:12,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:40:12,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:12,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:12,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:12,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:12,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:12,760 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 [2022-01-18 16:40:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:12,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:12,909 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:40:12,909 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 [2022-01-18 16:40:12,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:12,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:12,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:12,973 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 [2022-01-18 16:40:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:13,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481203658] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:13,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:13,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 16:40:13,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768803814] [2022-01-18 16:40:13,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:13,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 16:40:13,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:13,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 16:40:13,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 16:40:13,014 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) [2022-01-18 16:40:13,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:13,099 INFO L93 Difference]: Finished difference Result 270 states and 611 transitions. [2022-01-18 16:40:13,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 16:40:13,100 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 [2022-01-18 16:40:13,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:13,101 INFO L225 Difference]: With dead ends: 270 [2022-01-18 16:40:13,101 INFO L226 Difference]: Without dead ends: 254 [2022-01-18 16:40:13,101 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 [2022-01-18 16:40:13,102 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 [2022-01-18 16:40:13,102 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] [2022-01-18 16:40:13,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-18 16:40:13,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 221. [2022-01-18 16:40:13,107 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) [2022-01-18 16:40:13,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 514 transitions. [2022-01-18 16:40:13,108 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 514 transitions. Word has length 22 [2022-01-18 16:40:13,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:13,108 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 514 transitions. [2022-01-18 16:40:13,108 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) [2022-01-18 16:40:13,108 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 514 transitions. [2022-01-18 16:40:13,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 16:40:13,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:13,109 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:13,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:13,331 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 [2022-01-18 16:40:13,332 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:13,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:13,332 INFO L85 PathProgramCache]: Analyzing trace with hash -313455896, now seen corresponding path program 13 times [2022-01-18 16:40:13,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:13,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868071418] [2022-01-18 16:40:13,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:13,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:13,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:13,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868071418] [2022-01-18 16:40:13,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868071418] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:13,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141213498] [2022-01-18 16:40:13,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:40:13,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:13,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:13,455 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) [2022-01-18 16:40:13,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 16:40:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:13,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:40:13,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:13,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:13,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:13,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:13,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:13,777 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 [2022-01-18 16:40:13,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:13,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:13,926 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:40:13,926 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 [2022-01-18 16:40:13,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:13,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:13,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:13,975 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 [2022-01-18 16:40:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:14,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141213498] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:14,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:14,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 16:40:14,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828181792] [2022-01-18 16:40:14,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:14,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 16:40:14,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:14,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 16:40:14,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 16:40:14,033 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) [2022-01-18 16:40:14,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:14,113 INFO L93 Difference]: Finished difference Result 263 states and 589 transitions. [2022-01-18 16:40:14,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 16:40:14,113 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 [2022-01-18 16:40:14,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:14,115 INFO L225 Difference]: With dead ends: 263 [2022-01-18 16:40:14,115 INFO L226 Difference]: Without dead ends: 253 [2022-01-18 16:40:14,115 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 [2022-01-18 16:40:14,115 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 56 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-01-18 16:40:14,116 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] [2022-01-18 16:40:14,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-18 16:40:14,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 212. [2022-01-18 16:40:14,121 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) [2022-01-18 16:40:14,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 497 transitions. [2022-01-18 16:40:14,122 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 497 transitions. Word has length 22 [2022-01-18 16:40:14,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:14,122 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 497 transitions. [2022-01-18 16:40:14,122 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) [2022-01-18 16:40:14,122 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 497 transitions. [2022-01-18 16:40:14,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 16:40:14,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:14,123 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:14,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:14,339 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 [2022-01-18 16:40:14,339 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:14,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:14,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1887689564, now seen corresponding path program 14 times [2022-01-18 16:40:14,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:14,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776314701] [2022-01-18 16:40:14,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:14,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:14,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:14,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776314701] [2022-01-18 16:40:14,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776314701] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:14,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558934382] [2022-01-18 16:40:14,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:40:14,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:14,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:14,451 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) [2022-01-18 16:40:14,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 16:40:14,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:40:14,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:14,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 16:40:14,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:14,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:14,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:14,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:14,985 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:14,986 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 [2022-01-18 16:40:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:15,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:15,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:15,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:15,464 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 [2022-01-18 16:40:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:16,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558934382] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:16,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:16,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-01-18 16:40:16,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721537280] [2022-01-18 16:40:16,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:16,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:40:16,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:16,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:40:16,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:40:16,033 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) [2022-01-18 16:40:16,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:16,766 INFO L93 Difference]: Finished difference Result 355 states and 801 transitions. [2022-01-18 16:40:16,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 16:40:16,766 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 [2022-01-18 16:40:16,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:16,768 INFO L225 Difference]: With dead ends: 355 [2022-01-18 16:40:16,768 INFO L226 Difference]: Without dead ends: 352 [2022-01-18 16:40:16,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=282, Invalid=1440, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:40:16,769 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, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:40:16,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 171 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 230 Invalid, 0 Unknown, 221 Unchecked, 0.2s Time] [2022-01-18 16:40:16,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-01-18 16:40:16,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 228. [2022-01-18 16:40:16,776 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) [2022-01-18 16:40:16,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 531 transitions. [2022-01-18 16:40:16,777 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 531 transitions. Word has length 22 [2022-01-18 16:40:16,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:16,777 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 531 transitions. [2022-01-18 16:40:16,777 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) [2022-01-18 16:40:16,777 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 531 transitions. [2022-01-18 16:40:16,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 16:40:16,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:16,778 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:16,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:16,978 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 [2022-01-18 16:40:16,979 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:16,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:16,979 INFO L85 PathProgramCache]: Analyzing trace with hash 816408682, now seen corresponding path program 15 times [2022-01-18 16:40:16,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:16,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861624481] [2022-01-18 16:40:16,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:16,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:17,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:17,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861624481] [2022-01-18 16:40:17,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861624481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:17,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132232986] [2022-01-18 16:40:17,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:40:17,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:17,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:17,092 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) [2022-01-18 16:40:17,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 16:40:17,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:40:17,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:17,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 16:40:17,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:17,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:17,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:17,470 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 [2022-01-18 16:40:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:17,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:18,150 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:18,150 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 [2022-01-18 16:40:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:18,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132232986] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:18,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:18,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 25 [2022-01-18 16:40:18,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637543922] [2022-01-18 16:40:18,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:18,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:40:18,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:18,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:40:18,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:40:18,967 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) [2022-01-18 16:40:20,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:20,008 INFO L93 Difference]: Finished difference Result 431 states and 961 transitions. [2022-01-18 16:40:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:40:20,008 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 [2022-01-18 16:40:20,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:20,010 INFO L225 Difference]: With dead ends: 431 [2022-01-18 16:40:20,010 INFO L226 Difference]: Without dead ends: 413 [2022-01-18 16:40:20,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=399, Invalid=2253, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 16:40:20,012 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 108 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-01-18 16:40:20,012 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] [2022-01-18 16:40:20,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-01-18 16:40:20,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 259. [2022-01-18 16:40:20,019 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) [2022-01-18 16:40:20,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 598 transitions. [2022-01-18 16:40:20,020 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 598 transitions. Word has length 22 [2022-01-18 16:40:20,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:20,020 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 598 transitions. [2022-01-18 16:40:20,020 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) [2022-01-18 16:40:20,021 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 598 transitions. [2022-01-18 16:40:20,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 16:40:20,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:20,021 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:20,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:20,235 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 [2022-01-18 16:40:20,236 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:20,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:20,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1928000206, now seen corresponding path program 16 times [2022-01-18 16:40:20,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:20,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593342799] [2022-01-18 16:40:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:20,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:20,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:20,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:20,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593342799] [2022-01-18 16:40:20,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593342799] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:20,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346039654] [2022-01-18 16:40:20,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:40:20,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:20,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:20,340 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) [2022-01-18 16:40:20,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 16:40:20,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:40:20,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:20,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:40:20,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:20,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:20,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:20,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:20,592 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 [2022-01-18 16:40:20,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:20,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:20,738 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:40:20,738 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 [2022-01-18 16:40:20,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:20,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:20,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:20,789 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 [2022-01-18 16:40:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:20,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346039654] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:20,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:20,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 16:40:20,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542251017] [2022-01-18 16:40:20,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:20,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 16:40:20,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:20,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 16:40:20,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:40:20,838 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) [2022-01-18 16:40:20,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:20,977 INFO L93 Difference]: Finished difference Result 334 states and 733 transitions. [2022-01-18 16:40:20,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 16:40:20,977 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 [2022-01-18 16:40:20,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:20,979 INFO L225 Difference]: With dead ends: 334 [2022-01-18 16:40:20,979 INFO L226 Difference]: Without dead ends: 311 [2022-01-18 16:40:20,979 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 [2022-01-18 16:40:20,979 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 [2022-01-18 16:40:20,980 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] [2022-01-18 16:40:20,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-01-18 16:40:20,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 268. [2022-01-18 16:40:20,985 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) [2022-01-18 16:40:20,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 619 transitions. [2022-01-18 16:40:20,986 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 619 transitions. Word has length 22 [2022-01-18 16:40:20,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:20,987 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 619 transitions. [2022-01-18 16:40:20,987 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) [2022-01-18 16:40:20,987 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 619 transitions. [2022-01-18 16:40:20,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 16:40:20,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:20,989 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:21,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:21,201 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 [2022-01-18 16:40:21,202 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:21,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:21,202 INFO L85 PathProgramCache]: Analyzing trace with hash -871312262, now seen corresponding path program 17 times [2022-01-18 16:40:21,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:21,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165196861] [2022-01-18 16:40:21,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:21,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:21,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:21,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:21,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165196861] [2022-01-18 16:40:21,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165196861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:21,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727708406] [2022-01-18 16:40:21,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:40:21,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:21,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:21,315 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) [2022-01-18 16:40:21,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 16:40:21,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:40:21,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:21,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:40:21,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:21,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:21,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:21,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:21,567 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 [2022-01-18 16:40:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:21,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:21,698 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:40:21,698 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 [2022-01-18 16:40:21,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:21,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:21,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:21,782 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 [2022-01-18 16:40:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:21,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727708406] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:21,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:21,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 16:40:21,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455395305] [2022-01-18 16:40:21,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:21,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 16:40:21,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:21,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 16:40:21,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:40:21,869 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) [2022-01-18 16:40:21,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:21,971 INFO L93 Difference]: Finished difference Result 329 states and 720 transitions. [2022-01-18 16:40:21,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 16:40:21,972 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 [2022-01-18 16:40:21,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:21,973 INFO L225 Difference]: With dead ends: 329 [2022-01-18 16:40:21,973 INFO L226 Difference]: Without dead ends: 326 [2022-01-18 16:40:21,973 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 [2022-01-18 16:40:21,973 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 [2022-01-18 16:40:21,974 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] [2022-01-18 16:40:21,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-01-18 16:40:21,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 264. [2022-01-18 16:40:21,979 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) [2022-01-18 16:40:21,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 611 transitions. [2022-01-18 16:40:21,980 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 611 transitions. Word has length 22 [2022-01-18 16:40:21,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:21,980 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 611 transitions. [2022-01-18 16:40:21,981 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) [2022-01-18 16:40:21,981 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 611 transitions. [2022-01-18 16:40:21,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 16:40:21,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:21,981 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:22,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:22,195 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 [2022-01-18 16:40:22,195 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:22,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:22,196 INFO L85 PathProgramCache]: Analyzing trace with hash 962650606, now seen corresponding path program 18 times [2022-01-18 16:40:22,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:22,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255424670] [2022-01-18 16:40:22,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:22,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:22,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:22,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255424670] [2022-01-18 16:40:22,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255424670] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:22,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482177071] [2022-01-18 16:40:22,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:40:22,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:22,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:22,303 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) [2022-01-18 16:40:22,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 16:40:22,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:40:22,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:22,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:40:22,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:22,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:22,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:22,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:22,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:22,519 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 [2022-01-18 16:40:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:22,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:22,645 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:40:22,645 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 [2022-01-18 16:40:22,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:22,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:22,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:22,702 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 [2022-01-18 16:40:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:22,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482177071] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:22,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:22,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 16:40:22,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269580659] [2022-01-18 16:40:22,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:22,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 16:40:22,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:22,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 16:40:22,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-01-18 16:40:22,750 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) [2022-01-18 16:40:22,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:22,881 INFO L93 Difference]: Finished difference Result 357 states and 781 transitions. [2022-01-18 16:40:22,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 16:40:22,881 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 [2022-01-18 16:40:22,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:22,883 INFO L225 Difference]: With dead ends: 357 [2022-01-18 16:40:22,883 INFO L226 Difference]: Without dead ends: 350 [2022-01-18 16:40:22,883 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 [2022-01-18 16:40:22,883 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 [2022-01-18 16:40:22,884 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] [2022-01-18 16:40:22,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-01-18 16:40:22,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 283. [2022-01-18 16:40:22,890 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) [2022-01-18 16:40:22,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 657 transitions. [2022-01-18 16:40:22,890 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 657 transitions. Word has length 22 [2022-01-18 16:40:22,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:22,891 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 657 transitions. [2022-01-18 16:40:22,891 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) [2022-01-18 16:40:22,891 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 657 transitions. [2022-01-18 16:40:22,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 16:40:22,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:22,892 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:22,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:23,107 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 [2022-01-18 16:40:23,107 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:23,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:23,107 INFO L85 PathProgramCache]: Analyzing trace with hash 419045022, now seen corresponding path program 19 times [2022-01-18 16:40:23,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:23,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427166750] [2022-01-18 16:40:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:23,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:23,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:23,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427166750] [2022-01-18 16:40:23,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427166750] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:23,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717978073] [2022-01-18 16:40:23,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:40:23,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:23,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:23,182 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) [2022-01-18 16:40:23,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 16:40:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:23,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 16:40:23,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:23,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:23,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717978073] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:23,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:23,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 16:40:23,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710051273] [2022-01-18 16:40:23,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:23,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 16:40:23,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:23,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 16:40:23,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-01-18 16:40:23,425 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) [2022-01-18 16:40:24,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:24,034 INFO L93 Difference]: Finished difference Result 565 states and 1194 transitions. [2022-01-18 16:40:24,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 16:40:24,036 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 [2022-01-18 16:40:24,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:24,038 INFO L225 Difference]: With dead ends: 565 [2022-01-18 16:40:24,038 INFO L226 Difference]: Without dead ends: 565 [2022-01-18 16:40:24,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=652, Invalid=1798, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 16:40:24,039 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 [2022-01-18 16:40:24,040 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] [2022-01-18 16:40:24,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-01-18 16:40:24,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 261. [2022-01-18 16:40:24,051 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) [2022-01-18 16:40:24,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 606 transitions. [2022-01-18 16:40:24,052 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 606 transitions. Word has length 24 [2022-01-18 16:40:24,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:24,052 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 606 transitions. [2022-01-18 16:40:24,052 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) [2022-01-18 16:40:24,052 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 606 transitions. [2022-01-18 16:40:24,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 16:40:24,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:24,053 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:24,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:24,271 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 [2022-01-18 16:40:24,271 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:24,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:24,272 INFO L85 PathProgramCache]: Analyzing trace with hash -989086942, now seen corresponding path program 20 times [2022-01-18 16:40:24,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:24,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650759844] [2022-01-18 16:40:24,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:24,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:24,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:24,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650759844] [2022-01-18 16:40:24,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650759844] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:24,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607184204] [2022-01-18 16:40:24,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:40:24,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:24,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:24,336 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) [2022-01-18 16:40:24,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 16:40:24,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:40:24,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:24,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 16:40:24,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:24,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:24,583 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:24,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607184204] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:24,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:24,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 16:40:24,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078160375] [2022-01-18 16:40:24,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:24,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:40:24,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:24,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:40:24,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:40:24,584 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) [2022-01-18 16:40:25,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:25,108 INFO L93 Difference]: Finished difference Result 727 states and 1493 transitions. [2022-01-18 16:40:25,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 16:40:25,108 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 [2022-01-18 16:40:25,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:25,110 INFO L225 Difference]: With dead ends: 727 [2022-01-18 16:40:25,110 INFO L226 Difference]: Without dead ends: 683 [2022-01-18 16:40:25,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=562, Invalid=1508, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:40:25,111 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 [2022-01-18 16:40:25,111 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] [2022-01-18 16:40:25,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-01-18 16:40:25,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 317. [2022-01-18 16:40:25,120 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) [2022-01-18 16:40:25,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 743 transitions. [2022-01-18 16:40:25,121 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 743 transitions. Word has length 24 [2022-01-18 16:40:25,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:25,121 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 743 transitions. [2022-01-18 16:40:25,121 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) [2022-01-18 16:40:25,121 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 743 transitions. [2022-01-18 16:40:25,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 16:40:25,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:25,122 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:25,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:25,344 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 [2022-01-18 16:40:25,344 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:25,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:25,345 INFO L85 PathProgramCache]: Analyzing trace with hash 867513058, now seen corresponding path program 21 times [2022-01-18 16:40:25,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:25,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417249682] [2022-01-18 16:40:25,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:25,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:25,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:25,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:25,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417249682] [2022-01-18 16:40:25,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417249682] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:25,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461157874] [2022-01-18 16:40:25,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:40:25,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:25,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:25,413 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) [2022-01-18 16:40:25,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 16:40:25,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:40:25,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:25,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 16:40:25,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:25,591 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:25,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:25,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461157874] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:25,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:25,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2022-01-18 16:40:25,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083987280] [2022-01-18 16:40:25,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:25,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 16:40:25,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:25,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 16:40:25,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-01-18 16:40:25,756 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) [2022-01-18 16:40:26,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:26,415 INFO L93 Difference]: Finished difference Result 759 states and 1599 transitions. [2022-01-18 16:40:26,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 16:40:26,415 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 [2022-01-18 16:40:26,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:26,418 INFO L225 Difference]: With dead ends: 759 [2022-01-18 16:40:26,418 INFO L226 Difference]: Without dead ends: 757 [2022-01-18 16:40:26,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=856, Invalid=2114, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 16:40:26,419 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 [2022-01-18 16:40:26,419 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] [2022-01-18 16:40:26,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-01-18 16:40:26,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 385. [2022-01-18 16:40:26,429 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) [2022-01-18 16:40:26,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 921 transitions. [2022-01-18 16:40:26,430 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 921 transitions. Word has length 24 [2022-01-18 16:40:26,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:26,430 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 921 transitions. [2022-01-18 16:40:26,430 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) [2022-01-18 16:40:26,430 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 921 transitions. [2022-01-18 16:40:26,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 16:40:26,431 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:26,431 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:26,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:26,653 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 [2022-01-18 16:40:26,654 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:26,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:26,654 INFO L85 PathProgramCache]: Analyzing trace with hash 535834270, now seen corresponding path program 22 times [2022-01-18 16:40:26,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:26,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647902854] [2022-01-18 16:40:26,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:26,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:26,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:26,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647902854] [2022-01-18 16:40:26,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647902854] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:26,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765425681] [2022-01-18 16:40:26,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:40:26,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:26,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:26,712 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) [2022-01-18 16:40:26,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 16:40:26,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:40:26,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:26,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 16:40:26,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:26,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:26,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765425681] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:26,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:26,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-01-18 16:40:26,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134667351] [2022-01-18 16:40:26,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:26,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:40:26,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:26,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:40:26,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:40:26,960 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) [2022-01-18 16:40:27,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:27,352 INFO L93 Difference]: Finished difference Result 562 states and 1252 transitions. [2022-01-18 16:40:27,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 16:40:27,353 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 [2022-01-18 16:40:27,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:27,355 INFO L225 Difference]: With dead ends: 562 [2022-01-18 16:40:27,355 INFO L226 Difference]: Without dead ends: 558 [2022-01-18 16:40:27,356 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 [2022-01-18 16:40:27,356 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 [2022-01-18 16:40:27,356 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] [2022-01-18 16:40:27,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-01-18 16:40:27,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 385. [2022-01-18 16:40:27,364 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) [2022-01-18 16:40:27,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 920 transitions. [2022-01-18 16:40:27,365 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 920 transitions. Word has length 24 [2022-01-18 16:40:27,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:27,365 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 920 transitions. [2022-01-18 16:40:27,365 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) [2022-01-18 16:40:27,366 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 920 transitions. [2022-01-18 16:40:27,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 16:40:27,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:27,366 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:27,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-18 16:40:27,571 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 [2022-01-18 16:40:27,571 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:27,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:27,572 INFO L85 PathProgramCache]: Analyzing trace with hash 48878956, now seen corresponding path program 23 times [2022-01-18 16:40:27,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:27,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522694428] [2022-01-18 16:40:27,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:27,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:40:27,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:27,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522694428] [2022-01-18 16:40:27,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522694428] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:27,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558979853] [2022-01-18 16:40:27,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:40:27,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:27,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:27,626 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) [2022-01-18 16:40:27,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 16:40:27,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:40:27,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:27,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 16:40:27,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:27,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:27,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558979853] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:27,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:27,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-01-18 16:40:27,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714359104] [2022-01-18 16:40:27,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:27,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:40:27,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:27,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:40:27,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:40:27,929 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) [2022-01-18 16:40:28,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:28,341 INFO L93 Difference]: Finished difference Result 616 states and 1364 transitions. [2022-01-18 16:40:28,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 16:40:28,341 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 [2022-01-18 16:40:28,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:28,343 INFO L225 Difference]: With dead ends: 616 [2022-01-18 16:40:28,343 INFO L226 Difference]: Without dead ends: 607 [2022-01-18 16:40:28,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=445, Invalid=1115, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:40:28,344 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 [2022-01-18 16:40:28,344 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] [2022-01-18 16:40:28,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-01-18 16:40:28,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 406. [2022-01-18 16:40:28,353 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) [2022-01-18 16:40:28,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 979 transitions. [2022-01-18 16:40:28,354 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 979 transitions. Word has length 24 [2022-01-18 16:40:28,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:28,355 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 979 transitions. [2022-01-18 16:40:28,355 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) [2022-01-18 16:40:28,355 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 979 transitions. [2022-01-18 16:40:28,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 16:40:28,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:28,356 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:28,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:28,578 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 [2022-01-18 16:40:28,579 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:28,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:28,579 INFO L85 PathProgramCache]: Analyzing trace with hash 493411978, now seen corresponding path program 24 times [2022-01-18 16:40:28,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:28,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421299602] [2022-01-18 16:40:28,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:28,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:28,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:28,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421299602] [2022-01-18 16:40:28,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421299602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:28,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709376928] [2022-01-18 16:40:28,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:40:28,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:28,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:28,635 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) [2022-01-18 16:40:28,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 16:40:28,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 16:40:28,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:28,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 16:40:28,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:28,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:28,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709376928] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:28,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:28,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 16:40:28,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736651534] [2022-01-18 16:40:28,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:28,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:40:28,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:28,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:40:28,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:40:28,911 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) [2022-01-18 16:40:29,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:29,429 INFO L93 Difference]: Finished difference Result 736 states and 1626 transitions. [2022-01-18 16:40:29,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 16:40:29,430 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 [2022-01-18 16:40:29,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:29,432 INFO L225 Difference]: With dead ends: 736 [2022-01-18 16:40:29,432 INFO L226 Difference]: Without dead ends: 722 [2022-01-18 16:40:29,432 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 [2022-01-18 16:40:29,433 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 187 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:40:29,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 97 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:40:29,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-01-18 16:40:29,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 409. [2022-01-18 16:40:29,467 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) [2022-01-18 16:40:29,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 984 transitions. [2022-01-18 16:40:29,468 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 984 transitions. Word has length 24 [2022-01-18 16:40:29,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:29,468 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 984 transitions. [2022-01-18 16:40:29,468 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) [2022-01-18 16:40:29,468 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 984 transitions. [2022-01-18 16:40:29,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 16:40:29,469 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:29,469 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:29,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:29,683 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 [2022-01-18 16:40:29,683 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:29,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:29,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1128304716, now seen corresponding path program 25 times [2022-01-18 16:40:29,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:29,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899511163] [2022-01-18 16:40:29,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:29,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:40:29,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:29,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899511163] [2022-01-18 16:40:29,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899511163] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:29,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151940732] [2022-01-18 16:40:29,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:40:29,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:29,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:29,757 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) [2022-01-18 16:40:29,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 16:40:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:29,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 16:40:29,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:29,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:30,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151940732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:30,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:30,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 16:40:30,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629366540] [2022-01-18 16:40:30,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:30,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 16:40:30,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:30,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 16:40:30,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-01-18 16:40:30,024 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) [2022-01-18 16:40:30,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:30,646 INFO L93 Difference]: Finished difference Result 923 states and 1981 transitions. [2022-01-18 16:40:30,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 16:40:30,647 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 [2022-01-18 16:40:30,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:30,649 INFO L225 Difference]: With dead ends: 923 [2022-01-18 16:40:30,649 INFO L226 Difference]: Without dead ends: 923 [2022-01-18 16:40:30,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=815, Invalid=2047, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 16:40:30,651 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 [2022-01-18 16:40:30,651 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] [2022-01-18 16:40:30,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-01-18 16:40:30,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 431. [2022-01-18 16:40:30,660 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) [2022-01-18 16:40:30,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1026 transitions. [2022-01-18 16:40:30,661 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1026 transitions. Word has length 24 [2022-01-18 16:40:30,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:30,662 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1026 transitions. [2022-01-18 16:40:30,662 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) [2022-01-18 16:40:30,662 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1026 transitions. [2022-01-18 16:40:30,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 16:40:30,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:30,663 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:30,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-18 16:40:30,871 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 [2022-01-18 16:40:30,871 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:30,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:30,871 INFO L85 PathProgramCache]: Analyzing trace with hash -218142668, now seen corresponding path program 26 times [2022-01-18 16:40:30,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:30,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248298296] [2022-01-18 16:40:30,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:30,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:40:30,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:30,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248298296] [2022-01-18 16:40:30,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248298296] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:30,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686760773] [2022-01-18 16:40:30,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:40:30,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:30,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:30,926 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) [2022-01-18 16:40:30,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 16:40:30,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:40:30,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:30,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 16:40:30,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:31,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:31,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686760773] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:31,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:31,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 16:40:31,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663208413] [2022-01-18 16:40:31,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:31,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:40:31,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:31,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:40:31,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:40:31,168 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) [2022-01-18 16:40:31,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:31,547 INFO L93 Difference]: Finished difference Result 601 states and 1312 transitions. [2022-01-18 16:40:31,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 16:40:31,548 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 [2022-01-18 16:40:31,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:31,549 INFO L225 Difference]: With dead ends: 601 [2022-01-18 16:40:31,549 INFO L226 Difference]: Without dead ends: 583 [2022-01-18 16:40:31,550 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 [2022-01-18 16:40:31,550 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 [2022-01-18 16:40:31,550 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] [2022-01-18 16:40:31,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-01-18 16:40:31,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 431. [2022-01-18 16:40:31,558 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) [2022-01-18 16:40:31,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1022 transitions. [2022-01-18 16:40:31,559 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1022 transitions. Word has length 24 [2022-01-18 16:40:31,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:31,559 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1022 transitions. [2022-01-18 16:40:31,559 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) [2022-01-18 16:40:31,559 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1022 transitions. [2022-01-18 16:40:31,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 16:40:31,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:31,560 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:31,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:31,778 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 [2022-01-18 16:40:31,778 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:31,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:31,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1556407664, now seen corresponding path program 27 times [2022-01-18 16:40:31,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:31,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768302690] [2022-01-18 16:40:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:31,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:40:31,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:31,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768302690] [2022-01-18 16:40:31,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768302690] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:31,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198983528] [2022-01-18 16:40:31,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:40:31,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:31,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:31,857 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) [2022-01-18 16:40:31,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 16:40:31,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:40:31,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:31,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 16:40:31,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:32,037 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:32,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:32,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198983528] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:32,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:32,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-01-18 16:40:32,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847369696] [2022-01-18 16:40:32,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:32,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 16:40:32,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:32,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 16:40:32,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-01-18 16:40:32,152 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) [2022-01-18 16:40:32,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:32,909 INFO L93 Difference]: Finished difference Result 1092 states and 2410 transitions. [2022-01-18 16:40:32,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 16:40:32,909 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 [2022-01-18 16:40:32,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:32,912 INFO L225 Difference]: With dead ends: 1092 [2022-01-18 16:40:32,913 INFO L226 Difference]: Without dead ends: 1092 [2022-01-18 16:40:32,914 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 [2022-01-18 16:40:32,914 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 [2022-01-18 16:40:32,914 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] [2022-01-18 16:40:32,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2022-01-18 16:40:32,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 664. [2022-01-18 16:40:32,929 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) [2022-01-18 16:40:32,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1633 transitions. [2022-01-18 16:40:32,931 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1633 transitions. Word has length 24 [2022-01-18 16:40:32,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:32,931 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1633 transitions. [2022-01-18 16:40:32,931 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) [2022-01-18 16:40:32,931 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1633 transitions. [2022-01-18 16:40:32,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 16:40:32,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:32,933 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:32,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:33,147 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 [2022-01-18 16:40:33,147 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:33,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:33,148 INFO L85 PathProgramCache]: Analyzing trace with hash -195673560, now seen corresponding path program 28 times [2022-01-18 16:40:33,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:33,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944533235] [2022-01-18 16:40:33,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:33,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:40:33,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:33,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944533235] [2022-01-18 16:40:33,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944533235] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:33,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713207437] [2022-01-18 16:40:33,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:40:33,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:33,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:33,222 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) [2022-01-18 16:40:33,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 16:40:33,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:40:33,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:33,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 16:40:33,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:33,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:33,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713207437] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:33,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:33,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-01-18 16:40:33,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679355793] [2022-01-18 16:40:33,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:33,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:40:33,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:33,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:40:33,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:40:33,476 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) [2022-01-18 16:40:34,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:34,022 INFO L93 Difference]: Finished difference Result 945 states and 2149 transitions. [2022-01-18 16:40:34,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 16:40:34,022 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 [2022-01-18 16:40:34,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:34,026 INFO L225 Difference]: With dead ends: 945 [2022-01-18 16:40:34,026 INFO L226 Difference]: Without dead ends: 941 [2022-01-18 16:40:34,027 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 [2022-01-18 16:40:34,027 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 [2022-01-18 16:40:34,027 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] [2022-01-18 16:40:34,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-01-18 16:40:34,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 664. [2022-01-18 16:40:34,039 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) [2022-01-18 16:40:34,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1630 transitions. [2022-01-18 16:40:34,040 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1630 transitions. Word has length 24 [2022-01-18 16:40:34,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:34,041 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1630 transitions. [2022-01-18 16:40:34,041 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) [2022-01-18 16:40:34,041 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1630 transitions. [2022-01-18 16:40:34,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 16:40:34,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:34,042 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:34,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:34,255 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 [2022-01-18 16:40:34,255 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:34,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:34,256 INFO L85 PathProgramCache]: Analyzing trace with hash -702019826, now seen corresponding path program 29 times [2022-01-18 16:40:34,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:34,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724697494] [2022-01-18 16:40:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:34,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:40:34,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:34,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724697494] [2022-01-18 16:40:34,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724697494] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:34,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472190671] [2022-01-18 16:40:34,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:40:34,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:34,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:34,314 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) [2022-01-18 16:40:34,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 16:40:34,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:40:34,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:34,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 16:40:34,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:34,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:34,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472190671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:34,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:34,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 16:40:34,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613815532] [2022-01-18 16:40:34,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:34,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:40:34,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:34,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:40:34,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:40:34,558 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) [2022-01-18 16:40:35,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:35,051 INFO L93 Difference]: Finished difference Result 1032 states and 2346 transitions. [2022-01-18 16:40:35,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 16:40:35,055 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 [2022-01-18 16:40:35,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:35,059 INFO L225 Difference]: With dead ends: 1032 [2022-01-18 16:40:35,059 INFO L226 Difference]: Without dead ends: 1020 [2022-01-18 16:40:35,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=657, Invalid=1599, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 16:40:35,060 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 [2022-01-18 16:40:35,061 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] [2022-01-18 16:40:35,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2022-01-18 16:40:35,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 715. [2022-01-18 16:40:35,077 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) [2022-01-18 16:40:35,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1767 transitions. [2022-01-18 16:40:35,079 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1767 transitions. Word has length 24 [2022-01-18 16:40:35,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:35,079 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 1767 transitions. [2022-01-18 16:40:35,079 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) [2022-01-18 16:40:35,079 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1767 transitions. [2022-01-18 16:40:35,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 16:40:35,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:35,081 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:35,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-18 16:40:35,303 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 [2022-01-18 16:40:35,303 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:35,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:35,303 INFO L85 PathProgramCache]: Analyzing trace with hash -929241206, now seen corresponding path program 30 times [2022-01-18 16:40:35,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:35,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959117020] [2022-01-18 16:40:35,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:35,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:35,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:35,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959117020] [2022-01-18 16:40:35,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959117020] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:35,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173658978] [2022-01-18 16:40:35,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:40:35,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:35,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:35,368 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) [2022-01-18 16:40:35,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 16:40:35,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:40:35,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:35,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 16:40:35,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:35,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:35,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173658978] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:35,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:35,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 16:40:35,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474082934] [2022-01-18 16:40:35,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:35,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:40:35,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:35,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:40:35,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:40:35,621 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) [2022-01-18 16:40:36,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:36,040 INFO L93 Difference]: Finished difference Result 1063 states and 2453 transitions. [2022-01-18 16:40:36,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 16:40:36,040 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 [2022-01-18 16:40:36,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:36,044 INFO L225 Difference]: With dead ends: 1063 [2022-01-18 16:40:36,044 INFO L226 Difference]: Without dead ends: 1043 [2022-01-18 16:40:36,045 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 [2022-01-18 16:40:36,045 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 [2022-01-18 16:40:36,045 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] [2022-01-18 16:40:36,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2022-01-18 16:40:36,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 771. [2022-01-18 16:40:36,059 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) [2022-01-18 16:40:36,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1916 transitions. [2022-01-18 16:40:36,061 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1916 transitions. Word has length 24 [2022-01-18 16:40:36,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:36,061 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 1916 transitions. [2022-01-18 16:40:36,061 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) [2022-01-18 16:40:36,061 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1916 transitions. [2022-01-18 16:40:36,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:40:36,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:36,063 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:36,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:36,283 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 [2022-01-18 16:40:36,283 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:36,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:36,284 INFO L85 PathProgramCache]: Analyzing trace with hash 434491040, now seen corresponding path program 31 times [2022-01-18 16:40:36,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:36,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522884445] [2022-01-18 16:40:36,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:36,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:36,533 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:36,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:36,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522884445] [2022-01-18 16:40:36,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522884445] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:36,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636875943] [2022-01-18 16:40:36,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:40:36,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:36,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:36,534 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) [2022-01-18 16:40:36,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 16:40:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:36,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:40:36,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:36,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:36,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:36,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:36,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:36,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:36,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:36,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:36,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:36,906 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 [2022-01-18 16:40:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:36,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:37,173 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:40:37,173 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 [2022-01-18 16:40:37,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:37,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:37,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:37,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:37,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:37,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:37,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:37,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:37,379 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 [2022-01-18 16:40:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:37,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636875943] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:37,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:37,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-01-18 16:40:37,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926219064] [2022-01-18 16:40:37,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:37,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:40:37,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:37,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:40:37,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:40:37,413 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) [2022-01-18 16:40:38,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:38,224 INFO L93 Difference]: Finished difference Result 1161 states and 2807 transitions. [2022-01-18 16:40:38,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 16:40:38,224 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 [2022-01-18 16:40:38,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:38,227 INFO L225 Difference]: With dead ends: 1161 [2022-01-18 16:40:38,227 INFO L226 Difference]: Without dead ends: 1154 [2022-01-18 16:40:38,228 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 [2022-01-18 16:40:38,228 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 [2022-01-18 16:40:38,228 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] [2022-01-18 16:40:38,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2022-01-18 16:40:38,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 819. [2022-01-18 16:40:38,241 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) [2022-01-18 16:40:38,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2023 transitions. [2022-01-18 16:40:38,243 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2023 transitions. Word has length 26 [2022-01-18 16:40:38,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:38,243 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 2023 transitions. [2022-01-18 16:40:38,243 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) [2022-01-18 16:40:38,243 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2023 transitions. [2022-01-18 16:40:38,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:40:38,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:38,245 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:38,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:38,459 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 [2022-01-18 16:40:38,459 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:38,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:38,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1491178984, now seen corresponding path program 32 times [2022-01-18 16:40:38,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:38,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076864248] [2022-01-18 16:40:38,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:38,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:38,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:38,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076864248] [2022-01-18 16:40:38,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076864248] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:38,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718216459] [2022-01-18 16:40:38,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:40:38,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:38,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:38,709 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) [2022-01-18 16:40:38,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 16:40:38,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:40:38,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:38,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:40:38,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:39,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:39,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:39,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:39,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:39,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:39,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:39,032 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 [2022-01-18 16:40:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:39,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:39,299 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:40:39,299 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 [2022-01-18 16:40:39,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:39,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:39,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:39,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:39,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:39,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:39,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:39,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:39,423 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 [2022-01-18 16:40:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:39,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718216459] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:39,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:39,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-01-18 16:40:39,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697687236] [2022-01-18 16:40:39,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:39,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:40:39,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:39,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:40:39,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:40:39,466 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) [2022-01-18 16:40:40,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:40,336 INFO L93 Difference]: Finished difference Result 1175 states and 2816 transitions. [2022-01-18 16:40:40,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 16:40:40,337 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 [2022-01-18 16:40:40,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:40,340 INFO L225 Difference]: With dead ends: 1175 [2022-01-18 16:40:40,340 INFO L226 Difference]: Without dead ends: 1172 [2022-01-18 16:40:40,341 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 [2022-01-18 16:40:40,341 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 106 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-01-18 16:40:40,341 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] [2022-01-18 16:40:40,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2022-01-18 16:40:40,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 815. [2022-01-18 16:40:40,353 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) [2022-01-18 16:40:40,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 2015 transitions. [2022-01-18 16:40:40,355 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2015 transitions. Word has length 26 [2022-01-18 16:40:40,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:40,356 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 2015 transitions. [2022-01-18 16:40:40,356 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) [2022-01-18 16:40:40,356 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 2015 transitions. [2022-01-18 16:40:40,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:40:40,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:40,357 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:40,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-18 16:40:40,567 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 [2022-01-18 16:40:40,567 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:40,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:40,568 INFO L85 PathProgramCache]: Analyzing trace with hash -83054684, now seen corresponding path program 33 times [2022-01-18 16:40:40,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:40,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895015864] [2022-01-18 16:40:40,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:40,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:40,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:40,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895015864] [2022-01-18 16:40:40,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895015864] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:40,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984364189] [2022-01-18 16:40:40,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:40:40,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:40,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:40,852 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) [2022-01-18 16:40:40,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 16:40:40,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:40:40,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:40,885 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:40:40,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:41,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:41,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:41,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:41,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:41,640 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 [2022-01-18 16:40:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:41,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:42,696 INFO L353 Elim1Store]: treesize reduction 24, result has 83.0 percent of original size [2022-01-18 16:40:42,696 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 [2022-01-18 16:40:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:46,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984364189] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:46,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:46,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 33 [2022-01-18 16:40:46,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847020086] [2022-01-18 16:40:46,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:46,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 16:40:46,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:46,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 16:40:46,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:40:46,918 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) [2022-01-18 16:40:48,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:48,002 INFO L93 Difference]: Finished difference Result 1194 states and 2858 transitions. [2022-01-18 16:40:48,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 16:40:48,003 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 [2022-01-18 16:40:48,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:48,006 INFO L225 Difference]: With dead ends: 1194 [2022-01-18 16:40:48,006 INFO L226 Difference]: Without dead ends: 1188 [2022-01-18 16:40:48,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=342, Invalid=2850, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 16:40:48,008 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 81 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-01-18 16:40:48,008 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] [2022-01-18 16:40:48,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2022-01-18 16:40:48,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 857. [2022-01-18 16:40:48,021 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) [2022-01-18 16:40:48,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2111 transitions. [2022-01-18 16:40:48,023 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2111 transitions. Word has length 26 [2022-01-18 16:40:48,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:48,024 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 2111 transitions. [2022-01-18 16:40:48,024 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) [2022-01-18 16:40:48,024 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2111 transitions. [2022-01-18 16:40:48,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:40:48,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:48,026 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:48,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:48,246 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 [2022-01-18 16:40:48,247 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:48,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:48,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1093121440, now seen corresponding path program 34 times [2022-01-18 16:40:48,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:48,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54254060] [2022-01-18 16:40:48,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:48,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:48,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:48,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54254060] [2022-01-18 16:40:48,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54254060] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:48,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866384616] [2022-01-18 16:40:48,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:40:48,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:48,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:48,567 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) [2022-01-18 16:40:48,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 16:40:48,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:40:48,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:48,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:40:48,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:48,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:48,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:48,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:48,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:48,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:48,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:48,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:48,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:48,923 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 [2022-01-18 16:40:48,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:48,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:49,174 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:40:49,174 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 [2022-01-18 16:40:49,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:49,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:49,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:49,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:49,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:49,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:49,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:49,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:49,352 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 [2022-01-18 16:40:49,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:49,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866384616] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:49,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:49,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-01-18 16:40:49,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579565381] [2022-01-18 16:40:49,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:49,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:40:49,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:49,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:40:49,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:40:49,386 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) [2022-01-18 16:40:50,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:50,373 INFO L93 Difference]: Finished difference Result 1262 states and 3022 transitions. [2022-01-18 16:40:50,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 16:40:50,373 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 [2022-01-18 16:40:50,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:50,378 INFO L225 Difference]: With dead ends: 1262 [2022-01-18 16:40:50,378 INFO L226 Difference]: Without dead ends: 1259 [2022-01-18 16:40:50,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=310, Invalid=2240, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:40:50,379 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 [2022-01-18 16:40:50,379 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] [2022-01-18 16:40:50,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-01-18 16:40:50,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 863. [2022-01-18 16:40:50,392 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) [2022-01-18 16:40:50,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2123 transitions. [2022-01-18 16:40:50,394 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2123 transitions. Word has length 26 [2022-01-18 16:40:50,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:50,394 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 2123 transitions. [2022-01-18 16:40:50,394 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) [2022-01-18 16:40:50,395 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2123 transitions. [2022-01-18 16:40:50,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:40:50,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:50,396 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:50,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-18 16:40:50,618 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 [2022-01-18 16:40:50,618 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:50,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:50,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1170935528, now seen corresponding path program 35 times [2022-01-18 16:40:50,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:50,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28705310] [2022-01-18 16:40:50,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:50,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:50,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:50,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:50,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28705310] [2022-01-18 16:40:50,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28705310] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:50,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572449458] [2022-01-18 16:40:50,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:40:50,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:50,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:50,908 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) [2022-01-18 16:40:50,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 16:40:50,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:40:50,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:50,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:40:50,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:51,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:51,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:51,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:51,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:51,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:51,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:51,275 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 [2022-01-18 16:40:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:51,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:51,528 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:40:51,529 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 [2022-01-18 16:40:51,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:51,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:51,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:51,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:51,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:51,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:51,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:51,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:51,735 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 [2022-01-18 16:40:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:51,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572449458] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:51,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:51,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-01-18 16:40:51,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322802069] [2022-01-18 16:40:51,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:51,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:40:51,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:51,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:40:51,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:40:51,771 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) [2022-01-18 16:40:52,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:52,802 INFO L93 Difference]: Finished difference Result 1252 states and 2968 transitions. [2022-01-18 16:40:52,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 16:40:52,802 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 [2022-01-18 16:40:52,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:52,805 INFO L225 Difference]: With dead ends: 1252 [2022-01-18 16:40:52,805 INFO L226 Difference]: Without dead ends: 1249 [2022-01-18 16:40:52,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=335, Invalid=2317, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 16:40:52,806 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 [2022-01-18 16:40:52,806 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] [2022-01-18 16:40:52,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2022-01-18 16:40:52,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 861. [2022-01-18 16:40:52,819 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) [2022-01-18 16:40:52,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2120 transitions. [2022-01-18 16:40:52,820 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2120 transitions. Word has length 26 [2022-01-18 16:40:52,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:52,821 INFO L470 AbstractCegarLoop]: Abstraction has 861 states and 2120 transitions. [2022-01-18 16:40:52,821 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) [2022-01-18 16:40:52,821 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2120 transitions. [2022-01-18 16:40:52,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:40:52,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:52,823 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:52,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-18 16:40:53,044 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 [2022-01-18 16:40:53,044 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:53,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:53,045 INFO L85 PathProgramCache]: Analyzing trace with hash 234980, now seen corresponding path program 36 times [2022-01-18 16:40:53,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:53,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378397061] [2022-01-18 16:40:53,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:53,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:53,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:53,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378397061] [2022-01-18 16:40:53,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378397061] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:53,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554489032] [2022-01-18 16:40:53,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:40:53,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:53,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:53,341 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) [2022-01-18 16:40:53,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 16:40:53,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:40:53,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:53,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:40:53,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:53,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:53,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:53,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:53,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:53,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:53,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:53,669 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 [2022-01-18 16:40:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:53,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:53,928 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:40:53,929 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 [2022-01-18 16:40:54,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:54,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:54,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:54,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:54,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:54,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:54,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:54,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:54,093 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 [2022-01-18 16:40:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:54,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554489032] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:54,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:54,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-01-18 16:40:54,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404269504] [2022-01-18 16:40:54,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:54,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:40:54,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:54,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:40:54,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:40:54,129 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) [2022-01-18 16:40:55,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:55,017 INFO L93 Difference]: Finished difference Result 1190 states and 2852 transitions. [2022-01-18 16:40:55,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 16:40:55,018 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 [2022-01-18 16:40:55,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:55,020 INFO L225 Difference]: With dead ends: 1190 [2022-01-18 16:40:55,020 INFO L226 Difference]: Without dead ends: 1183 [2022-01-18 16:40:55,021 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 [2022-01-18 16:40:55,021 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 [2022-01-18 16:40:55,021 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] [2022-01-18 16:40:55,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2022-01-18 16:40:55,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 868. [2022-01-18 16:40:55,032 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) [2022-01-18 16:40:55,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2141 transitions. [2022-01-18 16:40:55,034 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2141 transitions. Word has length 26 [2022-01-18 16:40:55,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:55,034 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 2141 transitions. [2022-01-18 16:40:55,034 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) [2022-01-18 16:40:55,034 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2141 transitions. [2022-01-18 16:40:55,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:40:55,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:55,036 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:55,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-01-18 16:40:55,236 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 [2022-01-18 16:40:55,236 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:55,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:55,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1008532964, now seen corresponding path program 37 times [2022-01-18 16:40:55,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:55,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147482170] [2022-01-18 16:40:55,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:55,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:55,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:55,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147482170] [2022-01-18 16:40:55,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147482170] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:55,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206894744] [2022-01-18 16:40:55,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:40:55,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:55,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:55,485 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) [2022-01-18 16:40:55,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 16:40:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:55,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:40:55,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:55,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:55,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:55,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:55,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:55,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:55,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:55,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:55,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:55,806 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 [2022-01-18 16:40:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:55,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:56,066 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:40:56,066 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 [2022-01-18 16:40:56,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:56,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:56,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:56,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:56,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:56,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:56,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:56,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:56,211 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 31 treesize of output 5 [2022-01-18 16:40:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:56,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206894744] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:56,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:56,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-01-18 16:40:56,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742198489] [2022-01-18 16:40:56,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:56,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:40:56,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:56,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:40:56,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:40:56,246 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) [2022-01-18 16:40:57,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:57,172 INFO L93 Difference]: Finished difference Result 1265 states and 3033 transitions. [2022-01-18 16:40:57,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 16:40:57,172 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 [2022-01-18 16:40:57,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:57,174 INFO L225 Difference]: With dead ends: 1265 [2022-01-18 16:40:57,174 INFO L226 Difference]: Without dead ends: 1258 [2022-01-18 16:40:57,174 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 [2022-01-18 16:40:57,175 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 [2022-01-18 16:40:57,175 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] [2022-01-18 16:40:57,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2022-01-18 16:40:57,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 900. [2022-01-18 16:40:57,201 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) [2022-01-18 16:40:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2225 transitions. [2022-01-18 16:40:57,202 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2225 transitions. Word has length 26 [2022-01-18 16:40:57,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:57,203 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 2225 transitions. [2022-01-18 16:40:57,203 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) [2022-01-18 16:40:57,203 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2225 transitions. [2022-01-18 16:40:57,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:40:57,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:57,204 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:57,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-18 16:40:57,410 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 [2022-01-18 16:40:57,411 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:57,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:57,411 INFO L85 PathProgramCache]: Analyzing trace with hash -9411100, now seen corresponding path program 38 times [2022-01-18 16:40:57,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:57,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362167751] [2022-01-18 16:40:57,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:57,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:57,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:57,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362167751] [2022-01-18 16:40:57,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362167751] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:57,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405720850] [2022-01-18 16:40:57,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:40:57,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:57,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:57,684 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) [2022-01-18 16:40:57,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 16:40:57,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:40:57,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:57,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:40:57,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:57,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:57,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:57,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:57,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:57,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:57,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:57,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:57,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:57,973 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 [2022-01-18 16:40:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:58,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:58,242 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:40:58,243 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 [2022-01-18 16:40:58,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:58,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:58,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:58,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:58,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:58,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:58,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:58,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:40:58,397 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 [2022-01-18 16:40:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:58,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405720850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:58,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:58,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-01-18 16:40:58,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189913075] [2022-01-18 16:40:58,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:58,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:40:58,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:58,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:40:58,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:40:58,434 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) [2022-01-18 16:40:59,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:59,358 INFO L93 Difference]: Finished difference Result 1181 states and 2881 transitions. [2022-01-18 16:40:59,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 16:40:59,358 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 [2022-01-18 16:40:59,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:59,360 INFO L225 Difference]: With dead ends: 1181 [2022-01-18 16:40:59,360 INFO L226 Difference]: Without dead ends: 1174 [2022-01-18 16:40:59,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=294, Invalid=1962, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 16:40:59,361 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 [2022-01-18 16:40:59,361 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] [2022-01-18 16:40:59,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2022-01-18 16:40:59,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 911. [2022-01-18 16:40:59,374 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) [2022-01-18 16:40:59,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 2260 transitions. [2022-01-18 16:40:59,376 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 2260 transitions. Word has length 26 [2022-01-18 16:40:59,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:59,376 INFO L470 AbstractCegarLoop]: Abstraction has 911 states and 2260 transitions. [2022-01-18 16:40:59,376 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) [2022-01-18 16:40:59,376 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 2260 transitions. [2022-01-18 16:40:59,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:40:59,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:59,378 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:59,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:59,600 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 [2022-01-18 16:40:59,600 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:59,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:59,600 INFO L85 PathProgramCache]: Analyzing trace with hash -2100038610, now seen corresponding path program 39 times [2022-01-18 16:40:59,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:59,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907497376] [2022-01-18 16:40:59,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:59,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:40:59,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:59,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907497376] [2022-01-18 16:40:59,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907497376] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:59,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550237623] [2022-01-18 16:40:59,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:40:59,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:59,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:59,864 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) [2022-01-18 16:40:59,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 16:40:59,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:40:59,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:59,885 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:40:59,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:41:00,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:00,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:00,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:00,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:41:00,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 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 [2022-01-18 16:41:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:00,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:41:01,502 INFO L353 Elim1Store]: treesize reduction 24, result has 83.0 percent of original size [2022-01-18 16:41:01,503 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 [2022-01-18 16:41:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:12,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550237623] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:41:12,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:41:12,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 33 [2022-01-18 16:41:12,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794491348] [2022-01-18 16:41:12,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:41:12,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 16:41:12,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:41:12,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 16:41:12,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:41:12,598 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) [2022-01-18 16:41:13,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:41:13,992 INFO L93 Difference]: Finished difference Result 1339 states and 3202 transitions. [2022-01-18 16:41:13,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 16:41:13,992 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 [2022-01-18 16:41:13,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:41:13,996 INFO L225 Difference]: With dead ends: 1339 [2022-01-18 16:41:13,996 INFO L226 Difference]: Without dead ends: 1284 [2022-01-18 16:41:13,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=421, Invalid=3119, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 16:41:13,999 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 [2022-01-18 16:41:14,000 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] [2022-01-18 16:41:14,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2022-01-18 16:41:14,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 923. [2022-01-18 16:41:14,013 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) [2022-01-18 16:41:14,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2284 transitions. [2022-01-18 16:41:14,015 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2284 transitions. Word has length 26 [2022-01-18 16:41:14,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:41:14,015 INFO L470 AbstractCegarLoop]: Abstraction has 923 states and 2284 transitions. [2022-01-18 16:41:14,015 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) [2022-01-18 16:41:14,015 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2284 transitions. [2022-01-18 16:41:14,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:41:14,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:41:14,017 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:41:14,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 16:41:14,217 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 [2022-01-18 16:41:14,217 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:41:14,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:41:14,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1232654318, now seen corresponding path program 40 times [2022-01-18 16:41:14,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:41:14,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556764995] [2022-01-18 16:41:14,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:41:14,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:41:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:41:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:14,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:41:14,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556764995] [2022-01-18 16:41:14,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556764995] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:41:14,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317886167] [2022-01-18 16:41:14,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:41:14,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:41:14,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:41:14,455 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) [2022-01-18 16:41:14,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 16:41:14,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:41:14,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:41:14,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:41:14,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:41:14,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:14,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:14,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:14,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:14,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:14,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:14,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:14,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:14,759 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 [2022-01-18 16:41:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:14,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:41:15,017 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:41:15,017 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 [2022-01-18 16:41:15,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:15,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:15,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:15,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:15,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:15,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:15,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:15,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:15,153 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 31 treesize of output 5 [2022-01-18 16:41:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:15,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317886167] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:41:15,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:41:15,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-01-18 16:41:15,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398336513] [2022-01-18 16:41:15,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:41:15,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:41:15,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:41:15,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:41:15,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:41:15,187 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) [2022-01-18 16:41:16,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:41:16,684 INFO L93 Difference]: Finished difference Result 1394 states and 3319 transitions. [2022-01-18 16:41:16,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 16:41:16,684 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 [2022-01-18 16:41:16,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:41:16,686 INFO L225 Difference]: With dead ends: 1394 [2022-01-18 16:41:16,686 INFO L226 Difference]: Without dead ends: 1309 [2022-01-18 16:41:16,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=518, Invalid=3022, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 16:41:16,686 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 [2022-01-18 16:41:16,687 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] [2022-01-18 16:41:16,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2022-01-18 16:41:16,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 975. [2022-01-18 16:41:16,700 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) [2022-01-18 16:41:16,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2389 transitions. [2022-01-18 16:41:16,702 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2389 transitions. Word has length 26 [2022-01-18 16:41:16,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:41:16,702 INFO L470 AbstractCegarLoop]: Abstraction has 975 states and 2389 transitions. [2022-01-18 16:41:16,702 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) [2022-01-18 16:41:16,702 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2389 transitions. [2022-01-18 16:41:16,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:41:16,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:41:16,704 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:41:16,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 16:41:16,911 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 [2022-01-18 16:41:16,911 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:41:16,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:41:16,912 INFO L85 PathProgramCache]: Analyzing trace with hash 715108594, now seen corresponding path program 41 times [2022-01-18 16:41:16,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:41:16,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547581307] [2022-01-18 16:41:16,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:41:16,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:41:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:41:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:17,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:41:17,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547581307] [2022-01-18 16:41:17,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547581307] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:41:17,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055917660] [2022-01-18 16:41:17,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:41:17,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:41:17,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:41:17,158 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) [2022-01-18 16:41:17,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 16:41:17,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:41:17,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:41:17,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:41:17,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:41:17,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:17,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:17,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:17,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:17,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:17,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:17,479 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 [2022-01-18 16:41:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:17,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:41:17,728 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:41:17,728 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 [2022-01-18 16:41:17,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:17,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:17,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:17,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:17,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:17,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:17,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:17,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:17,890 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 [2022-01-18 16:41:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:17,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055917660] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:41:17,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:41:17,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-01-18 16:41:17,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876247966] [2022-01-18 16:41:17,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:41:17,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:41:17,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:41:17,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:41:17,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:41:17,925 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) [2022-01-18 16:41:19,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:41:19,364 INFO L93 Difference]: Finished difference Result 1393 states and 3309 transitions. [2022-01-18 16:41:19,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 16:41:19,365 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 [2022-01-18 16:41:19,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:41:19,367 INFO L225 Difference]: With dead ends: 1393 [2022-01-18 16:41:19,367 INFO L226 Difference]: Without dead ends: 1379 [2022-01-18 16:41:19,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=530, Invalid=3252, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 16:41:19,368 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, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:41:19,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 98 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 460 Invalid, 0 Unknown, 137 Unchecked, 0.3s Time] [2022-01-18 16:41:19,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2022-01-18 16:41:19,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 970. [2022-01-18 16:41:19,379 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) [2022-01-18 16:41:19,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 2378 transitions. [2022-01-18 16:41:19,382 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 2378 transitions. Word has length 26 [2022-01-18 16:41:19,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:41:19,382 INFO L470 AbstractCegarLoop]: Abstraction has 970 states and 2378 transitions. [2022-01-18 16:41:19,382 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) [2022-01-18 16:41:19,382 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 2378 transitions. [2022-01-18 16:41:19,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:41:19,384 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:41:19,384 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:41:19,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-01-18 16:41:19,607 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 [2022-01-18 16:41:19,607 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:41:19,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:41:19,607 INFO L85 PathProgramCache]: Analyzing trace with hash -597566298, now seen corresponding path program 42 times [2022-01-18 16:41:19,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:41:19,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518369945] [2022-01-18 16:41:19,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:41:19,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:41:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:41:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:19,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:41:19,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518369945] [2022-01-18 16:41:19,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518369945] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:41:19,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465296928] [2022-01-18 16:41:19,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:41:19,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:41:19,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:41:19,863 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) [2022-01-18 16:41:19,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 16:41:19,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:41:19,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:41:19,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:41:19,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:41:20,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:20,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:20,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:20,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:20,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:20,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:20,136 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 [2022-01-18 16:41:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:20,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:41:20,396 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:41:20,397 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 [2022-01-18 16:41:20,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:20,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:20,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:20,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:20,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:20,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:20,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:20,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:20,545 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 [2022-01-18 16:41:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:20,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465296928] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:41:20,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:41:20,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-01-18 16:41:20,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536843376] [2022-01-18 16:41:20,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:41:20,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:41:20,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:41:20,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:41:20,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:41:20,580 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) [2022-01-18 16:41:22,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:41:22,386 INFO L93 Difference]: Finished difference Result 1579 states and 3725 transitions. [2022-01-18 16:41:22,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 16:41:22,386 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 [2022-01-18 16:41:22,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:41:22,388 INFO L225 Difference]: With dead ends: 1579 [2022-01-18 16:41:22,389 INFO L226 Difference]: Without dead ends: 1556 [2022-01-18 16:41:22,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=541, Invalid=3619, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 16:41:22,389 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 171 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 [2022-01-18 16:41:22,389 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] [2022-01-18 16:41:22,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2022-01-18 16:41:22,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1009. [2022-01-18 16:41:22,403 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) [2022-01-18 16:41:22,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 2480 transitions. [2022-01-18 16:41:22,405 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 2480 transitions. Word has length 26 [2022-01-18 16:41:22,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:41:22,406 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 2480 transitions. [2022-01-18 16:41:22,406 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) [2022-01-18 16:41:22,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 2480 transitions. [2022-01-18 16:41:22,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:41:22,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:41:22,407 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:41:22,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-01-18 16:41:22,611 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 [2022-01-18 16:41:22,611 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:41:22,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:41:22,612 INFO L85 PathProgramCache]: Analyzing trace with hash 707454872, now seen corresponding path program 43 times [2022-01-18 16:41:22,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:41:22,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584022250] [2022-01-18 16:41:22,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:41:22,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:41:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:41:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:22,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:41:22,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584022250] [2022-01-18 16:41:22,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584022250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:41:22,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337993945] [2022-01-18 16:41:22,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:41:22,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:41:22,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:41:22,886 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) [2022-01-18 16:41:22,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 16:41:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:41:22,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:41:22,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:41:23,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:23,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:23,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:23,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:23,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:23,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:23,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:23,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:23,189 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 [2022-01-18 16:41:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:23,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:41:23,438 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:41:23,439 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 [2022-01-18 16:41:23,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:23,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:23,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:23,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:23,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:23,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:23,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:23,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:23,568 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 [2022-01-18 16:41:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:23,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337993945] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:41:23,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:41:23,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-01-18 16:41:23,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346205533] [2022-01-18 16:41:23,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:41:23,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:41:23,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:41:23,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:41:23,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:41:23,602 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) [2022-01-18 16:41:24,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:41:24,910 INFO L93 Difference]: Finished difference Result 1387 states and 3307 transitions. [2022-01-18 16:41:24,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:41:24,910 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 [2022-01-18 16:41:24,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:41:24,912 INFO L225 Difference]: With dead ends: 1387 [2022-01-18 16:41:24,912 INFO L226 Difference]: Without dead ends: 1342 [2022-01-18 16:41:24,913 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 [2022-01-18 16:41:24,913 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 [2022-01-18 16:41:24,913 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] [2022-01-18 16:41:24,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2022-01-18 16:41:24,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 993. [2022-01-18 16:41:24,923 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) [2022-01-18 16:41:24,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 2448 transitions. [2022-01-18 16:41:24,935 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 2448 transitions. Word has length 26 [2022-01-18 16:41:24,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:41:24,935 INFO L470 AbstractCegarLoop]: Abstraction has 993 states and 2448 transitions. [2022-01-18 16:41:24,935 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) [2022-01-18 16:41:24,935 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 2448 transitions. [2022-01-18 16:41:24,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:41:24,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:41:24,936 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:41:24,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 16:41:25,136 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 [2022-01-18 16:41:25,137 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:41:25,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:41:25,137 INFO L85 PathProgramCache]: Analyzing trace with hash 277025134, now seen corresponding path program 44 times [2022-01-18 16:41:25,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:41:25,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396842574] [2022-01-18 16:41:25,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:41:25,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:41:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:41:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:25,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:41:25,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396842574] [2022-01-18 16:41:25,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396842574] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:41:25,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208770] [2022-01-18 16:41:25,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:41:25,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:41:25,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:41:25,391 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) [2022-01-18 16:41:25,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 16:41:25,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:41:25,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:41:25,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:41:25,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:41:25,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:25,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:25,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:25,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:25,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:25,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:25,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:25,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 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 [2022-01-18 16:41:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:25,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:41:25,917 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:41:25,918 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 [2022-01-18 16:41:26,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:26,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:26,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:26,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:26,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:26,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:26,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:26,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:26,058 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 [2022-01-18 16:41:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:26,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208770] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:41:26,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:41:26,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 23 [2022-01-18 16:41:26,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927260301] [2022-01-18 16:41:26,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:41:26,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 16:41:26,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:41:26,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 16:41:26,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-01-18 16:41:26,095 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) [2022-01-18 16:41:27,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:41:27,039 INFO L93 Difference]: Finished difference Result 1343 states and 3128 transitions. [2022-01-18 16:41:27,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 16:41:27,039 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 [2022-01-18 16:41:27,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:41:27,042 INFO L225 Difference]: With dead ends: 1343 [2022-01-18 16:41:27,042 INFO L226 Difference]: Without dead ends: 1285 [2022-01-18 16:41:27,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=323, Invalid=1933, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 16:41:27,043 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 [2022-01-18 16:41:27,043 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] [2022-01-18 16:41:27,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2022-01-18 16:41:27,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1081. [2022-01-18 16:41:27,059 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) [2022-01-18 16:41:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 2679 transitions. [2022-01-18 16:41:27,062 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 2679 transitions. Word has length 26 [2022-01-18 16:41:27,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:41:27,062 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 2679 transitions. [2022-01-18 16:41:27,062 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) [2022-01-18 16:41:27,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 2679 transitions. [2022-01-18 16:41:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:41:27,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:41:27,064 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:41:27,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 16:41:27,285 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 [2022-01-18 16:41:27,286 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:41:27,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:41:27,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1792998102, now seen corresponding path program 45 times [2022-01-18 16:41:27,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:41:27,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528612981] [2022-01-18 16:41:27,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:41:27,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:41:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:41:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:27,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:41:27,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528612981] [2022-01-18 16:41:27,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528612981] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:41:27,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499089191] [2022-01-18 16:41:27,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:41:27,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:41:27,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:41:27,518 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) [2022-01-18 16:41:27,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 16:41:27,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:41:27,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:41:27,539 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:41:27,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:41:27,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:27,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:27,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:27,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:27,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:27,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:27,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:41:27,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 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 [2022-01-18 16:41:28,205 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:28,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:41:28,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:28,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:28,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:28,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:28,723 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:41:28,724 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 [2022-01-18 16:41:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:31,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499089191] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:41:31,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:41:31,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 34 [2022-01-18 16:41:31,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742658968] [2022-01-18 16:41:31,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:41:31,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 16:41:31,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:41:31,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 16:41:31,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:41:31,069 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) [2022-01-18 16:41:37,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:41:37,382 INFO L93 Difference]: Finished difference Result 2055 states and 4788 transitions. [2022-01-18 16:41:37,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-18 16:41:37,382 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 [2022-01-18 16:41:37,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:41:37,390 INFO L225 Difference]: With dead ends: 2055 [2022-01-18 16:41:37,390 INFO L226 Difference]: Without dead ends: 1985 [2022-01-18 16:41:37,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 24 SyntacticMatches, 14 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5247 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2012, Invalid=12508, Unknown=0, NotChecked=0, Total=14520 [2022-01-18 16:41:37,393 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, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:41:37,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 395 Invalid, 2064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1690 Invalid, 0 Unknown, 270 Unchecked, 0.9s Time] [2022-01-18 16:41:37,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2022-01-18 16:41:37,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1177. [2022-01-18 16:41:37,418 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) [2022-01-18 16:41:37,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 2941 transitions. [2022-01-18 16:41:37,425 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 2941 transitions. Word has length 26 [2022-01-18 16:41:37,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:41:37,427 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 2941 transitions. [2022-01-18 16:41:37,427 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) [2022-01-18 16:41:37,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 2941 transitions. [2022-01-18 16:41:37,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:41:37,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:41:37,429 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:41:37,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 16:41:37,653 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 [2022-01-18 16:41:37,653 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:41:37,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:41:37,653 INFO L85 PathProgramCache]: Analyzing trace with hash 771199462, now seen corresponding path program 46 times [2022-01-18 16:41:37,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:41:37,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692668291] [2022-01-18 16:41:37,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:41:37,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:41:37,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:41:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:37,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:41:37,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692668291] [2022-01-18 16:41:37,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692668291] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:41:37,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782868823] [2022-01-18 16:41:37,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:41:37,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:41:37,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:41:37,901 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) [2022-01-18 16:41:37,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 16:41:37,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:41:37,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:41:37,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:41:37,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:41:38,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:38,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:38,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:38,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:38,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:38,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:38,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:38,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:38,173 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 [2022-01-18 16:41:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:38,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:41:38,421 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:41:38,421 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 [2022-01-18 16:41:38,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:38,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:38,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:38,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:38,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:38,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:38,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:38,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:38,623 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 [2022-01-18 16:41:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:38,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782868823] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:41:38,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:41:38,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2022-01-18 16:41:38,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318647598] [2022-01-18 16:41:38,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:41:38,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:41:38,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:41:38,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:41:38,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:41:38,658 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) [2022-01-18 16:41:40,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:41:40,469 INFO L93 Difference]: Finished difference Result 1541 states and 3710 transitions. [2022-01-18 16:41:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 16:41:40,469 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 [2022-01-18 16:41:40,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:41:40,472 INFO L225 Difference]: With dead ends: 1541 [2022-01-18 16:41:40,472 INFO L226 Difference]: Without dead ends: 1473 [2022-01-18 16:41:40,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=540, Invalid=3620, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 16:41:40,472 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, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:41:40,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 181 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:41:40,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2022-01-18 16:41:40,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1230. [2022-01-18 16:41:40,485 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) [2022-01-18 16:41:40,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 3048 transitions. [2022-01-18 16:41:40,488 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 3048 transitions. Word has length 26 [2022-01-18 16:41:40,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:41:40,488 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 3048 transitions. [2022-01-18 16:41:40,488 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) [2022-01-18 16:41:40,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 3048 transitions. [2022-01-18 16:41:40,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:41:40,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:41:40,490 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:41:40,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 16:41:40,705 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 [2022-01-18 16:41:40,705 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:41:40,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:41:40,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1127291350, now seen corresponding path program 47 times [2022-01-18 16:41:40,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:41:40,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954480649] [2022-01-18 16:41:40,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:41:40,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:41:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:41:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:40,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:41:40,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954480649] [2022-01-18 16:41:40,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954480649] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:41:40,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762295280] [2022-01-18 16:41:40,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:41:40,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:41:40,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:41:40,959 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) [2022-01-18 16:41:40,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 16:41:40,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 16:41:40,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:41:40,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:41:40,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:41:41,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:41,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:41,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:41,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:41,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:41,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:41,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:41,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:41,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:41,245 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 [2022-01-18 16:41:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:41,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:41:41,512 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:41:41,512 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 [2022-01-18 16:41:41,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:41,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:41,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:41,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:41,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:41,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:41,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:41,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:41,748 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 [2022-01-18 16:41:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:41,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762295280] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:41:41,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:41:41,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2022-01-18 16:41:41,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305306645] [2022-01-18 16:41:41,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:41:41,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:41:41,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:41:41,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:41:41,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:41:41,786 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) [2022-01-18 16:41:43,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:41:43,658 INFO L93 Difference]: Finished difference Result 1414 states and 3424 transitions. [2022-01-18 16:41:43,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 16:41:43,660 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 [2022-01-18 16:41:43,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:41:43,663 INFO L225 Difference]: With dead ends: 1414 [2022-01-18 16:41:43,663 INFO L226 Difference]: Without dead ends: 1388 [2022-01-18 16:41:43,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=475, Invalid=3431, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 16:41:43,665 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 [2022-01-18 16:41:43,665 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] [2022-01-18 16:41:43,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2022-01-18 16:41:43,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1244. [2022-01-18 16:41:43,682 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) [2022-01-18 16:41:43,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 3076 transitions. [2022-01-18 16:41:43,685 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 3076 transitions. Word has length 26 [2022-01-18 16:41:43,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:41:43,685 INFO L470 AbstractCegarLoop]: Abstraction has 1244 states and 3076 transitions. [2022-01-18 16:41:43,685 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) [2022-01-18 16:41:43,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 3076 transitions. [2022-01-18 16:41:43,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:41:43,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:41:43,687 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:41:43,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-01-18 16:41:43,895 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 [2022-01-18 16:41:43,895 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:41:43,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:41:43,896 INFO L85 PathProgramCache]: Analyzing trace with hash -509922762, now seen corresponding path program 48 times [2022-01-18 16:41:43,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:41:43,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539519295] [2022-01-18 16:41:43,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:41:43,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:41:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:41:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:44,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:41:44,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539519295] [2022-01-18 16:41:44,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539519295] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:41:44,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016620584] [2022-01-18 16:41:44,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:41:44,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:41:44,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:41:44,172 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) [2022-01-18 16:41:44,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 16:41:44,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:41:44,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:41:44,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:41:44,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:41:44,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:44,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:44,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:44,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:44,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:44,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:44,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:44,519 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 [2022-01-18 16:41:44,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:44,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:41:44,820 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:41:44,820 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 [2022-01-18 16:41:44,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:44,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:44,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:44,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:45,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:45,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:45,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:45,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:45,002 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 31 treesize of output 5 [2022-01-18 16:41:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:45,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016620584] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:41:45,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:41:45,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-01-18 16:41:45,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176693153] [2022-01-18 16:41:45,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:41:45,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:41:45,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:41:45,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:41:45,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:41:45,051 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) [2022-01-18 16:41:46,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:41:46,364 INFO L93 Difference]: Finished difference Result 1765 states and 4214 transitions. [2022-01-18 16:41:46,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:41:46,365 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 [2022-01-18 16:41:46,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:41:46,368 INFO L225 Difference]: With dead ends: 1765 [2022-01-18 16:41:46,368 INFO L226 Difference]: Without dead ends: 1740 [2022-01-18 16:41:46,368 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 [2022-01-18 16:41:46,369 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, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:41:46,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 249 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 981 Invalid, 0 Unknown, 178 Unchecked, 0.5s Time] [2022-01-18 16:41:46,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2022-01-18 16:41:46,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1287. [2022-01-18 16:41:46,386 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) [2022-01-18 16:41:46,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 3190 transitions. [2022-01-18 16:41:46,387 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 3190 transitions. Word has length 26 [2022-01-18 16:41:46,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:41:46,388 INFO L470 AbstractCegarLoop]: Abstraction has 1287 states and 3190 transitions. [2022-01-18 16:41:46,388 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) [2022-01-18 16:41:46,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 3190 transitions. [2022-01-18 16:41:46,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:41:46,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:41:46,389 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:41:46,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-01-18 16:41:46,590 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 [2022-01-18 16:41:46,590 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:41:46,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:41:46,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1776670478, now seen corresponding path program 49 times [2022-01-18 16:41:46,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:41:46,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786536834] [2022-01-18 16:41:46,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:41:46,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:41:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:41:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:46,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:41:46,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786536834] [2022-01-18 16:41:46,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786536834] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:41:46,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965363283] [2022-01-18 16:41:46,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:41:46,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:41:46,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:41:46,822 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) [2022-01-18 16:41:46,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 16:41:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:41:46,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:41:46,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:41:47,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:47,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:47,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:47,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:47,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:47,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:47,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:47,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:47,136 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 [2022-01-18 16:41:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:47,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:41:47,361 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:41:47,362 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 [2022-01-18 16:41:47,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:47,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:47,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:47,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:47,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:47,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:47,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:47,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:47,513 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 [2022-01-18 16:41:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:47,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965363283] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:41:47,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:41:47,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 23 [2022-01-18 16:41:47,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106527423] [2022-01-18 16:41:47,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:41:47,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 16:41:47,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:41:47,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 16:41:47,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-01-18 16:41:47,562 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) [2022-01-18 16:41:48,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:41:48,684 INFO L93 Difference]: Finished difference Result 1693 states and 3972 transitions. [2022-01-18 16:41:48,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:41:48,685 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 [2022-01-18 16:41:48,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:41:48,690 INFO L225 Difference]: With dead ends: 1693 [2022-01-18 16:41:48,690 INFO L226 Difference]: Without dead ends: 1659 [2022-01-18 16:41:48,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=353, Invalid=2197, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:41:48,691 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 [2022-01-18 16:41:48,691 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] [2022-01-18 16:41:48,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2022-01-18 16:41:48,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1368. [2022-01-18 16:41:48,714 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) [2022-01-18 16:41:48,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 3418 transitions. [2022-01-18 16:41:48,716 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 3418 transitions. Word has length 26 [2022-01-18 16:41:48,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:41:48,717 INFO L470 AbstractCegarLoop]: Abstraction has 1368 states and 3418 transitions. [2022-01-18 16:41:48,717 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) [2022-01-18 16:41:48,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 3418 transitions. [2022-01-18 16:41:48,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:41:48,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:41:48,719 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:41:48,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 16:41:48,939 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 [2022-01-18 16:41:48,939 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:41:48,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:41:48,940 INFO L85 PathProgramCache]: Analyzing trace with hash -719982534, now seen corresponding path program 50 times [2022-01-18 16:41:48,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:41:48,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419582064] [2022-01-18 16:41:48,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:41:48,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:41:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:41:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:49,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:41:49,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419582064] [2022-01-18 16:41:49,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419582064] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:41:49,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495480133] [2022-01-18 16:41:49,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:41:49,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:41:49,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:41:49,146 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) [2022-01-18 16:41:49,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 16:41:49,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:41:49,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:41:49,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:41:49,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:41:49,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:49,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:49,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:49,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:49,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:49,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:49,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:49,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:49,453 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 [2022-01-18 16:41:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:49,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:41:49,670 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:41:49,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 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 [2022-01-18 16:41:49,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:49,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:49,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:49,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:49,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:49,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:49,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:49,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:49,816 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 [2022-01-18 16:41:49,864 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:49,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495480133] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:41:49,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:41:49,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 23 [2022-01-18 16:41:49,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534959752] [2022-01-18 16:41:49,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:41:49,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 16:41:49,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:41:49,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 16:41:49,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-01-18 16:41:49,865 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) [2022-01-18 16:41:50,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:41:50,857 INFO L93 Difference]: Finished difference Result 1665 states and 3913 transitions. [2022-01-18 16:41:50,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 16:41:50,857 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 [2022-01-18 16:41:50,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:41:50,859 INFO L225 Difference]: With dead ends: 1665 [2022-01-18 16:41:50,859 INFO L226 Difference]: Without dead ends: 1662 [2022-01-18 16:41:50,860 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 [2022-01-18 16:41:50,860 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 195 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-01-18 16:41:50,860 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] [2022-01-18 16:41:50,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2022-01-18 16:41:50,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1364. [2022-01-18 16:41:50,878 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) [2022-01-18 16:41:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 3410 transitions. [2022-01-18 16:41:50,881 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 3410 transitions. Word has length 26 [2022-01-18 16:41:50,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:41:50,881 INFO L470 AbstractCegarLoop]: Abstraction has 1364 states and 3410 transitions. [2022-01-18 16:41:50,881 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) [2022-01-18 16:41:50,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 3410 transitions. [2022-01-18 16:41:50,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:41:50,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:41:50,884 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:41:50,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-18 16:41:51,104 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 [2022-01-18 16:41:51,104 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:41:51,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:41:51,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1113980334, now seen corresponding path program 51 times [2022-01-18 16:41:51,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:41:51,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432586861] [2022-01-18 16:41:51,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:41:51,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:41:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:41:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:51,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:41:51,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432586861] [2022-01-18 16:41:51,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432586861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:41:51,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994848573] [2022-01-18 16:41:51,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:41:51,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:41:51,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:41:51,350 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) [2022-01-18 16:41:51,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 16:41:51,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:41:51,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:41:51,371 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:41:51,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:41:51,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:51,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:51,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:51,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:51,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:51,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:41:51,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:51,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:41:51,755 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 [2022-01-18 16:41:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:52,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:41:52,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:52,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:52,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:52,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:41:52,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:41:52,889 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 [2022-01-18 16:41:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:41:55,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994848573] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:41:55,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:41:55,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 34 [2022-01-18 16:41:55,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62196355] [2022-01-18 16:41:55,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:41:55,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 16:41:55,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:41:55,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 16:41:55,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:41:55,255 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) [2022-01-18 16:41:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:41:59,932 INFO L93 Difference]: Finished difference Result 2389 states and 5627 transitions. [2022-01-18 16:41:59,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 16:41:59,932 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 [2022-01-18 16:41:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:41:59,935 INFO L225 Difference]: With dead ends: 2389 [2022-01-18 16:41:59,935 INFO L226 Difference]: Without dead ends: 2321 [2022-01-18 16:41:59,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 24 SyntacticMatches, 9 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3062 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1586, Invalid=8314, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 16:41:59,936 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 [2022-01-18 16:41:59,937 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] [2022-01-18 16:41:59,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2321 states. [2022-01-18 16:41:59,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2321 to 1406. [2022-01-18 16:41:59,966 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) [2022-01-18 16:41:59,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1406 states to 1406 states and 3511 transitions. [2022-01-18 16:41:59,969 INFO L78 Accepts]: Start accepts. Automaton has 1406 states and 3511 transitions. Word has length 26 [2022-01-18 16:41:59,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:41:59,969 INFO L470 AbstractCegarLoop]: Abstraction has 1406 states and 3511 transitions. [2022-01-18 16:41:59,969 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) [2022-01-18 16:41:59,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1406 states and 3511 transitions. [2022-01-18 16:41:59,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:41:59,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:41:59,971 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:41:59,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 16:42:00,195 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 [2022-01-18 16:42:00,195 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:00,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:00,195 INFO L85 PathProgramCache]: Analyzing trace with hash -3388566, now seen corresponding path program 52 times [2022-01-18 16:42:00,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:00,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993236544] [2022-01-18 16:42:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:00,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:00,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:00,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993236544] [2022-01-18 16:42:00,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993236544] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:00,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060410312] [2022-01-18 16:42:00,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:42:00,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:00,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:00,461 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) [2022-01-18 16:42:00,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 16:42:00,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:42:00,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:42:00,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:42:00,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:00,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:00,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:00,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:00,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:00,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:00,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:00,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:00,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:00,796 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 [2022-01-18 16:42:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:00,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:01,047 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:42:01,048 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 [2022-01-18 16:42:01,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:01,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:01,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:01,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:01,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:01,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:01,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:01,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:01,247 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 [2022-01-18 16:42:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:01,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060410312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:42:01,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:42:01,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2022-01-18 16:42:01,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762521298] [2022-01-18 16:42:01,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:42:01,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:42:01,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:42:01,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:42:01,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:42:01,298 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) [2022-01-18 16:42:02,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:42:02,878 INFO L93 Difference]: Finished difference Result 1692 states and 4095 transitions. [2022-01-18 16:42:02,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 16:42:02,878 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 [2022-01-18 16:42:02,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:42:02,880 INFO L225 Difference]: With dead ends: 1692 [2022-01-18 16:42:02,880 INFO L226 Difference]: Without dead ends: 1608 [2022-01-18 16:42:02,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=485, Invalid=2821, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 16:42:02,881 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 187 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-01-18 16:42:02,881 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] [2022-01-18 16:42:02,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2022-01-18 16:42:02,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1433. [2022-01-18 16:42:02,897 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) [2022-01-18 16:42:02,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 3551 transitions. [2022-01-18 16:42:02,899 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 3551 transitions. Word has length 26 [2022-01-18 16:42:02,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:42:02,899 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 3551 transitions. [2022-01-18 16:42:02,899 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) [2022-01-18 16:42:02,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 3551 transitions. [2022-01-18 16:42:02,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:42:02,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:42:02,901 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:42:02,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-18 16:42:03,101 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 [2022-01-18 16:42:03,102 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:03,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:03,102 INFO L85 PathProgramCache]: Analyzing trace with hash 908041902, now seen corresponding path program 53 times [2022-01-18 16:42:03,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:03,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183573939] [2022-01-18 16:42:03,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:03,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:03,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:03,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183573939] [2022-01-18 16:42:03,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183573939] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:03,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786244343] [2022-01-18 16:42:03,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:42:03,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:03,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:03,332 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) [2022-01-18 16:42:03,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 16:42:03,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:42:03,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:42:03,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:42:03,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:03,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:03,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:03,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:03,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:03,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:03,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:03,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:03,611 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 [2022-01-18 16:42:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:03,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:03,872 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:42:03,873 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 [2022-01-18 16:42:04,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:04,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:04,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:04,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:04,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:04,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:04,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:04,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:04,065 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 [2022-01-18 16:42:04,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:04,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786244343] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:42:04,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:42:04,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2022-01-18 16:42:04,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174939325] [2022-01-18 16:42:04,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:42:04,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:42:04,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:42:04,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:42:04,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:42:04,115 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) [2022-01-18 16:42:05,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:42:05,529 INFO L93 Difference]: Finished difference Result 1636 states and 3970 transitions. [2022-01-18 16:42:05,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:42:05,529 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 [2022-01-18 16:42:05,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:42:05,531 INFO L225 Difference]: With dead ends: 1636 [2022-01-18 16:42:05,531 INFO L226 Difference]: Without dead ends: 1626 [2022-01-18 16:42:05,532 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 [2022-01-18 16:42:05,532 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 [2022-01-18 16:42:05,532 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] [2022-01-18 16:42:05,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2022-01-18 16:42:05,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1442. [2022-01-18 16:42:05,548 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) [2022-01-18 16:42:05,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 3573 transitions. [2022-01-18 16:42:05,551 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 3573 transitions. Word has length 26 [2022-01-18 16:42:05,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:42:05,551 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 3573 transitions. [2022-01-18 16:42:05,551 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) [2022-01-18 16:42:05,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 3573 transitions. [2022-01-18 16:42:05,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 16:42:05,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:42:05,553 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:42:05,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-01-18 16:42:05,754 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 [2022-01-18 16:42:05,754 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:05,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:05,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1403227622, now seen corresponding path program 54 times [2022-01-18 16:42:05,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:05,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190595361] [2022-01-18 16:42:05,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:05,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:05,856 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:05,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:05,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190595361] [2022-01-18 16:42:05,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190595361] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:05,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233585565] [2022-01-18 16:42:05,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:42:05,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:05,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:05,858 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) [2022-01-18 16:42:05,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 16:42:05,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:42:05,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:42:05,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 16:42:05,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:06,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:06,241 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:06,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233585565] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:42:06,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:42:06,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-01-18 16:42:06,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211174818] [2022-01-18 16:42:06,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:42:06,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:42:06,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:42:06,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:42:06,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:42:06,243 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) [2022-01-18 16:42:07,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:42:07,136 INFO L93 Difference]: Finished difference Result 2062 states and 4783 transitions. [2022-01-18 16:42:07,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 16:42:07,136 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 [2022-01-18 16:42:07,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:42:07,139 INFO L225 Difference]: With dead ends: 2062 [2022-01-18 16:42:07,139 INFO L226 Difference]: Without dead ends: 2062 [2022-01-18 16:42:07,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1238, Invalid=3592, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 16:42:07,139 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 [2022-01-18 16:42:07,140 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] [2022-01-18 16:42:07,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2022-01-18 16:42:07,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1289. [2022-01-18 16:42:07,155 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) [2022-01-18 16:42:07,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 3198 transitions. [2022-01-18 16:42:07,157 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 3198 transitions. Word has length 28 [2022-01-18 16:42:07,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:42:07,157 INFO L470 AbstractCegarLoop]: Abstraction has 1289 states and 3198 transitions. [2022-01-18 16:42:07,157 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) [2022-01-18 16:42:07,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 3198 transitions. [2022-01-18 16:42:07,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 16:42:07,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:42:07,159 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:42:07,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-18 16:42:07,359 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 [2022-01-18 16:42:07,359 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:07,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:07,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1901754846, now seen corresponding path program 55 times [2022-01-18 16:42:07,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:07,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869656672] [2022-01-18 16:42:07,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:07,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:07,444 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:07,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:07,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869656672] [2022-01-18 16:42:07,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869656672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:07,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138271860] [2022-01-18 16:42:07,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:42:07,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:07,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:07,446 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) [2022-01-18 16:42:07,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 16:42:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:07,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 16:42:07,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:07,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:07,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138271860] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:42:07,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:42:07,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 16:42:07,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472207203] [2022-01-18 16:42:07,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:42:07,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:42:07,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:42:07,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:42:07,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:42:07,739 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) [2022-01-18 16:42:08,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:42:08,643 INFO L93 Difference]: Finished difference Result 2310 states and 5344 transitions. [2022-01-18 16:42:08,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 16:42:08,644 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 [2022-01-18 16:42:08,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:42:08,646 INFO L225 Difference]: With dead ends: 2310 [2022-01-18 16:42:08,646 INFO L226 Difference]: Without dead ends: 2239 [2022-01-18 16:42:08,647 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 [2022-01-18 16:42:08,647 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 [2022-01-18 16:42:08,647 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] [2022-01-18 16:42:08,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2022-01-18 16:42:08,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 1468. [2022-01-18 16:42:08,666 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) [2022-01-18 16:42:08,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 3663 transitions. [2022-01-18 16:42:08,668 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 3663 transitions. Word has length 28 [2022-01-18 16:42:08,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:42:08,668 INFO L470 AbstractCegarLoop]: Abstraction has 1468 states and 3663 transitions. [2022-01-18 16:42:08,668 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) [2022-01-18 16:42:08,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 3663 transitions. [2022-01-18 16:42:08,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 16:42:08,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:42:08,670 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:42:08,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-01-18 16:42:08,870 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 [2022-01-18 16:42:08,870 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:08,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:08,871 INFO L85 PathProgramCache]: Analyzing trace with hash -2007391006, now seen corresponding path program 56 times [2022-01-18 16:42:08,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:08,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720532209] [2022-01-18 16:42:08,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:08,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:08,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:08,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720532209] [2022-01-18 16:42:08,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720532209] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:08,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315914448] [2022-01-18 16:42:08,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:42:08,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:08,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:08,946 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) [2022-01-18 16:42:08,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 16:42:08,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:42:08,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:42:08,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 16:42:08,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:09,144 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:09,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:09,319 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:09,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315914448] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:42:09,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:42:09,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 25 [2022-01-18 16:42:09,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712074629] [2022-01-18 16:42:09,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:42:09,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:42:09,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:42:09,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:42:09,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:42:09,321 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) [2022-01-18 16:42:10,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:42:10,488 INFO L93 Difference]: Finished difference Result 2686 states and 6345 transitions. [2022-01-18 16:42:10,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 16:42:10,488 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 [2022-01-18 16:42:10,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:42:10,491 INFO L225 Difference]: With dead ends: 2686 [2022-01-18 16:42:10,491 INFO L226 Difference]: Without dead ends: 2682 [2022-01-18 16:42:10,492 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 [2022-01-18 16:42:10,492 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 371 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-01-18 16:42:10,492 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] [2022-01-18 16:42:10,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2022-01-18 16:42:10,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1786. [2022-01-18 16:42:10,522 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) [2022-01-18 16:42:10,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 4485 transitions. [2022-01-18 16:42:10,526 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 4485 transitions. Word has length 28 [2022-01-18 16:42:10,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:42:10,526 INFO L470 AbstractCegarLoop]: Abstraction has 1786 states and 4485 transitions. [2022-01-18 16:42:10,526 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) [2022-01-18 16:42:10,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 4485 transitions. [2022-01-18 16:42:10,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 16:42:10,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:42:10,529 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:42:10,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-18 16:42:10,735 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 [2022-01-18 16:42:10,735 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:10,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:10,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1955897502, now seen corresponding path program 57 times [2022-01-18 16:42:10,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:10,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510255273] [2022-01-18 16:42:10,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:10,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:10,810 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:10,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:10,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510255273] [2022-01-18 16:42:10,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510255273] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:10,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234004878] [2022-01-18 16:42:10,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:42:10,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:10,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:10,812 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) [2022-01-18 16:42:10,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 16:42:10,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 16:42:10,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:42:10,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 16:42:10,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:11,063 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:11,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:11,203 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:11,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234004878] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:42:11,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:42:11,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-01-18 16:42:11,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667427072] [2022-01-18 16:42:11,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:42:11,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:42:11,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:42:11,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:42:11,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:42:11,204 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) [2022-01-18 16:42:11,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:42:11,852 INFO L93 Difference]: Finished difference Result 2073 states and 5023 transitions. [2022-01-18 16:42:11,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 16:42:11,852 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 [2022-01-18 16:42:11,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:42:11,854 INFO L225 Difference]: With dead ends: 2073 [2022-01-18 16:42:11,854 INFO L226 Difference]: Without dead ends: 2069 [2022-01-18 16:42:11,855 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 [2022-01-18 16:42:11,855 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 172 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-01-18 16:42:11,855 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] [2022-01-18 16:42:11,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2022-01-18 16:42:11,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1761. [2022-01-18 16:42:11,873 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) [2022-01-18 16:42:11,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 4423 transitions. [2022-01-18 16:42:11,876 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 4423 transitions. Word has length 28 [2022-01-18 16:42:11,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:42:11,876 INFO L470 AbstractCegarLoop]: Abstraction has 1761 states and 4423 transitions. [2022-01-18 16:42:11,876 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) [2022-01-18 16:42:11,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 4423 transitions. [2022-01-18 16:42:11,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 16:42:11,878 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:42:11,878 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:42:11,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-18 16:42:12,078 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 [2022-01-18 16:42:12,079 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:12,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1571411288, now seen corresponding path program 58 times [2022-01-18 16:42:12,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:12,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818902241] [2022-01-18 16:42:12,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:12,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:42:12,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:12,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818902241] [2022-01-18 16:42:12,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818902241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:12,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148768960] [2022-01-18 16:42:12,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:42:12,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:12,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:12,139 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) [2022-01-18 16:42:12,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 16:42:12,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:42:12,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:42:12,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 16:42:12,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:12,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:12,486 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:12,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148768960] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:42:12,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:42:12,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-01-18 16:42:12,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447600732] [2022-01-18 16:42:12,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:42:12,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:42:12,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:42:12,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:42:12,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:42:12,488 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) [2022-01-18 16:42:13,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:42:13,153 INFO L93 Difference]: Finished difference Result 2379 states and 5765 transitions. [2022-01-18 16:42:13,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 16:42:13,153 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 [2022-01-18 16:42:13,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:42:13,155 INFO L225 Difference]: With dead ends: 2379 [2022-01-18 16:42:13,155 INFO L226 Difference]: Without dead ends: 2367 [2022-01-18 16:42:13,156 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 [2022-01-18 16:42:13,156 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 [2022-01-18 16:42:13,156 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] [2022-01-18 16:42:13,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2022-01-18 16:42:13,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 1864. [2022-01-18 16:42:13,178 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) [2022-01-18 16:42:13,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 4706 transitions. [2022-01-18 16:42:13,181 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 4706 transitions. Word has length 28 [2022-01-18 16:42:13,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:42:13,181 INFO L470 AbstractCegarLoop]: Abstraction has 1864 states and 4706 transitions. [2022-01-18 16:42:13,181 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) [2022-01-18 16:42:13,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 4706 transitions. [2022-01-18 16:42:13,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 16:42:13,183 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:42:13,183 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:42:13,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-01-18 16:42:13,399 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 [2022-01-18 16:42:13,399 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:13,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:13,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1126878266, now seen corresponding path program 59 times [2022-01-18 16:42:13,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:13,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591684117] [2022-01-18 16:42:13,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:13,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:13,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:13,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:13,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591684117] [2022-01-18 16:42:13,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591684117] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:13,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976644558] [2022-01-18 16:42:13,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:42:13,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:13,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:13,468 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) [2022-01-18 16:42:13,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 16:42:13,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-18 16:42:13,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:42:13,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 16:42:13,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:13,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:13,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976644558] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:42:13,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:42:13,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-01-18 16:42:13,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705306718] [2022-01-18 16:42:13,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:42:13,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:42:13,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:42:13,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:42:13,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:42:13,792 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) [2022-01-18 16:42:14,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:42:14,463 INFO L93 Difference]: Finished difference Result 2488 states and 5987 transitions. [2022-01-18 16:42:14,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:42:14,463 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 [2022-01-18 16:42:14,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:42:14,467 INFO L225 Difference]: With dead ends: 2488 [2022-01-18 16:42:14,467 INFO L226 Difference]: Without dead ends: 2474 [2022-01-18 16:42:14,468 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 [2022-01-18 16:42:14,468 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 [2022-01-18 16:42:14,468 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] [2022-01-18 16:42:14,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2022-01-18 16:42:14,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1917. [2022-01-18 16:42:14,494 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) [2022-01-18 16:42:14,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 4853 transitions. [2022-01-18 16:42:14,497 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 4853 transitions. Word has length 28 [2022-01-18 16:42:14,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:42:14,497 INFO L470 AbstractCegarLoop]: Abstraction has 1917 states and 4853 transitions. [2022-01-18 16:42:14,497 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) [2022-01-18 16:42:14,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 4853 transitions. [2022-01-18 16:42:14,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 16:42:14,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:42:14,501 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:42:14,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-01-18 16:42:14,718 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 [2022-01-18 16:42:14,719 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:14,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:14,719 INFO L85 PathProgramCache]: Analyzing trace with hash 681233606, now seen corresponding path program 60 times [2022-01-18 16:42:14,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:14,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211630950] [2022-01-18 16:42:14,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:14,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:14,788 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:14,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:14,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211630950] [2022-01-18 16:42:14,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211630950] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:14,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729581004] [2022-01-18 16:42:14,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:42:14,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:14,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:14,790 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) [2022-01-18 16:42:14,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 16:42:14,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 16:42:14,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:42:14,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 16:42:14,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:14,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:15,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729581004] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:42:15,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:42:15,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-01-18 16:42:15,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765023593] [2022-01-18 16:42:15,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:42:15,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:42:15,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:42:15,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:42:15,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:42:15,108 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) [2022-01-18 16:42:15,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:42:15,764 INFO L93 Difference]: Finished difference Result 2707 states and 6510 transitions. [2022-01-18 16:42:15,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 16:42:15,764 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 [2022-01-18 16:42:15,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:42:15,767 INFO L225 Difference]: With dead ends: 2707 [2022-01-18 16:42:15,767 INFO L226 Difference]: Without dead ends: 2685 [2022-01-18 16:42:15,768 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 [2022-01-18 16:42:15,768 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 [2022-01-18 16:42:15,768 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] [2022-01-18 16:42:15,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2022-01-18 16:42:15,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 1814. [2022-01-18 16:42:15,792 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) [2022-01-18 16:42:15,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 4566 transitions. [2022-01-18 16:42:15,794 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 4566 transitions. Word has length 28 [2022-01-18 16:42:15,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:42:15,794 INFO L470 AbstractCegarLoop]: Abstraction has 1814 states and 4566 transitions. [2022-01-18 16:42:15,794 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) [2022-01-18 16:42:15,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 4566 transitions. [2022-01-18 16:42:15,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 16:42:15,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:42:15,796 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:42:15,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-01-18 16:42:15,997 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 [2022-01-18 16:42:15,997 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:15,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:15,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1834776692, now seen corresponding path program 61 times [2022-01-18 16:42:15,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:15,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234452050] [2022-01-18 16:42:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:15,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:42:16,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:16,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234452050] [2022-01-18 16:42:16,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234452050] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:16,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974831349] [2022-01-18 16:42:16,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:42:16,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:16,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:16,087 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) [2022-01-18 16:42:16,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 16:42:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:16,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 16:42:16,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:16,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:16,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974831349] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:42:16,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:42:16,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 16:42:16,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729780477] [2022-01-18 16:42:16,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:42:16,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 16:42:16,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:42:16,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 16:42:16,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2022-01-18 16:42:16,410 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) [2022-01-18 16:42:17,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:42:17,354 INFO L93 Difference]: Finished difference Result 2769 states and 6415 transitions. [2022-01-18 16:42:17,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 16:42:17,354 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 [2022-01-18 16:42:17,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:42:17,358 INFO L225 Difference]: With dead ends: 2769 [2022-01-18 16:42:17,358 INFO L226 Difference]: Without dead ends: 2769 [2022-01-18 16:42:17,358 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 [2022-01-18 16:42:17,358 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 [2022-01-18 16:42:17,359 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] [2022-01-18 16:42:17,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2022-01-18 16:42:17,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 1600. [2022-01-18 16:42:17,381 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) [2022-01-18 16:42:17,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 3967 transitions. [2022-01-18 16:42:17,383 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 3967 transitions. Word has length 28 [2022-01-18 16:42:17,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:42:17,383 INFO L470 AbstractCegarLoop]: Abstraction has 1600 states and 3967 transitions. [2022-01-18 16:42:17,384 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) [2022-01-18 16:42:17,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 3967 transitions. [2022-01-18 16:42:17,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 16:42:17,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:42:17,385 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:42:17,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-01-18 16:42:17,585 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 [2022-01-18 16:42:17,586 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:17,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:17,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1049648184, now seen corresponding path program 62 times [2022-01-18 16:42:17,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:17,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48203828] [2022-01-18 16:42:17,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:17,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:42:17,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:17,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48203828] [2022-01-18 16:42:17,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48203828] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:17,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468511029] [2022-01-18 16:42:17,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:42:17,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:17,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:17,663 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) [2022-01-18 16:42:17,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 16:42:17,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:42:17,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:42:17,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 16:42:17,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:17,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:18,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468511029] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:42:18,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:42:18,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-01-18 16:42:18,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401878159] [2022-01-18 16:42:18,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:42:18,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:42:18,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:42:18,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:42:18,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:42:18,050 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) [2022-01-18 16:42:18,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:42:18,702 INFO L93 Difference]: Finished difference Result 2024 states and 4735 transitions. [2022-01-18 16:42:18,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 16:42:18,703 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 [2022-01-18 16:42:18,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:42:18,705 INFO L225 Difference]: With dead ends: 2024 [2022-01-18 16:42:18,705 INFO L226 Difference]: Without dead ends: 1985 [2022-01-18 16:42:18,705 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 [2022-01-18 16:42:18,705 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 [2022-01-18 16:42:18,705 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] [2022-01-18 16:42:18,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2022-01-18 16:42:18,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1546. [2022-01-18 16:42:18,722 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) [2022-01-18 16:42:18,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 3813 transitions. [2022-01-18 16:42:18,724 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 3813 transitions. Word has length 28 [2022-01-18 16:42:18,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:42:18,724 INFO L470 AbstractCegarLoop]: Abstraction has 1546 states and 3813 transitions. [2022-01-18 16:42:18,724 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) [2022-01-18 16:42:18,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 3813 transitions. [2022-01-18 16:42:18,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 16:42:18,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:42:18,725 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:42:18,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-01-18 16:42:18,926 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 [2022-01-18 16:42:18,926 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:18,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:18,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1729324172, now seen corresponding path program 63 times [2022-01-18 16:42:18,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:18,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969709487] [2022-01-18 16:42:18,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:18,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:18,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:42:18,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:18,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969709487] [2022-01-18 16:42:18,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969709487] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:18,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800441637] [2022-01-18 16:42:18,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:42:18,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:18,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:18,999 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) [2022-01-18 16:42:18,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 16:42:19,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:42:19,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:42:19,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 16:42:19,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:19,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:19,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800441637] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:42:19,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:42:19,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-01-18 16:42:19,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099209678] [2022-01-18 16:42:19,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:42:19,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:42:19,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:42:19,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:42:19,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:42:19,332 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) [2022-01-18 16:42:20,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:42:20,441 INFO L93 Difference]: Finished difference Result 2758 states and 6361 transitions. [2022-01-18 16:42:20,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 16:42:20,441 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 [2022-01-18 16:42:20,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:42:20,444 INFO L225 Difference]: With dead ends: 2758 [2022-01-18 16:42:20,444 INFO L226 Difference]: Without dead ends: 2758 [2022-01-18 16:42:20,445 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 [2022-01-18 16:42:20,445 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 336 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-01-18 16:42:20,446 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] [2022-01-18 16:42:20,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2758 states. [2022-01-18 16:42:20,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2758 to 1630. [2022-01-18 16:42:20,467 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) [2022-01-18 16:42:20,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 3989 transitions. [2022-01-18 16:42:20,469 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 3989 transitions. Word has length 28 [2022-01-18 16:42:20,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:42:20,469 INFO L470 AbstractCegarLoop]: Abstraction has 1630 states and 3989 transitions. [2022-01-18 16:42:20,469 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) [2022-01-18 16:42:20,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 3989 transitions. [2022-01-18 16:42:20,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 16:42:20,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:42:20,471 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:42:20,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-01-18 16:42:20,675 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 [2022-01-18 16:42:20,675 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:20,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:20,676 INFO L85 PathProgramCache]: Analyzing trace with hash -819162124, now seen corresponding path program 64 times [2022-01-18 16:42:20,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:20,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601276358] [2022-01-18 16:42:20,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:20,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:42:20,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:20,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601276358] [2022-01-18 16:42:20,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601276358] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:20,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576997873] [2022-01-18 16:42:20,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:42:20,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:20,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:20,739 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) [2022-01-18 16:42:20,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 16:42:20,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:42:20,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:42:20,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 16:42:20,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:20,927 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:20,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:21,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576997873] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:42:21,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:42:21,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-01-18 16:42:21,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981869271] [2022-01-18 16:42:21,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:42:21,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:42:21,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:42:21,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:42:21,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:42:21,052 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) [2022-01-18 16:42:21,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:42:21,620 INFO L93 Difference]: Finished difference Result 1964 states and 4612 transitions. [2022-01-18 16:42:21,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:42:21,621 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 [2022-01-18 16:42:21,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:42:21,623 INFO L225 Difference]: With dead ends: 1964 [2022-01-18 16:42:21,623 INFO L226 Difference]: Without dead ends: 1946 [2022-01-18 16:42:21,623 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 [2022-01-18 16:42:21,623 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 [2022-01-18 16:42:21,624 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] [2022-01-18 16:42:21,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2022-01-18 16:42:21,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1629. [2022-01-18 16:42:21,638 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) [2022-01-18 16:42:21,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 3985 transitions. [2022-01-18 16:42:21,640 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 3985 transitions. Word has length 28 [2022-01-18 16:42:21,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:42:21,640 INFO L470 AbstractCegarLoop]: Abstraction has 1629 states and 3985 transitions. [2022-01-18 16:42:21,640 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) [2022-01-18 16:42:21,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 3985 transitions. [2022-01-18 16:42:21,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 16:42:21,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:42:21,642 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:42:21,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 16:42:21,843 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 [2022-01-18 16:42:21,843 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:21,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:21,843 INFO L85 PathProgramCache]: Analyzing trace with hash 617050672, now seen corresponding path program 65 times [2022-01-18 16:42:21,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:21,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640304307] [2022-01-18 16:42:21,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:21,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:42:21,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:21,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640304307] [2022-01-18 16:42:21,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640304307] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:21,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086187908] [2022-01-18 16:42:21,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:42:21,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:21,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:21,928 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) [2022-01-18 16:42:21,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 16:42:21,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 16:42:21,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:42:21,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 16:42:21,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:22,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:22,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086187908] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:42:22,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:42:22,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 25 [2022-01-18 16:42:22,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141588518] [2022-01-18 16:42:22,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:42:22,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:42:22,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:42:22,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:42:22,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:42:22,349 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) [2022-01-18 16:42:23,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:42:23,675 INFO L93 Difference]: Finished difference Result 3359 states and 7975 transitions. [2022-01-18 16:42:23,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 16:42:23,675 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 [2022-01-18 16:42:23,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:42:23,679 INFO L225 Difference]: With dead ends: 3359 [2022-01-18 16:42:23,679 INFO L226 Difference]: Without dead ends: 3359 [2022-01-18 16:42:23,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3415 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2555, Invalid=6187, Unknown=0, NotChecked=0, Total=8742 [2022-01-18 16:42:23,681 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 [2022-01-18 16:42:23,681 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] [2022-01-18 16:42:23,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3359 states. [2022-01-18 16:42:23,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3359 to 2498. [2022-01-18 16:42:23,715 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) [2022-01-18 16:42:23,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 6313 transitions. [2022-01-18 16:42:23,719 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 6313 transitions. Word has length 28 [2022-01-18 16:42:23,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:42:23,719 INFO L470 AbstractCegarLoop]: Abstraction has 2498 states and 6313 transitions. [2022-01-18 16:42:23,719 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) [2022-01-18 16:42:23,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 6313 transitions. [2022-01-18 16:42:23,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 16:42:23,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:42:23,721 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:42:23,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-01-18 16:42:23,922 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 [2022-01-18 16:42:23,922 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:23,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:23,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1135030552, now seen corresponding path program 66 times [2022-01-18 16:42:23,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:23,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830045251] [2022-01-18 16:42:23,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:23,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:42:23,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:23,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830045251] [2022-01-18 16:42:23,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830045251] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:23,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385256487] [2022-01-18 16:42:23,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:42:23,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:23,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:23,980 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) [2022-01-18 16:42:23,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 16:42:24,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:42:24,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:42:24,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 16:42:24,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:24,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:24,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385256487] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:42:24,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:42:24,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-01-18 16:42:24,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828588628] [2022-01-18 16:42:24,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:42:24,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:42:24,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:42:24,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:42:24,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:42:24,341 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) [2022-01-18 16:42:25,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:42:25,239 INFO L93 Difference]: Finished difference Result 3045 states and 7377 transitions. [2022-01-18 16:42:25,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:42:25,240 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 [2022-01-18 16:42:25,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:42:25,244 INFO L225 Difference]: With dead ends: 3045 [2022-01-18 16:42:25,244 INFO L226 Difference]: Without dead ends: 3041 [2022-01-18 16:42:25,244 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 [2022-01-18 16:42:25,245 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 [2022-01-18 16:42:25,245 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] [2022-01-18 16:42:25,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2022-01-18 16:42:25,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 2472. [2022-01-18 16:42:25,277 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) [2022-01-18 16:42:25,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 6241 transitions. [2022-01-18 16:42:25,281 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 6241 transitions. Word has length 28 [2022-01-18 16:42:25,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:42:25,281 INFO L470 AbstractCegarLoop]: Abstraction has 2472 states and 6241 transitions. [2022-01-18 16:42:25,281 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) [2022-01-18 16:42:25,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 6241 transitions. [2022-01-18 16:42:25,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 16:42:25,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:42:25,284 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:42:25,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-18 16:42:25,484 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 [2022-01-18 16:42:25,484 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:25,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:25,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1641376818, now seen corresponding path program 67 times [2022-01-18 16:42:25,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:25,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520274839] [2022-01-18 16:42:25,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:25,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:42:25,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:25,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520274839] [2022-01-18 16:42:25,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520274839] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:25,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708003086] [2022-01-18 16:42:25,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:42:25,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:25,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:25,561 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) [2022-01-18 16:42:25,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 16:42:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:25,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 16:42:25,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:25,774 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:25,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:25,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708003086] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:42:25,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:42:25,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-01-18 16:42:25,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174683523] [2022-01-18 16:42:25,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:42:25,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:42:25,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:42:25,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:42:25,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:42:25,912 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) [2022-01-18 16:42:26,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:42:26,742 INFO L93 Difference]: Finished difference Result 3267 states and 7923 transitions. [2022-01-18 16:42:26,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 16:42:26,743 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 [2022-01-18 16:42:26,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:42:26,747 INFO L225 Difference]: With dead ends: 3267 [2022-01-18 16:42:26,747 INFO L226 Difference]: Without dead ends: 3255 [2022-01-18 16:42:26,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1250, Invalid=3172, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 16:42:26,748 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 [2022-01-18 16:42:26,748 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] [2022-01-18 16:42:26,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2022-01-18 16:42:26,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2666. [2022-01-18 16:42:26,782 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) [2022-01-18 16:42:26,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 6768 transitions. [2022-01-18 16:42:26,786 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 6768 transitions. Word has length 28 [2022-01-18 16:42:26,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:42:26,786 INFO L470 AbstractCegarLoop]: Abstraction has 2666 states and 6768 transitions. [2022-01-18 16:42:26,786 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) [2022-01-18 16:42:26,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 6768 transitions. [2022-01-18 16:42:26,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 16:42:26,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:42:26,800 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:42:26,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-18 16:42:27,000 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 [2022-01-18 16:42:27,001 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:27,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:27,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1868598198, now seen corresponding path program 68 times [2022-01-18 16:42:27,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:27,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634208764] [2022-01-18 16:42:27,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:27,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:27,070 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:42:27,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:27,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634208764] [2022-01-18 16:42:27,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634208764] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:27,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001059336] [2022-01-18 16:42:27,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:42:27,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:27,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:27,072 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) [2022-01-18 16:42:27,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 16:42:27,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:42:27,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:42:27,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 16:42:27,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:27,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:27,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001059336] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:42:27,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:42:27,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-01-18 16:42:27,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712863049] [2022-01-18 16:42:27,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:42:27,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:42:27,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:42:27,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:42:27,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:42:27,462 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) [2022-01-18 16:42:28,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:42:28,301 INFO L93 Difference]: Finished difference Result 3608 states and 8768 transitions. [2022-01-18 16:42:28,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 16:42:28,301 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 [2022-01-18 16:42:28,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:42:28,305 INFO L225 Difference]: With dead ends: 3608 [2022-01-18 16:42:28,305 INFO L226 Difference]: Without dead ends: 3588 [2022-01-18 16:42:28,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1194, Invalid=3096, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 16:42:28,306 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 [2022-01-18 16:42:28,306 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] [2022-01-18 16:42:28,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3588 states. [2022-01-18 16:42:28,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3588 to 2939. [2022-01-18 16:42:28,345 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) [2022-01-18 16:42:28,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 7497 transitions. [2022-01-18 16:42:28,349 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 7497 transitions. Word has length 28 [2022-01-18 16:42:28,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:42:28,349 INFO L470 AbstractCegarLoop]: Abstraction has 2939 states and 7497 transitions. [2022-01-18 16:42:28,349 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) [2022-01-18 16:42:28,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 7497 transitions. [2022-01-18 16:42:28,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 16:42:28,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:42:28,352 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:42:28,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-18 16:42:28,552 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 [2022-01-18 16:42:28,553 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:28,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:28,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1185012282, now seen corresponding path program 69 times [2022-01-18 16:42:28,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:28,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141513274] [2022-01-18 16:42:28,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:28,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:28,620 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:28,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:28,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141513274] [2022-01-18 16:42:28,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141513274] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:28,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617538524] [2022-01-18 16:42:28,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:42:28,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:28,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:28,621 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) [2022-01-18 16:42:28,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 16:42:28,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:42:28,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:42:28,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 16:42:28,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:28,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:28,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617538524] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:42:28,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:42:28,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 16:42:28,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287945238] [2022-01-18 16:42:28,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:42:28,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:42:28,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:42:28,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:42:28,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:42:28,916 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) [2022-01-18 16:42:29,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:42:29,593 INFO L93 Difference]: Finished difference Result 3723 states and 9138 transitions. [2022-01-18 16:42:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 16:42:29,594 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 [2022-01-18 16:42:29,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:42:29,598 INFO L225 Difference]: With dead ends: 3723 [2022-01-18 16:42:29,598 INFO L226 Difference]: Without dead ends: 3695 [2022-01-18 16:42:29,599 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 [2022-01-18 16:42:29,599 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 [2022-01-18 16:42:29,599 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] [2022-01-18 16:42:29,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3695 states. [2022-01-18 16:42:29,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3695 to 3119. [2022-01-18 16:42:29,652 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) [2022-01-18 16:42:29,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3119 states to 3119 states and 7980 transitions. [2022-01-18 16:42:29,657 INFO L78 Accepts]: Start accepts. Automaton has 3119 states and 7980 transitions. Word has length 28 [2022-01-18 16:42:29,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:42:29,657 INFO L470 AbstractCegarLoop]: Abstraction has 3119 states and 7980 transitions. [2022-01-18 16:42:29,657 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) [2022-01-18 16:42:29,657 INFO L276 IsEmpty]: Start isEmpty. Operand 3119 states and 7980 transitions. [2022-01-18 16:42:29,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:42:29,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:42:29,661 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:42:29,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-01-18 16:42:29,861 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 [2022-01-18 16:42:29,862 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:29,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:29,862 INFO L85 PathProgramCache]: Analyzing trace with hash -114447712, now seen corresponding path program 70 times [2022-01-18 16:42:29,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:29,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753470481] [2022-01-18 16:42:29,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:29,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:30,165 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:30,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:30,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753470481] [2022-01-18 16:42:30,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753470481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:30,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837017864] [2022-01-18 16:42:30,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:42:30,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:30,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:30,167 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) [2022-01-18 16:42:30,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 16:42:30,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:42:30,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:42:30,187 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:42:30,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:30,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:30,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:30,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:30,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:30,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:30,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:30,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:30,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:30,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:30,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:30,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:30,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:30,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:30,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:30,637 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 [2022-01-18 16:42:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:30,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:31,107 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:42:31,107 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 [2022-01-18 16:42:31,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:31,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:31,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:31,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:31,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:31,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:31,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:31,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:31,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:31,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:31,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:31,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:31,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:31,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:31,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:31,455 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 [2022-01-18 16:42:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:31,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837017864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:42:31,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:42:31,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-01-18 16:42:31,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421727614] [2022-01-18 16:42:31,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:42:31,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:42:31,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:42:31,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:42:31,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:42:31,502 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) [2022-01-18 16:42:33,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:42:33,478 INFO L93 Difference]: Finished difference Result 4166 states and 10459 transitions. [2022-01-18 16:42:33,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 16:42:33,479 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 [2022-01-18 16:42:33,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:42:33,484 INFO L225 Difference]: With dead ends: 4166 [2022-01-18 16:42:33,484 INFO L226 Difference]: Without dead ends: 4159 [2022-01-18 16:42:33,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=574, Invalid=4976, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 16:42:33,484 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, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:42:33,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 228 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 660 Invalid, 0 Unknown, 296 Unchecked, 0.4s Time] [2022-01-18 16:42:33,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4159 states. [2022-01-18 16:42:33,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4159 to 3197. [2022-01-18 16:42:33,529 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) [2022-01-18 16:42:33,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 8159 transitions. [2022-01-18 16:42:33,534 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 8159 transitions. Word has length 30 [2022-01-18 16:42:33,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:42:33,534 INFO L470 AbstractCegarLoop]: Abstraction has 3197 states and 8159 transitions. [2022-01-18 16:42:33,535 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) [2022-01-18 16:42:33,535 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 8159 transitions. [2022-01-18 16:42:33,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:42:33,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:42:33,538 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:42:33,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-01-18 16:42:33,739 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 [2022-01-18 16:42:33,739 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:33,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:33,739 INFO L85 PathProgramCache]: Analyzing trace with hash 942240232, now seen corresponding path program 71 times [2022-01-18 16:42:33,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:33,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613199095] [2022-01-18 16:42:33,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:33,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:34,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:34,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613199095] [2022-01-18 16:42:34,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613199095] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:34,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194777975] [2022-01-18 16:42:34,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:42:34,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:34,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:34,032 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) [2022-01-18 16:42:34,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 16:42:34,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 16:42:34,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:42:34,053 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:42:34,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:34,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:34,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:34,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:34,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:34,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:34,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:34,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:34,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:34,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:34,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:34,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:34,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:34,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:34,481 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 [2022-01-18 16:42:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:34,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:34,903 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:42:34,904 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 [2022-01-18 16:42:35,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:35,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:35,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:35,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:35,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:35,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:35,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:35,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:35,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:35,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:35,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:35,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:35,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:35,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:35,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:35,525 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 [2022-01-18 16:42:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:35,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194777975] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:42:35,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:42:35,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-01-18 16:42:35,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143063550] [2022-01-18 16:42:35,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:42:35,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:42:35,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:42:35,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:42:35,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:42:35,560 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) [2022-01-18 16:42:37,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:42:37,730 INFO L93 Difference]: Finished difference Result 4404 states and 11005 transitions. [2022-01-18 16:42:37,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 16:42:37,731 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 [2022-01-18 16:42:37,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:42:37,736 INFO L225 Difference]: With dead ends: 4404 [2022-01-18 16:42:37,736 INFO L226 Difference]: Without dead ends: 4401 [2022-01-18 16:42:37,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=642, Invalid=5210, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 16:42:37,737 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, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:42:37,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 210 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 599 Invalid, 0 Unknown, 417 Unchecked, 0.4s Time] [2022-01-18 16:42:37,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2022-01-18 16:42:37,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 3295. [2022-01-18 16:42:37,787 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) [2022-01-18 16:42:37,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 8388 transitions. [2022-01-18 16:42:37,794 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 8388 transitions. Word has length 30 [2022-01-18 16:42:37,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:42:37,794 INFO L470 AbstractCegarLoop]: Abstraction has 3295 states and 8388 transitions. [2022-01-18 16:42:37,795 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) [2022-01-18 16:42:37,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 8388 transitions. [2022-01-18 16:42:37,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:42:37,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:42:37,799 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:42:37,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-18 16:42:38,021 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 [2022-01-18 16:42:38,022 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:38,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:38,022 INFO L85 PathProgramCache]: Analyzing trace with hash -631993436, now seen corresponding path program 72 times [2022-01-18 16:42:38,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:38,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965119962] [2022-01-18 16:42:38,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:38,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:38,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:38,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965119962] [2022-01-18 16:42:38,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965119962] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:38,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293386866] [2022-01-18 16:42:38,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:42:38,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:38,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:38,317 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) [2022-01-18 16:42:38,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 16:42:38,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:42:38,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:42:38,338 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:42:38,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:38,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:38,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:38,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:38,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:38,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:38,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:38,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:38,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:38,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:38,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:38,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:38,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:38,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:38,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:38,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:38,758 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 [2022-01-18 16:42:38,793 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:38,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:39,254 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:42:39,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 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 [2022-01-18 16:42:39,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:39,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:39,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:39,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:39,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:39,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:39,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:39,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:39,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:39,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:39,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:39,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:39,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:39,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:39,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:39,683 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 40 treesize of output 3 [2022-01-18 16:42:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:39,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293386866] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:42:39,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:42:39,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-01-18 16:42:39,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565355294] [2022-01-18 16:42:39,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:42:39,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:42:39,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:42:39,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:42:39,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:42:39,718 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) [2022-01-18 16:42:41,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:42:41,536 INFO L93 Difference]: Finished difference Result 4374 states and 10904 transitions. [2022-01-18 16:42:41,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 16:42:41,536 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 [2022-01-18 16:42:41,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:42:41,541 INFO L225 Difference]: With dead ends: 4374 [2022-01-18 16:42:41,541 INFO L226 Difference]: Without dead ends: 4371 [2022-01-18 16:42:41,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=526, Invalid=4586, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 16:42:41,542 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, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:42:41,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 233 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 668 Invalid, 0 Unknown, 273 Unchecked, 0.4s Time] [2022-01-18 16:42:41,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2022-01-18 16:42:41,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3320. [2022-01-18 16:42:41,576 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) [2022-01-18 16:42:41,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3320 states to 3320 states and 8441 transitions. [2022-01-18 16:42:41,581 INFO L78 Accepts]: Start accepts. Automaton has 3320 states and 8441 transitions. Word has length 30 [2022-01-18 16:42:41,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:42:41,581 INFO L470 AbstractCegarLoop]: Abstraction has 3320 states and 8441 transitions. [2022-01-18 16:42:41,581 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) [2022-01-18 16:42:41,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3320 states and 8441 transitions. [2022-01-18 16:42:41,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:42:41,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:42:41,584 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:42:41,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-01-18 16:42:41,784 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 [2022-01-18 16:42:41,784 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:41,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:41,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1642060192, now seen corresponding path program 73 times [2022-01-18 16:42:41,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:41,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308979864] [2022-01-18 16:42:41,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:41,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:42,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:42,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308979864] [2022-01-18 16:42:42,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308979864] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:42,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013757220] [2022-01-18 16:42:42,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:42:42,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:42,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:42,098 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) [2022-01-18 16:42:42,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 16:42:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:42,118 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:42:42,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:42,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:42,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:42,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:42,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:42,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:42,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:42,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:42,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:42,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:42,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:42,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:42,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:42,522 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 [2022-01-18 16:42:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:42,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:42,942 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:42:42,943 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 [2022-01-18 16:42:43,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:43,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:43,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:43,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:43,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:43,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:43,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:43,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:43,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:43,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:43,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:43,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:43,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:43,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:43,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:43,451 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 [2022-01-18 16:42:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:43,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013757220] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:42:43,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:42:43,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-01-18 16:42:43,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234062873] [2022-01-18 16:42:43,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:42:43,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:42:43,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:42:43,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:42:43,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:42:43,489 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) [2022-01-18 16:42:45,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:42:45,343 INFO L93 Difference]: Finished difference Result 4463 states and 11078 transitions. [2022-01-18 16:42:45,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 16:42:45,343 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 [2022-01-18 16:42:45,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:42:45,349 INFO L225 Difference]: With dead ends: 4463 [2022-01-18 16:42:45,349 INFO L226 Difference]: Without dead ends: 4460 [2022-01-18 16:42:45,349 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 [2022-01-18 16:42:45,350 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 [2022-01-18 16:42:45,350 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] [2022-01-18 16:42:45,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2022-01-18 16:42:45,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 3376. [2022-01-18 16:42:45,403 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) [2022-01-18 16:42:45,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3376 states to 3376 states and 8564 transitions. [2022-01-18 16:42:45,411 INFO L78 Accepts]: Start accepts. Automaton has 3376 states and 8564 transitions. Word has length 30 [2022-01-18 16:42:45,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:42:45,411 INFO L470 AbstractCegarLoop]: Abstraction has 3376 states and 8564 transitions. [2022-01-18 16:42:45,411 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) [2022-01-18 16:42:45,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3376 states and 8564 transitions. [2022-01-18 16:42:45,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:42:45,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:42:45,416 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:42:45,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-18 16:42:45,639 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 [2022-01-18 16:42:45,639 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:45,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:45,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1653603812, now seen corresponding path program 74 times [2022-01-18 16:42:45,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:45,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067045978] [2022-01-18 16:42:45,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:45,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:45,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:45,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067045978] [2022-01-18 16:42:45,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067045978] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:45,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580414652] [2022-01-18 16:42:45,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:42:45,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:45,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:45,991 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) [2022-01-18 16:42:45,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 16:42:46,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:42:46,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:42:46,012 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:42:46,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:46,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:46,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:46,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:46,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:46,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:46,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:46,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:46,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:46,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:46,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:46,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:46,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:46,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:46,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:46,430 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 [2022-01-18 16:42:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:46,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:46,877 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:42:46,877 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 [2022-01-18 16:42:47,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:47,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:47,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:47,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:47,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:47,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:47,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:47,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:47,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:47,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:47,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:47,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:47,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:47,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:47,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:47,514 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 40 treesize of output 3 [2022-01-18 16:42:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:47,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580414652] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:42:47,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:42:47,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-01-18 16:42:47,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305388704] [2022-01-18 16:42:47,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:42:47,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:42:47,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:42:47,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:42:47,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:42:47,550 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) [2022-01-18 16:42:49,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:42:49,755 INFO L93 Difference]: Finished difference Result 4650 states and 11509 transitions. [2022-01-18 16:42:49,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 16:42:49,755 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 [2022-01-18 16:42:49,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:42:49,761 INFO L225 Difference]: With dead ends: 4650 [2022-01-18 16:42:49,761 INFO L226 Difference]: Without dead ends: 4647 [2022-01-18 16:42:49,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=667, Invalid=5653, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:42:49,761 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 [2022-01-18 16:42:49,762 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] [2022-01-18 16:42:49,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4647 states. [2022-01-18 16:42:49,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4647 to 3449. [2022-01-18 16:42:49,810 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) [2022-01-18 16:42:49,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 8736 transitions. [2022-01-18 16:42:49,815 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 8736 transitions. Word has length 30 [2022-01-18 16:42:49,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:42:49,815 INFO L470 AbstractCegarLoop]: Abstraction has 3449 states and 8736 transitions. [2022-01-18 16:42:49,815 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) [2022-01-18 16:42:49,815 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 8736 transitions. [2022-01-18 16:42:49,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:42:49,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:42:49,819 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:42:49,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-01-18 16:42:50,019 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 [2022-01-18 16:42:50,019 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:42:50,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:42:50,020 INFO L85 PathProgramCache]: Analyzing trace with hash -822693660, now seen corresponding path program 75 times [2022-01-18 16:42:50,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:42:50,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351505168] [2022-01-18 16:42:50,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:42:50,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:42:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:42:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:50,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:42:50,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351505168] [2022-01-18 16:42:50,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351505168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:42:50,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530436028] [2022-01-18 16:42:50,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:42:50,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:42:50,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:42:50,372 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) [2022-01-18 16:42:50,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 16:42:50,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:42:50,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:42:50,405 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:42:50,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:42:51,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:51,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:51,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:51,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:51,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:51,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:42:51,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:51,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:42:51,396 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 [2022-01-18 16:42:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:42:52,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:42:53,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:53,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:42:53,894 INFO L353 Elim1Store]: treesize reduction 44, result has 83.1 percent of original size [2022-01-18 16:42:53,895 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 [2022-01-18 16:43:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:43:41,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530436028] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:43:41,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:43:41,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-01-18 16:43:41,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725463297] [2022-01-18 16:43:41,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:43:41,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:43:41,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:43:41,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:43:41,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1399, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:43:41,412 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) [2022-01-18 16:43:43,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:43:43,615 INFO L93 Difference]: Finished difference Result 4822 states and 11870 transitions. [2022-01-18 16:43:43,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 16:43:43,615 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 [2022-01-18 16:43:43,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:43:43,620 INFO L225 Difference]: With dead ends: 4822 [2022-01-18 16:43:43,621 INFO L226 Difference]: Without dead ends: 4808 [2022-01-18 16:43:43,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=689, Invalid=5631, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:43:43,621 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 [2022-01-18 16:43:43,621 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] [2022-01-18 16:43:43,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4808 states. [2022-01-18 16:43:43,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4808 to 3627. [2022-01-18 16:43:43,661 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) [2022-01-18 16:43:43,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 9183 transitions. [2022-01-18 16:43:43,666 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 9183 transitions. Word has length 30 [2022-01-18 16:43:43,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:43:43,666 INFO L470 AbstractCegarLoop]: Abstraction has 3627 states and 9183 transitions. [2022-01-18 16:43:43,666 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) [2022-01-18 16:43:43,666 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 9183 transitions. [2022-01-18 16:43:43,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:43:43,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:43:43,670 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:43:43,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-01-18 16:43:43,870 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 [2022-01-18 16:43:43,870 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:43:43,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:43:43,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1881646240, now seen corresponding path program 76 times [2022-01-18 16:43:43,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:43:43,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261607437] [2022-01-18 16:43:43,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:43:43,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:43:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:43:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:43:44,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:43:44,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261607437] [2022-01-18 16:43:44,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261607437] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:43:44,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660254176] [2022-01-18 16:43:44,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:43:44,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:43:44,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:43:44,193 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) [2022-01-18 16:43:44,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 16:43:44,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:43:44,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:43:44,215 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:43:44,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:43:44,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:44,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:44,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:44,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:44,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:44,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:44,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:44,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:44,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:44,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:44,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:44,618 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 [2022-01-18 16:43:44,645 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:43:44,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:43:45,062 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:43:45,062 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 [2022-01-18 16:43:45,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:45,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:45,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:45,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:45,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:45,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:45,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:45,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:45,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:45,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:45,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:45,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:45,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:45,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:45,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:45,602 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 [2022-01-18 16:43:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:43:45,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660254176] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:43:45,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:43:45,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-01-18 16:43:45,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761942289] [2022-01-18 16:43:45,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:43:45,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:43:45,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:43:45,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:43:45,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:43:45,639 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) [2022-01-18 16:43:47,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:43:47,782 INFO L93 Difference]: Finished difference Result 5062 states and 12550 transitions. [2022-01-18 16:43:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 16:43:47,782 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 [2022-01-18 16:43:47,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:43:47,788 INFO L225 Difference]: With dead ends: 5062 [2022-01-18 16:43:47,788 INFO L226 Difference]: Without dead ends: 5055 [2022-01-18 16:43:47,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=640, Invalid=4910, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 16:43:47,788 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 [2022-01-18 16:43:47,788 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] [2022-01-18 16:43:47,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5055 states. [2022-01-18 16:43:47,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5055 to 3754. [2022-01-18 16:43:47,828 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) [2022-01-18 16:43:47,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3754 states to 3754 states and 9506 transitions. [2022-01-18 16:43:47,833 INFO L78 Accepts]: Start accepts. Automaton has 3754 states and 9506 transitions. Word has length 30 [2022-01-18 16:43:47,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:43:47,833 INFO L470 AbstractCegarLoop]: Abstraction has 3754 states and 9506 transitions. [2022-01-18 16:43:47,833 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) [2022-01-18 16:43:47,833 INFO L276 IsEmpty]: Start isEmpty. Operand 3754 states and 9506 transitions. [2022-01-18 16:43:47,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:43:47,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:43:47,837 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:43:47,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-01-18 16:43:48,037 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 [2022-01-18 16:43:48,038 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:43:48,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:43:48,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1784027364, now seen corresponding path program 77 times [2022-01-18 16:43:48,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:43:48,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112733437] [2022-01-18 16:43:48,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:43:48,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:43:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:43:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:43:48,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:43:48,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112733437] [2022-01-18 16:43:48,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112733437] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:43:48,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531673466] [2022-01-18 16:43:48,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:43:48,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:43:48,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:43:48,348 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) [2022-01-18 16:43:48,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 16:43:48,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 16:43:48,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:43:48,369 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:43:48,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:43:48,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:48,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:48,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:48,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:48,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:48,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:48,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:48,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:48,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:48,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:48,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:48,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:48,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:48,775 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 [2022-01-18 16:43:48,802 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:43:48,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:43:49,205 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:43:49,205 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 [2022-01-18 16:43:49,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:49,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:49,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:49,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:49,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:49,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:49,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:49,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:49,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:49,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:49,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:49,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:49,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:49,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:49,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:49,563 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 [2022-01-18 16:43:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:43:49,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531673466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:43:49,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:43:49,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-01-18 16:43:49,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968573433] [2022-01-18 16:43:49,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:43:49,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:43:49,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:43:49,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:43:49,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:43:49,600 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) [2022-01-18 16:43:51,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:43:51,752 INFO L93 Difference]: Finished difference Result 4972 states and 12378 transitions. [2022-01-18 16:43:51,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 16:43:51,752 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 [2022-01-18 16:43:51,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:43:51,758 INFO L225 Difference]: With dead ends: 4972 [2022-01-18 16:43:51,758 INFO L226 Difference]: Without dead ends: 4965 [2022-01-18 16:43:51,759 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 [2022-01-18 16:43:51,759 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 153 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-01-18 16:43:51,759 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] [2022-01-18 16:43:51,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4965 states. [2022-01-18 16:43:51,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4965 to 3846. [2022-01-18 16:43:51,802 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) [2022-01-18 16:43:51,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3846 states to 3846 states and 9752 transitions. [2022-01-18 16:43:51,810 INFO L78 Accepts]: Start accepts. Automaton has 3846 states and 9752 transitions. Word has length 30 [2022-01-18 16:43:51,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:43:51,811 INFO L470 AbstractCegarLoop]: Abstraction has 3846 states and 9752 transitions. [2022-01-18 16:43:51,811 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) [2022-01-18 16:43:51,811 INFO L276 IsEmpty]: Start isEmpty. Operand 3846 states and 9752 transitions. [2022-01-18 16:43:51,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:43:51,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:43:51,816 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:43:51,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-01-18 16:43:52,033 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 [2022-01-18 16:43:52,033 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:43:52,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:43:52,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1502641948, now seen corresponding path program 78 times [2022-01-18 16:43:52,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:43:52,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709623809] [2022-01-18 16:43:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:43:52,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:43:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:43:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:43:52,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:43:52,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709623809] [2022-01-18 16:43:52,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709623809] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:43:52,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070477512] [2022-01-18 16:43:52,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:43:52,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:43:52,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:43:52,404 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) [2022-01-18 16:43:52,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 16:43:52,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:43:52,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:43:52,431 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:43:52,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:43:52,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:52,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:52,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:52,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:52,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:52,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:52,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:52,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:52,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:52,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:52,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:52,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:52,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:52,942 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 [2022-01-18 16:43:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:43:52,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:43:53,383 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:43:53,383 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 [2022-01-18 16:43:53,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:53,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:53,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:53,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:53,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:53,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:53,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:53,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:53,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:53,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:53,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:53,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:53,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:53,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:53,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:53,919 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 [2022-01-18 16:43:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:43:53,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070477512] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:43:53,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:43:53,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-01-18 16:43:53,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620137204] [2022-01-18 16:43:53,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:43:53,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:43:53,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:43:53,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:43:53,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:43:53,954 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) [2022-01-18 16:43:56,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:43:56,043 INFO L93 Difference]: Finished difference Result 5284 states and 13165 transitions. [2022-01-18 16:43:56,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 16:43:56,044 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 [2022-01-18 16:43:56,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:43:56,050 INFO L225 Difference]: With dead ends: 5284 [2022-01-18 16:43:56,050 INFO L226 Difference]: Without dead ends: 5277 [2022-01-18 16:43:56,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=614, Invalid=4642, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 16:43:56,051 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 118 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-01-18 16:43:56,051 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] [2022-01-18 16:43:56,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5277 states. [2022-01-18 16:43:56,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5277 to 4055. [2022-01-18 16:43:56,095 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) [2022-01-18 16:43:56,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4055 states to 4055 states and 10315 transitions. [2022-01-18 16:43:56,100 INFO L78 Accepts]: Start accepts. Automaton has 4055 states and 10315 transitions. Word has length 30 [2022-01-18 16:43:56,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:43:56,101 INFO L470 AbstractCegarLoop]: Abstraction has 4055 states and 10315 transitions. [2022-01-18 16:43:56,101 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) [2022-01-18 16:43:56,101 INFO L276 IsEmpty]: Start isEmpty. Operand 4055 states and 10315 transitions. [2022-01-18 16:43:56,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:43:56,105 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:43:56,105 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:43:56,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-01-18 16:43:56,305 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 [2022-01-18 16:43:56,305 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:43:56,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:43:56,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1774381284, now seen corresponding path program 79 times [2022-01-18 16:43:56,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:43:56,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161902907] [2022-01-18 16:43:56,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:43:56,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:43:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:43:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:43:56,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:43:56,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161902907] [2022-01-18 16:43:56,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161902907] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:43:56,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668546561] [2022-01-18 16:43:56,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:43:56,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:43:56,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:43:56,621 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) [2022-01-18 16:43:56,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 16:43:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:43:56,646 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:43:56,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:43:57,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:57,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:57,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:57,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:57,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:57,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:57,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:57,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:57,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:57,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:57,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:57,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:57,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:57,046 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 [2022-01-18 16:43:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:43:57,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:43:57,567 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:43:57,567 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 [2022-01-18 16:43:58,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:58,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:58,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:58,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:58,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:58,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:58,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:58,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:58,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:58,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:58,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:58,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:58,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:43:58,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:58,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:43:58,044 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 [2022-01-18 16:43:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:43:58,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668546561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:43:58,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:43:58,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-01-18 16:43:58,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724682332] [2022-01-18 16:43:58,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:43:58,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:43:58,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:43:58,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:43:58,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:43:58,080 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) [2022-01-18 16:43:59,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:43:59,813 INFO L93 Difference]: Finished difference Result 5287 states and 13244 transitions. [2022-01-18 16:43:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:43:59,813 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 [2022-01-18 16:43:59,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:43:59,820 INFO L225 Difference]: With dead ends: 5287 [2022-01-18 16:43:59,820 INFO L226 Difference]: Without dead ends: 5280 [2022-01-18 16:43:59,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=509, Invalid=4047, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 16:43:59,821 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 123 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-01-18 16:43:59,821 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] [2022-01-18 16:43:59,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2022-01-18 16:43:59,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 4097. [2022-01-18 16:43:59,884 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) [2022-01-18 16:43:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4097 states to 4097 states and 10444 transitions. [2022-01-18 16:43:59,893 INFO L78 Accepts]: Start accepts. Automaton has 4097 states and 10444 transitions. Word has length 30 [2022-01-18 16:43:59,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:43:59,893 INFO L470 AbstractCegarLoop]: Abstraction has 4097 states and 10444 transitions. [2022-01-18 16:43:59,893 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) [2022-01-18 16:43:59,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4097 states and 10444 transitions. [2022-01-18 16:43:59,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:43:59,898 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:43:59,898 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:43:59,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-01-18 16:44:00,098 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 [2022-01-18 16:44:00,098 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:44:00,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:44:00,100 INFO L85 PathProgramCache]: Analyzing trace with hash -550984530, now seen corresponding path program 80 times [2022-01-18 16:44:00,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:44:00,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363489381] [2022-01-18 16:44:00,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:44:00,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:44:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:44:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:44:00,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:44:00,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363489381] [2022-01-18 16:44:00,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363489381] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:44:00,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130495993] [2022-01-18 16:44:00,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:44:00,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:44:00,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:44:00,432 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) [2022-01-18 16:44:00,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 16:44:00,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:44:00,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:44:00,453 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:44:00,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:44:00,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:00,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:00,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:00,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:00,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:00,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:00,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:00,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:00,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:00,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:00,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:00,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:00,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:00,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:00,862 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 [2022-01-18 16:44:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:44:00,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:44:01,302 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:44:01,303 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 [2022-01-18 16:44:01,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:01,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:01,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:01,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:01,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:01,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:01,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:01,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:01,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:01,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:01,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:01,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:01,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:01,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:01,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:01,709 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 [2022-01-18 16:44:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:44:01,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130495993] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:44:01,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:44:01,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-01-18 16:44:01,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661105072] [2022-01-18 16:44:01,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:44:01,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:44:01,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:44:01,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:44:01,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:44:01,745 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) [2022-01-18 16:44:04,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:44:04,164 INFO L93 Difference]: Finished difference Result 5489 states and 13623 transitions. [2022-01-18 16:44:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 16:44:04,165 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 [2022-01-18 16:44:04,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:44:04,171 INFO L225 Difference]: With dead ends: 5489 [2022-01-18 16:44:04,171 INFO L226 Difference]: Without dead ends: 5400 [2022-01-18 16:44:04,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=685, Invalid=5321, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 16:44:04,172 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, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:44:04,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 374 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1062 Invalid, 0 Unknown, 311 Unchecked, 0.6s Time] [2022-01-18 16:44:04,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2022-01-18 16:44:04,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 4287. [2022-01-18 16:44:04,218 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) [2022-01-18 16:44:04,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4287 states to 4287 states and 10870 transitions. [2022-01-18 16:44:04,224 INFO L78 Accepts]: Start accepts. Automaton has 4287 states and 10870 transitions. Word has length 30 [2022-01-18 16:44:04,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:44:04,224 INFO L470 AbstractCegarLoop]: Abstraction has 4287 states and 10870 transitions. [2022-01-18 16:44:04,224 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) [2022-01-18 16:44:04,224 INFO L276 IsEmpty]: Start isEmpty. Operand 4287 states and 10870 transitions. [2022-01-18 16:44:04,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:44:04,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:44:04,228 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:44:04,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-01-18 16:44:04,428 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 [2022-01-18 16:44:04,429 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:44:04,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:44:04,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1068530254, now seen corresponding path program 81 times [2022-01-18 16:44:04,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:44:04,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241231298] [2022-01-18 16:44:04,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:44:04,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:44:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:44:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:44:04,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:44:04,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241231298] [2022-01-18 16:44:04,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241231298] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:44:04,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233670887] [2022-01-18 16:44:04,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:44:04,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:44:04,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:44:04,740 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) [2022-01-18 16:44:04,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 16:44:04,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:44:04,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:44:04,761 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:44:04,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:44:05,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:05,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:05,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:05,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:05,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:05,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:05,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:05,651 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:44:05,651 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 [2022-01-18 16:44:06,009 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:44:06,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:44:07,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:07,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:07,576 INFO L353 Elim1Store]: treesize reduction 44, result has 83.1 percent of original size [2022-01-18 16:44:07,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 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 [2022-01-18 16:44:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:44:46,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233670887] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:44:46,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:44:46,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-01-18 16:44:46,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773319902] [2022-01-18 16:44:46,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:44:46,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:44:46,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:44:46,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:44:46,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1400, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:44:46,973 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) [2022-01-18 16:44:49,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:44:49,095 INFO L93 Difference]: Finished difference Result 5896 states and 14560 transitions. [2022-01-18 16:44:49,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:44:49,095 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 [2022-01-18 16:44:49,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:44:49,102 INFO L225 Difference]: With dead ends: 5896 [2022-01-18 16:44:49,103 INFO L226 Difference]: Without dead ends: 5880 [2022-01-18 16:44:49,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 37 SyntacticMatches, 12 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=566, Invalid=4690, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 16:44:49,103 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 [2022-01-18 16:44:49,103 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] [2022-01-18 16:44:49,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5880 states. [2022-01-18 16:44:49,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5880 to 4291. [2022-01-18 16:44:49,157 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) [2022-01-18 16:44:49,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4291 states to 4291 states and 10878 transitions. [2022-01-18 16:44:49,166 INFO L78 Accepts]: Start accepts. Automaton has 4291 states and 10878 transitions. Word has length 30 [2022-01-18 16:44:49,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:44:49,166 INFO L470 AbstractCegarLoop]: Abstraction has 4291 states and 10878 transitions. [2022-01-18 16:44:49,166 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) [2022-01-18 16:44:49,166 INFO L276 IsEmpty]: Start isEmpty. Operand 4291 states and 10878 transitions. [2022-01-18 16:44:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:44:49,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:44:49,171 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:44:49,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-01-18 16:44:49,371 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 [2022-01-18 16:44:49,371 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:44:49,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:44:49,372 INFO L85 PathProgramCache]: Analyzing trace with hash -2127482834, now seen corresponding path program 82 times [2022-01-18 16:44:49,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:44:49,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652791191] [2022-01-18 16:44:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:44:49,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:44:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:44:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:44:49,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:44:49,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652791191] [2022-01-18 16:44:49,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652791191] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:44:49,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293688829] [2022-01-18 16:44:49,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:44:49,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:44:49,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:44:49,690 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) [2022-01-18 16:44:49,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 16:44:49,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:44:49,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:44:49,714 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:44:49,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:44:50,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:50,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:50,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:50,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:50,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:50,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:50,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:50,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:50,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:50,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:50,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:50,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:50,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:50,137 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 [2022-01-18 16:44:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:44:50,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:44:50,570 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:44:50,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 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 [2022-01-18 16:44:50,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:50,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:50,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:50,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:50,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:50,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:50,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:50,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:50,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:50,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:50,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:50,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:50,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:50,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:50,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:50,953 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 [2022-01-18 16:44:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:44:50,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293688829] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:44:50,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:44:50,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-01-18 16:44:50,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515500418] [2022-01-18 16:44:50,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:44:50,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:44:50,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:44:50,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:44:50,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:44:50,989 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) [2022-01-18 16:44:53,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:44:53,681 INFO L93 Difference]: Finished difference Result 5552 states and 13751 transitions. [2022-01-18 16:44:53,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 16:44:53,681 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 [2022-01-18 16:44:53,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:44:53,688 INFO L225 Difference]: With dead ends: 5552 [2022-01-18 16:44:53,689 INFO L226 Difference]: Without dead ends: 5453 [2022-01-18 16:44:53,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=714, Invalid=5448, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 16:44:53,689 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 [2022-01-18 16:44:53,689 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] [2022-01-18 16:44:53,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5453 states. [2022-01-18 16:44:53,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5453 to 4263. [2022-01-18 16:44:53,740 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) [2022-01-18 16:44:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4263 states to 4263 states and 10819 transitions. [2022-01-18 16:44:53,746 INFO L78 Accepts]: Start accepts. Automaton has 4263 states and 10819 transitions. Word has length 30 [2022-01-18 16:44:53,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:44:53,747 INFO L470 AbstractCegarLoop]: Abstraction has 4263 states and 10819 transitions. [2022-01-18 16:44:53,747 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) [2022-01-18 16:44:53,747 INFO L276 IsEmpty]: Start isEmpty. Operand 4263 states and 10819 transitions. [2022-01-18 16:44:53,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:44:53,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:44:53,753 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:44:53,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-01-18 16:44:53,967 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 [2022-01-18 16:44:53,967 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:44:53,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:44:53,968 INFO L85 PathProgramCache]: Analyzing trace with hash 938367594, now seen corresponding path program 83 times [2022-01-18 16:44:53,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:44:53,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519919669] [2022-01-18 16:44:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:44:53,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:44:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:44:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:44:54,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:44:54,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519919669] [2022-01-18 16:44:54,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519919669] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:44:54,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600611620] [2022-01-18 16:44:54,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:44:54,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:44:54,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:44:54,340 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) [2022-01-18 16:44:54,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 16:44:54,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 16:44:54,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:44:54,367 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:44:54,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:44:54,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:54,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:54,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:54,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:54,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:54,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:54,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:54,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:54,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:54,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:54,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:54,871 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 [2022-01-18 16:44:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:44:54,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:44:55,326 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:44:55,327 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 [2022-01-18 16:44:55,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:55,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:55,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:55,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:55,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:55,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:55,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:55,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:55,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:55,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:55,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:55,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:55,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:55,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:55,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:55,768 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 [2022-01-18 16:44:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:44:55,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600611620] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:44:55,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:44:55,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-01-18 16:44:55,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163276681] [2022-01-18 16:44:55,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:44:55,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:44:55,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:44:55,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:44:55,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:44:55,804 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) [2022-01-18 16:44:58,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:44:58,383 INFO L93 Difference]: Finished difference Result 5582 states and 13851 transitions. [2022-01-18 16:44:58,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 16:44:58,384 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 [2022-01-18 16:44:58,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:44:58,391 INFO L225 Difference]: With dead ends: 5582 [2022-01-18 16:44:58,392 INFO L226 Difference]: Without dead ends: 5513 [2022-01-18 16:44:58,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=748, Invalid=5104, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 16:44:58,392 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 [2022-01-18 16:44:58,392 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] [2022-01-18 16:44:58,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5513 states. [2022-01-18 16:44:58,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5513 to 4407. [2022-01-18 16:44:58,446 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) [2022-01-18 16:44:58,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4407 states to 4407 states and 11149 transitions. [2022-01-18 16:44:58,454 INFO L78 Accepts]: Start accepts. Automaton has 4407 states and 11149 transitions. Word has length 30 [2022-01-18 16:44:58,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:44:58,454 INFO L470 AbstractCegarLoop]: Abstraction has 4407 states and 11149 transitions. [2022-01-18 16:44:58,454 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) [2022-01-18 16:44:58,454 INFO L276 IsEmpty]: Start isEmpty. Operand 4407 states and 11149 transitions. [2022-01-18 16:44:58,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:44:58,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:44:58,459 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:44:58,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-18 16:44:58,659 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 [2022-01-18 16:44:58,660 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:44:58,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:44:58,660 INFO L85 PathProgramCache]: Analyzing trace with hash 420821870, now seen corresponding path program 84 times [2022-01-18 16:44:58,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:44:58,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145724855] [2022-01-18 16:44:58,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:44:58,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:44:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:44:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:44:58,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:44:58,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145724855] [2022-01-18 16:44:58,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145724855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:44:58,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312917272] [2022-01-18 16:44:58,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:44:58,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:44:58,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:44:58,967 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) [2022-01-18 16:44:58,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 16:44:58,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:44:58,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:44:58,990 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:44:58,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:44:59,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:59,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:59,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:59,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:59,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:59,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:59,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:59,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:59,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:59,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:59,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:59,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:44:59,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:44:59,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 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 [2022-01-18 16:44:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:44:59,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:44:59,847 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:44:59,847 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 [2022-01-18 16:45:00,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:00,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:00,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:00,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:00,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:00,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:00,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:00,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:00,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:00,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:00,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:00,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:00,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:00,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:00,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:00,222 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 [2022-01-18 16:45:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:45:00,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312917272] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:45:00,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:45:00,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-01-18 16:45:00,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736097232] [2022-01-18 16:45:00,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:45:00,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:45:00,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:45:00,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:45:00,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:45:00,257 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) [2022-01-18 16:45:02,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:45:02,750 INFO L93 Difference]: Finished difference Result 5498 states and 13608 transitions. [2022-01-18 16:45:02,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 16:45:02,751 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 [2022-01-18 16:45:02,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:45:02,758 INFO L225 Difference]: With dead ends: 5498 [2022-01-18 16:45:02,759 INFO L226 Difference]: Without dead ends: 5475 [2022-01-18 16:45:02,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1405 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=727, Invalid=4823, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 16:45:02,759 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 [2022-01-18 16:45:02,759 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] [2022-01-18 16:45:02,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5475 states. [2022-01-18 16:45:02,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5475 to 4391. [2022-01-18 16:45:02,813 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) [2022-01-18 16:45:02,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4391 states to 4391 states and 11107 transitions. [2022-01-18 16:45:02,820 INFO L78 Accepts]: Start accepts. Automaton has 4391 states and 11107 transitions. Word has length 30 [2022-01-18 16:45:02,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:45:02,820 INFO L470 AbstractCegarLoop]: Abstraction has 4391 states and 11107 transitions. [2022-01-18 16:45:02,820 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) [2022-01-18 16:45:02,820 INFO L276 IsEmpty]: Start isEmpty. Operand 4391 states and 11107 transitions. [2022-01-18 16:45:02,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:45:02,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:45:02,827 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:45:02,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-18 16:45:03,043 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 [2022-01-18 16:45:03,043 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:45:03,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:45:03,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1854127390, now seen corresponding path program 85 times [2022-01-18 16:45:03,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:45:03,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267417020] [2022-01-18 16:45:03,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:45:03,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:45:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:45:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:45:03,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:45:03,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267417020] [2022-01-18 16:45:03,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267417020] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:45:03,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368622410] [2022-01-18 16:45:03,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:45:03,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:45:03,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:45:03,369 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) [2022-01-18 16:45:03,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 16:45:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:45:03,391 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:45:03,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:45:03,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:03,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:03,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:03,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:03,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:03,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:03,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:03,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:03,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:03,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:03,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:03,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:03,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:03,767 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 [2022-01-18 16:45:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:45:03,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:45:04,216 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:45:04,216 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 [2022-01-18 16:45:04,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:04,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:04,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:04,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:04,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:04,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:04,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:04,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:04,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:04,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:04,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:04,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:04,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:04,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:04,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:04,827 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 [2022-01-18 16:45:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:45:04,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368622410] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:45:04,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:45:04,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-01-18 16:45:04,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752796523] [2022-01-18 16:45:04,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:45:04,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:45:04,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:45:04,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:45:04,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:45:04,861 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) [2022-01-18 16:45:07,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:45:07,976 INFO L93 Difference]: Finished difference Result 5992 states and 14766 transitions. [2022-01-18 16:45:07,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 16:45:07,977 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 [2022-01-18 16:45:07,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:45:07,985 INFO L225 Difference]: With dead ends: 5992 [2022-01-18 16:45:07,986 INFO L226 Difference]: Without dead ends: 5976 [2022-01-18 16:45:07,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1973 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=829, Invalid=6481, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 16:45:07,986 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 237 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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 [2022-01-18 16:45:07,986 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] [2022-01-18 16:45:07,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5976 states. [2022-01-18 16:45:08,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5976 to 4474. [2022-01-18 16:45:08,046 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) [2022-01-18 16:45:08,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 11321 transitions. [2022-01-18 16:45:08,054 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 11321 transitions. Word has length 30 [2022-01-18 16:45:08,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:45:08,054 INFO L470 AbstractCegarLoop]: Abstraction has 4474 states and 11321 transitions. [2022-01-18 16:45:08,054 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) [2022-01-18 16:45:08,054 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 11321 transitions. [2022-01-18 16:45:08,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:45:08,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:45:08,059 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:45:08,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-18 16:45:08,259 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 [2022-01-18 16:45:08,259 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:45:08,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:45:08,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1499462230, now seen corresponding path program 86 times [2022-01-18 16:45:08,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:45:08,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635082396] [2022-01-18 16:45:08,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:45:08,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:45:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:45:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:45:08,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:45:08,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635082396] [2022-01-18 16:45:08,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635082396] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:45:08,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288527824] [2022-01-18 16:45:08,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:45:08,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:45:08,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:45:08,612 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) [2022-01-18 16:45:08,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 16:45:08,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:45:08,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:45:08,637 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:45:08,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:45:09,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:09,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:09,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:09,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:09,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:09,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:09,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:09,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:09,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:09,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:09,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:09,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:09,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:09,070 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 [2022-01-18 16:45:09,097 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:45:09,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:45:09,486 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:45:09,487 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 [2022-01-18 16:45:09,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:09,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:09,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:09,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:09,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:09,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:09,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:09,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:09,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:09,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:09,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:09,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:09,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:09,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:09,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:09,855 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 [2022-01-18 16:45:09,890 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:45:09,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288527824] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:45:09,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:45:09,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-01-18 16:45:09,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039588859] [2022-01-18 16:45:09,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:45:09,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:45:09,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:45:09,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:45:09,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:45:09,891 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) [2022-01-18 16:45:12,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:45:12,252 INFO L93 Difference]: Finished difference Result 6009 states and 14790 transitions. [2022-01-18 16:45:12,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 16:45:12,253 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 [2022-01-18 16:45:12,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:45:12,260 INFO L225 Difference]: With dead ends: 6009 [2022-01-18 16:45:12,260 INFO L226 Difference]: Without dead ends: 5943 [2022-01-18 16:45:12,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=761, Invalid=4641, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 16:45:12,261 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 [2022-01-18 16:45:12,261 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] [2022-01-18 16:45:12,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5943 states. [2022-01-18 16:45:12,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5943 to 4546. [2022-01-18 16:45:12,310 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) [2022-01-18 16:45:12,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4546 states to 4546 states and 11479 transitions. [2022-01-18 16:45:12,343 INFO L78 Accepts]: Start accepts. Automaton has 4546 states and 11479 transitions. Word has length 30 [2022-01-18 16:45:12,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:45:12,343 INFO L470 AbstractCegarLoop]: Abstraction has 4546 states and 11479 transitions. [2022-01-18 16:45:12,343 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) [2022-01-18 16:45:12,343 INFO L276 IsEmpty]: Start isEmpty. Operand 4546 states and 11479 transitions. [2022-01-18 16:45:12,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:45:12,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:45:12,347 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:45:12,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-01-18 16:45:12,547 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 [2022-01-18 16:45:12,548 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:45:12,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:45:12,548 INFO L85 PathProgramCache]: Analyzing trace with hash -2043738198, now seen corresponding path program 87 times [2022-01-18 16:45:12,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:45:12,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337668091] [2022-01-18 16:45:12,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:45:12,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:45:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:45:12,775 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:45:12,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:45:12,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337668091] [2022-01-18 16:45:12,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337668091] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:45:12,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648574317] [2022-01-18 16:45:12,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:45:12,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:45:12,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:45:12,776 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) [2022-01-18 16:45:12,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 16:45:12,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 16:45:12,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:45:12,797 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:45:12,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:45:13,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:13,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:13,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:13,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:13,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:13,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:13,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:13,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:13,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:13,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:13,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:13,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:13,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:13,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:13,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:13,367 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:45:13,367 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 [2022-01-18 16:45:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:45:13,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:45:14,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:14,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:14,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:14,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:14,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:14,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:14,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:14,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:14,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:14,346 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:45:14,346 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 [2022-01-18 16:45:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:45:27,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648574317] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:45:27,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:45:27,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 40 [2022-01-18 16:45:27,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657466674] [2022-01-18 16:45:27,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:45:27,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:45:27,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:45:27,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:45:27,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:45:27,583 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) [2022-01-18 16:45:36,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:45:36,079 INFO L93 Difference]: Finished difference Result 6617 states and 15855 transitions. [2022-01-18 16:45:36,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-18 16:45:36,080 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 [2022-01-18 16:45:36,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:45:36,089 INFO L225 Difference]: With dead ends: 6617 [2022-01-18 16:45:36,089 INFO L226 Difference]: Without dead ends: 6583 [2022-01-18 16:45:36,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 31 SyntacticMatches, 8 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6498 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=2782, Invalid=16678, Unknown=0, NotChecked=0, Total=19460 [2022-01-18 16:45:36,090 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, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:45:36,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 502 Invalid, 2411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1378 Invalid, 0 Unknown, 872 Unchecked, 0.9s Time] [2022-01-18 16:45:36,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2022-01-18 16:45:36,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 4542. [2022-01-18 16:45:36,167 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) [2022-01-18 16:45:36,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4542 states to 4542 states and 11453 transitions. [2022-01-18 16:45:36,174 INFO L78 Accepts]: Start accepts. Automaton has 4542 states and 11453 transitions. Word has length 30 [2022-01-18 16:45:36,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:45:36,175 INFO L470 AbstractCegarLoop]: Abstraction has 4542 states and 11453 transitions. [2022-01-18 16:45:36,175 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) [2022-01-18 16:45:36,175 INFO L276 IsEmpty]: Start isEmpty. Operand 4542 states and 11453 transitions. [2022-01-18 16:45:36,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:45:36,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:45:36,179 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:45:36,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-01-18 16:45:36,379 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 [2022-01-18 16:45:36,380 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:45:36,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:45:36,380 INFO L85 PathProgramCache]: Analyzing trace with hash -761180122, now seen corresponding path program 88 times [2022-01-18 16:45:36,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:45:36,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890773776] [2022-01-18 16:45:36,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:45:36,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:45:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:45:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:45:36,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:45:36,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890773776] [2022-01-18 16:45:36,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890773776] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:45:36,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938655784] [2022-01-18 16:45:36,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:45:36,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:45:36,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:45:36,644 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) [2022-01-18 16:45:36,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 16:45:36,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:45:36,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:45:36,667 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:45:36,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:45:37,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:37,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:37,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:37,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:37,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:37,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:37,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:37,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:37,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:37,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:37,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:37,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:37,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:37,056 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 [2022-01-18 16:45:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:45:37,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:45:37,440 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:45:37,441 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 [2022-01-18 16:45:37,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:37,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:37,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:37,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:37,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:37,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:37,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:37,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:37,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:37,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:37,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:37,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:37,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:37,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:38,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:38,000 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 [2022-01-18 16:45:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:45:38,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938655784] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:45:38,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:45:38,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 29 [2022-01-18 16:45:38,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529862808] [2022-01-18 16:45:38,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:45:38,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:45:38,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:45:38,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:45:38,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:45:38,039 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) [2022-01-18 16:45:40,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:45:40,175 INFO L93 Difference]: Finished difference Result 5404 states and 13338 transitions. [2022-01-18 16:45:40,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 16:45:40,175 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 [2022-01-18 16:45:40,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:45:40,184 INFO L225 Difference]: With dead ends: 5404 [2022-01-18 16:45:40,185 INFO L226 Difference]: Without dead ends: 5348 [2022-01-18 16:45:40,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=732, Invalid=4670, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 16:45:40,186 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 [2022-01-18 16:45:40,186 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] [2022-01-18 16:45:40,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5348 states. [2022-01-18 16:45:40,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5348 to 4711. [2022-01-18 16:45:40,266 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) [2022-01-18 16:45:40,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4711 states to 4711 states and 11807 transitions. [2022-01-18 16:45:40,274 INFO L78 Accepts]: Start accepts. Automaton has 4711 states and 11807 transitions. Word has length 30 [2022-01-18 16:45:40,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:45:40,274 INFO L470 AbstractCegarLoop]: Abstraction has 4711 states and 11807 transitions. [2022-01-18 16:45:40,274 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) [2022-01-18 16:45:40,274 INFO L276 IsEmpty]: Start isEmpty. Operand 4711 states and 11807 transitions. [2022-01-18 16:45:40,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:45:40,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:45:40,279 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:45:40,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-01-18 16:45:40,479 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 [2022-01-18 16:45:40,480 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:45:40,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:45:40,481 INFO L85 PathProgramCache]: Analyzing trace with hash 295507822, now seen corresponding path program 89 times [2022-01-18 16:45:40,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:45:40,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625656528] [2022-01-18 16:45:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:45:40,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:45:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:45:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:45:40,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:45:40,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625656528] [2022-01-18 16:45:40,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625656528] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:45:40,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400035493] [2022-01-18 16:45:40,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:45:40,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:45:40,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:45:40,750 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) [2022-01-18 16:45:40,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 16:45:40,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 16:45:40,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:45:40,771 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:45:40,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:45:41,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:41,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:41,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:41,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:41,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:41,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:41,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:41,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:41,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:41,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:41,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:41,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:41,158 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 [2022-01-18 16:45:41,180 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:45:41,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:45:41,544 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:45:41,544 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 [2022-01-18 16:45:41,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:41,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:41,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:41,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:41,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:41,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:41,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:41,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:41,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:41,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:41,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:41,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:41,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:41,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:41,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:41,971 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 [2022-01-18 16:45:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:45:42,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400035493] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:45:42,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:45:42,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 29 [2022-01-18 16:45:42,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227103314] [2022-01-18 16:45:42,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:45:42,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:45:42,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:45:42,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:45:42,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:45:42,010 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) [2022-01-18 16:45:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:45:43,939 INFO L93 Difference]: Finished difference Result 5352 states and 13141 transitions. [2022-01-18 16:45:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 16:45:43,939 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 [2022-01-18 16:45:43,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:45:43,946 INFO L225 Difference]: With dead ends: 5352 [2022-01-18 16:45:43,946 INFO L226 Difference]: Without dead ends: 5345 [2022-01-18 16:45:43,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=642, Invalid=3914, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 16:45:43,947 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 [2022-01-18 16:45:43,947 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] [2022-01-18 16:45:43,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5345 states. [2022-01-18 16:45:44,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5345 to 4709. [2022-01-18 16:45:44,008 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) [2022-01-18 16:45:44,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4709 states to 4709 states and 11804 transitions. [2022-01-18 16:45:44,015 INFO L78 Accepts]: Start accepts. Automaton has 4709 states and 11804 transitions. Word has length 30 [2022-01-18 16:45:44,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:45:44,015 INFO L470 AbstractCegarLoop]: Abstraction has 4709 states and 11804 transitions. [2022-01-18 16:45:44,015 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) [2022-01-18 16:45:44,015 INFO L276 IsEmpty]: Start isEmpty. Operand 4709 states and 11804 transitions. [2022-01-18 16:45:44,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:45:44,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:45:44,020 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:45:44,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-01-18 16:45:44,220 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 [2022-01-18 16:45:44,220 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:45:44,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:45:44,221 INFO L85 PathProgramCache]: Analyzing trace with hash 181205862, now seen corresponding path program 90 times [2022-01-18 16:45:44,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:45:44,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456777140] [2022-01-18 16:45:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:45:44,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:45:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:45:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:45:44,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:45:44,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456777140] [2022-01-18 16:45:44,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456777140] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:45:44,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453121163] [2022-01-18 16:45:44,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:45:44,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:45:44,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:45:44,474 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) [2022-01-18 16:45:44,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 16:45:44,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 16:45:44,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:45:44,495 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:45:44,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:45:45,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:45,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:45,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:45,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:45,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:45,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:45:45,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:45,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:45:45,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:45:45,056 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 [2022-01-18 16:45:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:45:45,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:45:47,065 INFO L353 Elim1Store]: treesize reduction 76, result has 73.0 percent of original size [2022-01-18 16:45:47,066 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 [2022-01-18 16:46:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:46:38,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453121163] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:46:38,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:46:38,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 40 [2022-01-18 16:46:38,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901421165] [2022-01-18 16:46:38,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:46:38,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:46:38,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:46:38,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:46:38,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:46:38,730 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) [2022-01-18 16:46:47,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:46:47,261 INFO L93 Difference]: Finished difference Result 9227 states and 22664 transitions. [2022-01-18 16:46:47,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-18 16:46:47,262 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 [2022-01-18 16:46:47,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:46:47,274 INFO L225 Difference]: With dead ends: 9227 [2022-01-18 16:46:47,274 INFO L226 Difference]: Without dead ends: 9183 [2022-01-18 16:46:47,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 33 SyntacticMatches, 20 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7482 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=2589, Invalid=15771, Unknown=0, NotChecked=0, Total=18360 [2022-01-18 16:46:47,275 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 [2022-01-18 16:46:47,276 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] [2022-01-18 16:46:47,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9183 states. [2022-01-18 16:46:47,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9183 to 6044. [2022-01-18 16:46:47,366 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) [2022-01-18 16:46:47,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6044 states to 6044 states and 15192 transitions. [2022-01-18 16:46:47,376 INFO L78 Accepts]: Start accepts. Automaton has 6044 states and 15192 transitions. Word has length 30 [2022-01-18 16:46:47,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:46:47,376 INFO L470 AbstractCegarLoop]: Abstraction has 6044 states and 15192 transitions. [2022-01-18 16:46:47,376 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) [2022-01-18 16:46:47,376 INFO L276 IsEmpty]: Start isEmpty. Operand 6044 states and 15192 transitions. [2022-01-18 16:46:47,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:46:47,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:46:47,383 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:46:47,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-01-18 16:46:47,583 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 [2022-01-18 16:46:47,583 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:46:47,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:46:47,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1549563870, now seen corresponding path program 91 times [2022-01-18 16:46:47,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:46:47,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119212450] [2022-01-18 16:46:47,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:46:47,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:46:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:46:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:46:47,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:46:47,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119212450] [2022-01-18 16:46:47,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119212450] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:46:47,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682831003] [2022-01-18 16:46:47,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:46:47,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:46:47,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:46:47,913 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) [2022-01-18 16:46:47,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 16:46:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:46:47,950 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:46:47,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:46:48,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:48,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:48,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:48,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:48,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:48,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:48,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:48,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:48,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:48,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:48,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:48,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:48,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:48,326 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 [2022-01-18 16:46:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:46:48,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:46:48,772 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:46:48,772 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 [2022-01-18 16:46:49,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:49,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:49,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:49,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:49,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:49,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:49,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:49,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:49,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:49,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:49,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:49,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:49,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:49,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:49,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:49,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 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 [2022-01-18 16:46:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:46:49,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682831003] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:46:49,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:46:49,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-01-18 16:46:49,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285340001] [2022-01-18 16:46:49,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:46:49,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:46:49,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:46:49,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:46:49,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:46:49,432 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) [2022-01-18 16:46:52,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:46:52,483 INFO L93 Difference]: Finished difference Result 7098 states and 17655 transitions. [2022-01-18 16:46:52,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 16:46:52,483 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 [2022-01-18 16:46:52,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:46:52,493 INFO L225 Difference]: With dead ends: 7098 [2022-01-18 16:46:52,493 INFO L226 Difference]: Without dead ends: 7052 [2022-01-18 16:46:52,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2046 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=931, Invalid=6209, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 16:46:52,494 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 [2022-01-18 16:46:52,494 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] [2022-01-18 16:46:52,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7052 states. [2022-01-18 16:46:52,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7052 to 5783. [2022-01-18 16:46:52,571 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) [2022-01-18 16:46:52,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5783 states to 5783 states and 14485 transitions. [2022-01-18 16:46:52,581 INFO L78 Accepts]: Start accepts. Automaton has 5783 states and 14485 transitions. Word has length 30 [2022-01-18 16:46:52,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:46:52,581 INFO L470 AbstractCegarLoop]: Abstraction has 5783 states and 14485 transitions. [2022-01-18 16:46:52,581 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) [2022-01-18 16:46:52,581 INFO L276 IsEmpty]: Start isEmpty. Operand 5783 states and 14485 transitions. [2022-01-18 16:46:52,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:46:52,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:46:52,588 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:46:52,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-01-18 16:46:52,788 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 [2022-01-18 16:46:52,789 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:46:52,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:46:52,789 INFO L85 PathProgramCache]: Analyzing trace with hash 846912614, now seen corresponding path program 92 times [2022-01-18 16:46:52,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:46:52,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472723766] [2022-01-18 16:46:52,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:46:52,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:46:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:46:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:46:53,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:46:53,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472723766] [2022-01-18 16:46:53,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472723766] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:46:53,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431059539] [2022-01-18 16:46:53,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:46:53,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:46:53,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:46:53,054 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) [2022-01-18 16:46:53,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 16:46:53,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:46:53,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:46:53,074 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:46:53,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:46:53,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:53,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:53,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:53,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:53,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:53,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:53,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:53,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:53,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:53,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:53,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:53,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:53,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:53,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:53,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:53,440 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 [2022-01-18 16:46:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:46:53,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:46:53,874 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:46:53,875 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 [2022-01-18 16:46:54,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:54,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:54,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:54,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:54,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:54,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:54,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:54,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:54,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:54,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:54,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:54,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:54,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:54,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:54,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:54,252 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 [2022-01-18 16:46:54,290 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:46:54,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431059539] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:46:54,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:46:54,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-01-18 16:46:54,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526906096] [2022-01-18 16:46:54,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:46:54,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:46:54,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:46:54,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:46:54,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:46:54,292 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) [2022-01-18 16:46:57,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:46:57,268 INFO L93 Difference]: Finished difference Result 7282 states and 18026 transitions. [2022-01-18 16:46:57,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 16:46:57,269 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 [2022-01-18 16:46:57,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:46:57,279 INFO L225 Difference]: With dead ends: 7282 [2022-01-18 16:46:57,279 INFO L226 Difference]: Without dead ends: 7252 [2022-01-18 16:46:57,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=806, Invalid=5674, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 16:46:57,280 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 [2022-01-18 16:46:57,280 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] [2022-01-18 16:46:57,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7252 states. [2022-01-18 16:46:57,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7252 to 5867. [2022-01-18 16:46:57,349 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) [2022-01-18 16:46:57,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5867 states to 5867 states and 14738 transitions. [2022-01-18 16:46:57,357 INFO L78 Accepts]: Start accepts. Automaton has 5867 states and 14738 transitions. Word has length 30 [2022-01-18 16:46:57,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:46:57,357 INFO L470 AbstractCegarLoop]: Abstraction has 5867 states and 14738 transitions. [2022-01-18 16:46:57,357 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) [2022-01-18 16:46:57,357 INFO L276 IsEmpty]: Start isEmpty. Operand 5867 states and 14738 transitions. [2022-01-18 16:46:57,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:46:57,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:46:57,363 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:46:57,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-01-18 16:46:57,563 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 [2022-01-18 16:46:57,563 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:46:57,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:46:57,564 INFO L85 PathProgramCache]: Analyzing trace with hash 968145010, now seen corresponding path program 93 times [2022-01-18 16:46:57,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:46:57,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903408295] [2022-01-18 16:46:57,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:46:57,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:46:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:46:57,918 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:46:57,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:46:57,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903408295] [2022-01-18 16:46:57,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903408295] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:46:57,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238466559] [2022-01-18 16:46:57,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:46:57,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:46:57,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:46:57,924 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) [2022-01-18 16:46:57,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 16:46:57,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:46:57,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:46:57,959 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:46:57,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:46:58,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:58,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:58,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:58,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:58,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:58,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:46:58,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:58,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:46:58,742 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 [2022-01-18 16:46:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:46:58,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:00,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:00,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:01,180 INFO L353 Elim1Store]: treesize reduction 44, result has 83.1 percent of original size [2022-01-18 16:47:01,181 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 [2022-01-18 16:47:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:40,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238466559] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:40,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:40,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-01-18 16:47:40,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723503138] [2022-01-18 16:47:40,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:40,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:47:40,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:40,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:47:40,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:47:40,062 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) [2022-01-18 16:47:42,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:42,941 INFO L93 Difference]: Finished difference Result 8982 states and 21661 transitions. [2022-01-18 16:47:42,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 16:47:42,942 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 [2022-01-18 16:47:42,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:42,955 INFO L225 Difference]: With dead ends: 8982 [2022-01-18 16:47:42,955 INFO L226 Difference]: Without dead ends: 8935 [2022-01-18 16:47:42,955 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 [2022-01-18 16:47:42,956 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 [2022-01-18 16:47:42,956 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] [2022-01-18 16:47:42,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8935 states. [2022-01-18 16:47:43,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8935 to 5939. [2022-01-18 16:47:43,030 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) [2022-01-18 16:47:43,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 14884 transitions. [2022-01-18 16:47:43,039 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 14884 transitions. Word has length 30 [2022-01-18 16:47:43,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:43,039 INFO L470 AbstractCegarLoop]: Abstraction has 5939 states and 14884 transitions. [2022-01-18 16:47:43,039 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) [2022-01-18 16:47:43,039 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 14884 transitions. [2022-01-18 16:47:43,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:47:43,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:43,044 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:43,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-01-18 16:47:43,245 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 [2022-01-18 16:47:43,245 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:47:43,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:43,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1672644370, now seen corresponding path program 94 times [2022-01-18 16:47:43,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:43,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410139085] [2022-01-18 16:47:43,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:43,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:43,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:43,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:43,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410139085] [2022-01-18 16:47:43,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410139085] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:43,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681829894] [2022-01-18 16:47:43,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:47:43,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:43,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:43,526 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) [2022-01-18 16:47:43,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 16:47:43,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:47:43,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:43,549 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:47:43,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:43,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:43,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:43,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:43,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:43,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:43,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:43,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:43,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:43,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:43,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:43,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:43,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:43,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:43,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:43,957 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 [2022-01-18 16:47:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:43,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:44,350 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:47:44,350 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 [2022-01-18 16:47:44,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:44,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:44,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:44,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:44,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:44,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:44,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:44,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:44,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:44,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:44,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:44,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:44,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:44,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:44,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:44,674 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 [2022-01-18 16:47:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:44,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681829894] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:44,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:44,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-01-18 16:47:44,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229714107] [2022-01-18 16:47:44,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:44,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:47:44,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:44,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:47:44,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:47:44,709 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) [2022-01-18 16:47:46,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:46,753 INFO L93 Difference]: Finished difference Result 7445 states and 18245 transitions. [2022-01-18 16:47:46,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 16:47:46,753 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 [2022-01-18 16:47:46,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:46,763 INFO L225 Difference]: With dead ends: 7445 [2022-01-18 16:47:46,763 INFO L226 Difference]: Without dead ends: 7397 [2022-01-18 16:47:46,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1747 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=778, Invalid=4772, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 16:47:46,764 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 [2022-01-18 16:47:46,764 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] [2022-01-18 16:47:46,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7397 states. [2022-01-18 16:47:46,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7397 to 5905. [2022-01-18 16:47:46,849 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) [2022-01-18 16:47:46,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5905 states to 5905 states and 14788 transitions. [2022-01-18 16:47:46,858 INFO L78 Accepts]: Start accepts. Automaton has 5905 states and 14788 transitions. Word has length 30 [2022-01-18 16:47:46,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:46,858 INFO L470 AbstractCegarLoop]: Abstraction has 5905 states and 14788 transitions. [2022-01-18 16:47:46,858 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) [2022-01-18 16:47:46,858 INFO L276 IsEmpty]: Start isEmpty. Operand 5905 states and 14788 transitions. [2022-01-18 16:47:46,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:47:46,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:46,864 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:46,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-01-18 16:47:47,064 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 [2022-01-18 16:47:47,064 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:47:47,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:47,066 INFO L85 PathProgramCache]: Analyzing trace with hash -298602706, now seen corresponding path program 95 times [2022-01-18 16:47:47,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:47,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824576488] [2022-01-18 16:47:47,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:47,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:47,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:47,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824576488] [2022-01-18 16:47:47,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824576488] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:47,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303862853] [2022-01-18 16:47:47,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:47:47,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:47,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:47,303 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) [2022-01-18 16:47:47,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 16:47:47,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 16:47:47,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:47,324 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:47:47,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:47,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:47,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:47,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:47,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:47,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:47,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:47,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:47,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:47,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:47,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:47,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:47,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:47,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:47,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:47,714 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 [2022-01-18 16:47:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:47,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:48,114 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:47:48,114 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 [2022-01-18 16:47:48,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:48,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:48,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:48,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:48,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:48,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:48,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:48,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:48,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:48,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:48,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:48,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:48,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:48,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:48,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:48,596 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 [2022-01-18 16:47:48,632 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:48,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303862853] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:48,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:48,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 16:47:48,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373125268] [2022-01-18 16:47:48,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:48,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:47:48,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:48,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:47:48,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:47:48,633 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) [2022-01-18 16:47:50,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:50,396 INFO L93 Difference]: Finished difference Result 6938 states and 17086 transitions. [2022-01-18 16:47:50,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 16:47:50,396 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 [2022-01-18 16:47:50,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:50,405 INFO L225 Difference]: With dead ends: 6938 [2022-01-18 16:47:50,405 INFO L226 Difference]: Without dead ends: 6880 [2022-01-18 16:47:50,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=461, Invalid=3445, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 16:47:50,406 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 [2022-01-18 16:47:50,406 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] [2022-01-18 16:47:50,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6880 states. [2022-01-18 16:47:50,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6880 to 6284. [2022-01-18 16:47:50,473 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) [2022-01-18 16:47:50,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6284 states to 6284 states and 15772 transitions. [2022-01-18 16:47:50,482 INFO L78 Accepts]: Start accepts. Automaton has 6284 states and 15772 transitions. Word has length 30 [2022-01-18 16:47:50,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:50,483 INFO L470 AbstractCegarLoop]: Abstraction has 6284 states and 15772 transitions. [2022-01-18 16:47:50,483 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) [2022-01-18 16:47:50,483 INFO L276 IsEmpty]: Start isEmpty. Operand 6284 states and 15772 transitions. [2022-01-18 16:47:50,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:47:50,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:50,488 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:50,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-01-18 16:47:50,689 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 [2022-01-18 16:47:50,689 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:47:50,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:50,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1926341354, now seen corresponding path program 96 times [2022-01-18 16:47:50,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:50,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110270544] [2022-01-18 16:47:50,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:50,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:50,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:50,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110270544] [2022-01-18 16:47:50,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110270544] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:50,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594859940] [2022-01-18 16:47:50,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:47:50,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:50,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:50,951 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) [2022-01-18 16:47:50,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 16:47:50,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 16:47:50,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:50,973 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:47:50,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:51,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:51,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:51,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:51,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:51,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:51,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:51,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:51,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:51,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:47:51,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:47:51,516 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 [2022-01-18 16:47:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:51,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:53,718 INFO L353 Elim1Store]: treesize reduction 76, result has 73.0 percent of original size [2022-01-18 16:47:53,719 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 [2022-01-18 16:49:08,379 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:08,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594859940] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:49:08,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:49:08,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 39 [2022-01-18 16:49:08,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847322083] [2022-01-18 16:49:08,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:49:08,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:49:08,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:49:08,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:49:08,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:49:08,380 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) [2022-01-18 16:49:15,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:49:15,127 INFO L93 Difference]: Finished difference Result 10837 states and 26549 transitions. [2022-01-18 16:49:15,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 16:49:15,128 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 [2022-01-18 16:49:15,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:49:15,141 INFO L225 Difference]: With dead ends: 10837 [2022-01-18 16:49:15,141 INFO L226 Difference]: Without dead ends: 10791 [2022-01-18 16:49:15,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 36 SyntacticMatches, 27 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 4633 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1554, Invalid=10218, Unknown=0, NotChecked=0, Total=11772 [2022-01-18 16:49:15,142 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 [2022-01-18 16:49:15,142 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] [2022-01-18 16:49:15,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10791 states. [2022-01-18 16:49:15,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10791 to 6996. [2022-01-18 16:49:15,235 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) [2022-01-18 16:49:15,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6996 states to 6996 states and 17573 transitions. [2022-01-18 16:49:15,245 INFO L78 Accepts]: Start accepts. Automaton has 6996 states and 17573 transitions. Word has length 30 [2022-01-18 16:49:15,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:49:15,245 INFO L470 AbstractCegarLoop]: Abstraction has 6996 states and 17573 transitions. [2022-01-18 16:49:15,245 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) [2022-01-18 16:49:15,245 INFO L276 IsEmpty]: Start isEmpty. Operand 6996 states and 17573 transitions. [2022-01-18 16:49:15,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:49:15,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:49:15,252 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:49:15,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-01-18 16:49:15,453 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 [2022-01-18 16:49:15,453 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:49:15,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:49:15,454 INFO L85 PathProgramCache]: Analyzing trace with hash 871858922, now seen corresponding path program 97 times [2022-01-18 16:49:15,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:49:15,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535582420] [2022-01-18 16:49:15,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:49:15,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:49:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:49:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:15,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:49:15,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535582420] [2022-01-18 16:49:15,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535582420] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:49:15,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257226364] [2022-01-18 16:49:15,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:49:15,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:15,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:49:15,801 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) [2022-01-18 16:49:15,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 16:49:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:49:15,831 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:49:15,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:49:16,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:16,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:16,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:16,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:16,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:16,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:16,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:16,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:16,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:16,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:16,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:16,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:16,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:16,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:16,222 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 [2022-01-18 16:49:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:16,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:49:16,653 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:49:16,653 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 [2022-01-18 16:49:17,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:17,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:17,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:17,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:17,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:17,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:17,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:17,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:17,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:17,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:17,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:17,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:17,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:17,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:17,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:17,086 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 [2022-01-18 16:49:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:17,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257226364] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:49:17,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:49:17,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-01-18 16:49:17,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095431662] [2022-01-18 16:49:17,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:49:17,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:49:17,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:49:17,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:49:17,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:49:17,122 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) [2022-01-18 16:49:20,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:49:20,798 INFO L93 Difference]: Finished difference Result 10236 states and 25134 transitions. [2022-01-18 16:49:20,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 16:49:20,799 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 [2022-01-18 16:49:20,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:49:20,813 INFO L225 Difference]: With dead ends: 10236 [2022-01-18 16:49:20,813 INFO L226 Difference]: Without dead ends: 10148 [2022-01-18 16:49:20,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2748 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1148, Invalid=7972, Unknown=0, NotChecked=0, Total=9120 [2022-01-18 16:49:20,814 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 [2022-01-18 16:49:20,814 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] [2022-01-18 16:49:20,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10148 states. [2022-01-18 16:49:20,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10148 to 6838. [2022-01-18 16:49:20,926 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) [2022-01-18 16:49:20,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6838 states to 6838 states and 17138 transitions. [2022-01-18 16:49:20,937 INFO L78 Accepts]: Start accepts. Automaton has 6838 states and 17138 transitions. Word has length 30 [2022-01-18 16:49:20,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:49:20,937 INFO L470 AbstractCegarLoop]: Abstraction has 6838 states and 17138 transitions. [2022-01-18 16:49:20,937 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) [2022-01-18 16:49:20,937 INFO L276 IsEmpty]: Start isEmpty. Operand 6838 states and 17138 transitions. [2022-01-18 16:49:20,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:49:20,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:49:20,944 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:49:20,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-01-18 16:49:21,144 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 [2022-01-18 16:49:21,144 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:49:21,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:49:21,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1702919190, now seen corresponding path program 98 times [2022-01-18 16:49:21,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:49:21,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941474717] [2022-01-18 16:49:21,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:49:21,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:49:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:49:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:49:21,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:49:21,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941474717] [2022-01-18 16:49:21,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941474717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:49:21,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675616261] [2022-01-18 16:49:21,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:49:21,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:21,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:49:21,398 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) [2022-01-18 16:49:21,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 16:49:21,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:49:21,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:49:21,418 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:49:21,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:49:21,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:21,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:21,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:21,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:21,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:21,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:21,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:21,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:21,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:21,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:21,776 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 [2022-01-18 16:49:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:21,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:49:22,215 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:49:22,215 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 [2022-01-18 16:49:22,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:22,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:22,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:22,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:22,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:22,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:22,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:22,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:22,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:22,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:22,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:22,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:22,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:22,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:22,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:22,685 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 [2022-01-18 16:49:22,721 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:22,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675616261] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:49:22,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:49:22,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-01-18 16:49:22,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943773291] [2022-01-18 16:49:22,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:49:22,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:49:22,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:49:22,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:49:22,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:49:22,722 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) [2022-01-18 16:49:26,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:49:26,100 INFO L93 Difference]: Finished difference Result 8248 states and 20512 transitions. [2022-01-18 16:49:26,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 16:49:26,101 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 [2022-01-18 16:49:26,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:49:26,112 INFO L225 Difference]: With dead ends: 8248 [2022-01-18 16:49:26,112 INFO L226 Difference]: Without dead ends: 8172 [2022-01-18 16:49:26,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1929 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=862, Invalid=6448, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 16:49:26,113 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, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:49:26,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 296 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1637 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 16:49:26,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8172 states. [2022-01-18 16:49:26,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8172 to 6987. [2022-01-18 16:49:26,192 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) [2022-01-18 16:49:26,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6987 states to 6987 states and 17502 transitions. [2022-01-18 16:49:26,203 INFO L78 Accepts]: Start accepts. Automaton has 6987 states and 17502 transitions. Word has length 30 [2022-01-18 16:49:26,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:49:26,203 INFO L470 AbstractCegarLoop]: Abstraction has 6987 states and 17502 transitions. [2022-01-18 16:49:26,203 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) [2022-01-18 16:49:26,203 INFO L276 IsEmpty]: Start isEmpty. Operand 6987 states and 17502 transitions. [2022-01-18 16:49:26,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:49:26,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:49:26,210 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:49:26,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-01-18 16:49:26,410 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 [2022-01-18 16:49:26,411 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:49:26,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:49:26,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1908857622, now seen corresponding path program 99 times [2022-01-18 16:49:26,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:49:26,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492003472] [2022-01-18 16:49:26,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:49:26,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:49:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:49:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:26,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:49:26,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492003472] [2022-01-18 16:49:26,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492003472] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:49:26,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890302787] [2022-01-18 16:49:26,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:49:26,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:26,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:49:26,742 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) [2022-01-18 16:49:26,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 16:49:26,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 16:49:26,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:49:26,763 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:49:26,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:49:27,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:27,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:27,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:27,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:27,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:49:27,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:27,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:49:27,522 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 [2022-01-18 16:49:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:35,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:49:36,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:36,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:49:36,939 INFO L353 Elim1Store]: treesize reduction 44, result has 83.1 percent of original size [2022-01-18 16:49:36,940 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 [2022-01-18 16:50:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:33,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890302787] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:50:33,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:50:33,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 40 [2022-01-18 16:50:33,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423385197] [2022-01-18 16:50:33,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:50:33,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:50:33,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:50:33,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:50:33,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:50:33,873 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) [2022-01-18 16:50:40,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:50:40,015 INFO L93 Difference]: Finished difference Result 9822 states and 24035 transitions. [2022-01-18 16:50:40,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-18 16:50:40,015 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 [2022-01-18 16:50:40,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:50:40,028 INFO L225 Difference]: With dead ends: 9822 [2022-01-18 16:50:40,028 INFO L226 Difference]: Without dead ends: 9757 [2022-01-18 16:50:40,029 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 [2022-01-18 16:50:40,030 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 [2022-01-18 16:50:40,030 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] [2022-01-18 16:50:40,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9757 states. [2022-01-18 16:50:40,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9757 to 7259. [2022-01-18 16:50:40,119 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) [2022-01-18 16:50:40,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7259 states to 7259 states and 18129 transitions. [2022-01-18 16:50:40,130 INFO L78 Accepts]: Start accepts. Automaton has 7259 states and 18129 transitions. Word has length 30 [2022-01-18 16:50:40,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:50:40,130 INFO L470 AbstractCegarLoop]: Abstraction has 7259 states and 18129 transitions. [2022-01-18 16:50:40,131 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) [2022-01-18 16:50:40,131 INFO L276 IsEmpty]: Start isEmpty. Operand 7259 states and 18129 transitions. [2022-01-18 16:50:40,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:50:40,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:50:40,138 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:50:40,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-01-18 16:50:40,338 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 [2022-01-18 16:50:40,338 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:50:40,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:50:40,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1519015272, now seen corresponding path program 100 times [2022-01-18 16:50:40,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:50:40,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456055330] [2022-01-18 16:50:40,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:50:40,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:50:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:50:40,702 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:40,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:50:40,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456055330] [2022-01-18 16:50:40,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456055330] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:50:40,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998800098] [2022-01-18 16:50:40,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:50:40,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:50:40,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:50:40,704 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) [2022-01-18 16:50:40,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 16:50:40,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:50:40,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:50:40,727 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:50:40,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:50:41,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:41,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:41,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:41,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:41,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:41,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:41,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:41,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:41,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:41,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:41,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:41,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:41,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:41,093 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 [2022-01-18 16:50:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:41,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:50:41,541 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:50:41,541 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 [2022-01-18 16:50:41,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:41,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:41,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:41,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:41,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:41,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:41,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:41,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:41,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:41,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:41,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:41,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:41,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:41,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:41,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:41,964 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 [2022-01-18 16:50:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:42,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998800098] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:50:42,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:50:42,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-01-18 16:50:42,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012071755] [2022-01-18 16:50:42,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:50:42,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:50:42,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:50:42,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:50:42,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:50:42,004 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) [2022-01-18 16:50:45,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:50:45,446 INFO L93 Difference]: Finished difference Result 8399 states and 20728 transitions. [2022-01-18 16:50:45,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 16:50:45,446 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 [2022-01-18 16:50:45,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:50:45,457 INFO L225 Difference]: With dead ends: 8399 [2022-01-18 16:50:45,457 INFO L226 Difference]: Without dead ends: 8322 [2022-01-18 16:50:45,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1923 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=798, Invalid=6684, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 16:50:45,458 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 [2022-01-18 16:50:45,458 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] [2022-01-18 16:50:45,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8322 states. [2022-01-18 16:50:45,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8322 to 7589. [2022-01-18 16:50:45,537 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) [2022-01-18 16:50:45,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7589 states to 7589 states and 18944 transitions. [2022-01-18 16:50:45,549 INFO L78 Accepts]: Start accepts. Automaton has 7589 states and 18944 transitions. Word has length 30 [2022-01-18 16:50:45,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:50:45,549 INFO L470 AbstractCegarLoop]: Abstraction has 7589 states and 18944 transitions. [2022-01-18 16:50:45,549 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) [2022-01-18 16:50:45,549 INFO L276 IsEmpty]: Start isEmpty. Operand 7589 states and 18944 transitions. [2022-01-18 16:50:45,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:50:45,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:50:45,557 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:50:45,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-01-18 16:50:45,757 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 [2022-01-18 16:50:45,757 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:50:45,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:50:45,757 INFO L85 PathProgramCache]: Analyzing trace with hash -2041359046, now seen corresponding path program 101 times [2022-01-18 16:50:45,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:50:45,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370854912] [2022-01-18 16:50:45,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:50:45,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:50:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:50:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:46,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:50:46,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370854912] [2022-01-18 16:50:46,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370854912] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:50:46,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855311041] [2022-01-18 16:50:46,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:50:46,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:50:46,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:50:46,084 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) [2022-01-18 16:50:46,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 16:50:46,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 16:50:46,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:50:46,105 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:50:46,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:50:46,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:46,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:46,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:46,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:46,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:46,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:46,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:46,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:46,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:46,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:46,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:46,509 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 [2022-01-18 16:50:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:46,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:50:46,933 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:50:46,933 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 [2022-01-18 16:50:47,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:47,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:47,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:47,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:47,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:47,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:47,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:47,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:47,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:47,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:47,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:47,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:47,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:47,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:47,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:47,407 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 [2022-01-18 16:50:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:47,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855311041] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:50:47,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:50:47,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-01-18 16:50:47,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034414036] [2022-01-18 16:50:47,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:50:47,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:50:47,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:50:47,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:50:47,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:50:47,482 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) [2022-01-18 16:50:49,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:50:49,625 INFO L93 Difference]: Finished difference Result 9687 states and 23583 transitions. [2022-01-18 16:50:49,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:50:49,625 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 [2022-01-18 16:50:49,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:50:49,637 INFO L225 Difference]: With dead ends: 9687 [2022-01-18 16:50:49,637 INFO L226 Difference]: Without dead ends: 9645 [2022-01-18 16:50:49,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=561, Invalid=4551, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 16:50:49,638 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 [2022-01-18 16:50:49,638 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] [2022-01-18 16:50:49,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9645 states. [2022-01-18 16:50:49,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9645 to 7716. [2022-01-18 16:50:49,727 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) [2022-01-18 16:50:49,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7716 states to 7716 states and 19251 transitions. [2022-01-18 16:50:49,740 INFO L78 Accepts]: Start accepts. Automaton has 7716 states and 19251 transitions. Word has length 30 [2022-01-18 16:50:49,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:50:49,740 INFO L470 AbstractCegarLoop]: Abstraction has 7716 states and 19251 transitions. [2022-01-18 16:50:49,741 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) [2022-01-18 16:50:49,741 INFO L276 IsEmpty]: Start isEmpty. Operand 7716 states and 19251 transitions. [2022-01-18 16:50:49,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:50:49,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:50:49,748 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:50:49,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-01-18 16:50:49,949 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 [2022-01-18 16:50:49,949 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:50:49,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:50:49,949 INFO L85 PathProgramCache]: Analyzing trace with hash -552006922, now seen corresponding path program 102 times [2022-01-18 16:50:49,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:50:49,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877077131] [2022-01-18 16:50:49,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:50:49,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:50:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:50:50,300 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:50,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:50:50,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877077131] [2022-01-18 16:50:50,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877077131] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:50:50,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978146363] [2022-01-18 16:50:50,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:50:50,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:50:50,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:50:50,302 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) [2022-01-18 16:50:50,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 16:50:50,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:50:50,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:50:50,323 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:50:50,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:50:50,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:50,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:50,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:50,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:50,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:50,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:50,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:50,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:50,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:50,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:50,734 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 [2022-01-18 16:50:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:50,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:50:51,179 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:50:51,179 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 [2022-01-18 16:50:51,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:51,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:51,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:51,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:51,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:51,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:51,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:51,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:51,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:51,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:51,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:51,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:51,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:51,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:51,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:51,621 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 [2022-01-18 16:50:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:51,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978146363] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:50:51,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:50:51,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-01-18 16:50:51,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382998293] [2022-01-18 16:50:51,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:50:51,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:50:51,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:50:51,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:50:51,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:50:51,668 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) [2022-01-18 16:50:54,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:50:54,438 INFO L93 Difference]: Finished difference Result 9343 states and 22828 transitions. [2022-01-18 16:50:54,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 16:50:54,438 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 [2022-01-18 16:50:54,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:50:54,450 INFO L225 Difference]: With dead ends: 9343 [2022-01-18 16:50:54,450 INFO L226 Difference]: Without dead ends: 9253 [2022-01-18 16:50:54,451 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 [2022-01-18 16:50:54,451 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 [2022-01-18 16:50:54,451 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] [2022-01-18 16:50:54,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9253 states. [2022-01-18 16:50:54,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9253 to 7775. [2022-01-18 16:50:54,558 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) [2022-01-18 16:50:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7775 states to 7775 states and 19368 transitions. [2022-01-18 16:50:54,571 INFO L78 Accepts]: Start accepts. Automaton has 7775 states and 19368 transitions. Word has length 30 [2022-01-18 16:50:54,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:50:54,571 INFO L470 AbstractCegarLoop]: Abstraction has 7775 states and 19368 transitions. [2022-01-18 16:50:54,571 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) [2022-01-18 16:50:54,571 INFO L276 IsEmpty]: Start isEmpty. Operand 7775 states and 19368 transitions. [2022-01-18 16:50:54,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:50:54,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:50:54,579 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:50:54,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-01-18 16:50:54,779 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 [2022-01-18 16:50:54,779 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:50:54,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:50:54,780 INFO L85 PathProgramCache]: Analyzing trace with hash -387775446, now seen corresponding path program 103 times [2022-01-18 16:50:54,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:50:54,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684073116] [2022-01-18 16:50:54,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:50:54,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:50:54,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:50:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:50:55,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:50:55,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684073116] [2022-01-18 16:50:55,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684073116] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:50:55,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586672310] [2022-01-18 16:50:55,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:50:55,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:50:55,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:50:55,069 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) [2022-01-18 16:50:55,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 16:50:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:50:55,099 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:50:55,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:50:55,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:55,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:55,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:55,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:55,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:55,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:55,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:55,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:55,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:55,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:55,464 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 [2022-01-18 16:50:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:55,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:50:55,878 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:50:55,878 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 [2022-01-18 16:50:56,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:56,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:56,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:56,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:56,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:56,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:56,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:56,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:56,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:56,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:56,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:56,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:56,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:50:56,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:56,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:50:56,489 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 [2022-01-18 16:50:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:50:56,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586672310] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:50:56,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:50:56,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-01-18 16:50:56,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524388277] [2022-01-18 16:50:56,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:50:56,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:50:56,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:50:56,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:50:56,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:50:56,540 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) [2022-01-18 16:50:59,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:50:59,590 INFO L93 Difference]: Finished difference Result 9271 states and 22798 transitions. [2022-01-18 16:50:59,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 16:50:59,590 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 [2022-01-18 16:50:59,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:50:59,603 INFO L225 Difference]: With dead ends: 9271 [2022-01-18 16:50:59,603 INFO L226 Difference]: Without dead ends: 9179 [2022-01-18 16:50:59,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1012, Invalid=6128, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 16:50:59,604 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 [2022-01-18 16:50:59,604 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] [2022-01-18 16:50:59,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9179 states. [2022-01-18 16:50:59,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9179 to 8147. [2022-01-18 16:50:59,693 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) [2022-01-18 16:50:59,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8147 states to 8147 states and 20208 transitions. [2022-01-18 16:50:59,706 INFO L78 Accepts]: Start accepts. Automaton has 8147 states and 20208 transitions. Word has length 30 [2022-01-18 16:50:59,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:50:59,706 INFO L470 AbstractCegarLoop]: Abstraction has 8147 states and 20208 transitions. [2022-01-18 16:50:59,706 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) [2022-01-18 16:50:59,706 INFO L276 IsEmpty]: Start isEmpty. Operand 8147 states and 20208 transitions. [2022-01-18 16:50:59,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:50:59,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:50:59,714 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:50:59,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-01-18 16:50:59,919 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 [2022-01-18 16:50:59,919 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:50:59,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:50:59,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1730964982, now seen corresponding path program 104 times [2022-01-18 16:50:59,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:50:59,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715238848] [2022-01-18 16:50:59,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:50:59,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:50:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:51:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:00,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:51:00,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715238848] [2022-01-18 16:51:00,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715238848] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:51:00,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089700075] [2022-01-18 16:51:00,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:51:00,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:51:00,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:51:00,182 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) [2022-01-18 16:51:00,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 16:51:00,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:51:00,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:51:00,201 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:51:00,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:51:00,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:00,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:00,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:00,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:00,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:00,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:00,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:00,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:00,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:00,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:00,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:00,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:00,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:00,593 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 [2022-01-18 16:51:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:00,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:51:01,020 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:51:01,020 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 [2022-01-18 16:51:01,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:01,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:01,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:01,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:01,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:01,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:01,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:01,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:01,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:01,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:01,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:01,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:01,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:01,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:01,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:01,361 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 [2022-01-18 16:51:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:01,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089700075] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:51:01,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:51:01,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-01-18 16:51:01,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936307632] [2022-01-18 16:51:01,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:51:01,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:51:01,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:51:01,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:51:01,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:51:01,409 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) [2022-01-18 16:51:03,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:51:03,656 INFO L93 Difference]: Finished difference Result 9839 states and 23846 transitions. [2022-01-18 16:51:03,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 16:51:03,657 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 [2022-01-18 16:51:03,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:51:03,669 INFO L225 Difference]: With dead ends: 9839 [2022-01-18 16:51:03,670 INFO L226 Difference]: Without dead ends: 9794 [2022-01-18 16:51:03,670 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 [2022-01-18 16:51:03,670 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 219 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:51:03,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 363 Invalid, 1917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1436 Invalid, 0 Unknown, 410 Unchecked, 0.7s Time] [2022-01-18 16:51:03,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9794 states. [2022-01-18 16:51:03,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9794 to 8058. [2022-01-18 16:51:03,765 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) [2022-01-18 16:51:03,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8058 states to 8058 states and 20043 transitions. [2022-01-18 16:51:03,778 INFO L78 Accepts]: Start accepts. Automaton has 8058 states and 20043 transitions. Word has length 30 [2022-01-18 16:51:03,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:51:03,778 INFO L470 AbstractCegarLoop]: Abstraction has 8058 states and 20043 transitions. [2022-01-18 16:51:03,778 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) [2022-01-18 16:51:03,778 INFO L276 IsEmpty]: Start isEmpty. Operand 8058 states and 20043 transitions. [2022-01-18 16:51:03,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:51:03,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:51:03,786 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:51:03,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-01-18 16:51:03,986 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 [2022-01-18 16:51:03,986 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:51:03,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:51:03,986 INFO L85 PathProgramCache]: Analyzing trace with hash -158977306, now seen corresponding path program 105 times [2022-01-18 16:51:03,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:51:03,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579549025] [2022-01-18 16:51:03,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:51:03,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:51:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:51:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:04,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:51:04,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579549025] [2022-01-18 16:51:04,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579549025] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:51:04,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837293043] [2022-01-18 16:51:04,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:51:04,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:51:04,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:51:04,348 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) [2022-01-18 16:51:04,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 16:51:04,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:51:04,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:51:04,378 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:51:04,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:51:04,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:04,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:04,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:04,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:04,997 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:51:04,997 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 [2022-01-18 16:51:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:05,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:51:06,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:06,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:06,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:06,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:06,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:06,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:06,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:06,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:06,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:06,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:51:06,212 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 [2022-01-18 16:51:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:33,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837293043] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:51:33,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:51:33,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 39 [2022-01-18 16:51:33,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481884237] [2022-01-18 16:51:33,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:51:33,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:51:33,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:51:33,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:51:33,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:51:33,316 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) [2022-01-18 16:51:38,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:51:38,857 INFO L93 Difference]: Finished difference Result 11602 states and 28388 transitions. [2022-01-18 16:51:38,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-18 16:51:38,857 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 [2022-01-18 16:51:38,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:51:38,874 INFO L225 Difference]: With dead ends: 11602 [2022-01-18 16:51:38,874 INFO L226 Difference]: Without dead ends: 11545 [2022-01-18 16:51:38,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 36 SyntacticMatches, 11 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4469 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1996, Invalid=13010, Unknown=0, NotChecked=0, Total=15006 [2022-01-18 16:51:38,875 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 295 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 [2022-01-18 16:51:38,875 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] [2022-01-18 16:51:38,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11545 states. [2022-01-18 16:51:38,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11545 to 8002. [2022-01-18 16:51:38,989 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) [2022-01-18 16:51:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8002 states to 8002 states and 19927 transitions. [2022-01-18 16:51:39,002 INFO L78 Accepts]: Start accepts. Automaton has 8002 states and 19927 transitions. Word has length 30 [2022-01-18 16:51:39,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:51:39,002 INFO L470 AbstractCegarLoop]: Abstraction has 8002 states and 19927 transitions. [2022-01-18 16:51:39,002 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) [2022-01-18 16:51:39,002 INFO L276 IsEmpty]: Start isEmpty. Operand 8002 states and 19927 transitions. [2022-01-18 16:51:39,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:51:39,011 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:51:39,011 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:51:39,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-01-18 16:51:39,211 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 [2022-01-18 16:51:39,212 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:51:39,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:51:39,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1739359666, now seen corresponding path program 106 times [2022-01-18 16:51:39,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:51:39,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392148836] [2022-01-18 16:51:39,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:51:39,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:51:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:51:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:39,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:51:39,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392148836] [2022-01-18 16:51:39,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392148836] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:51:39,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139109936] [2022-01-18 16:51:39,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:51:39,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:51:39,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:51:39,504 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) [2022-01-18 16:51:39,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 16:51:39,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:51:39,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:51:39,531 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:51:39,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:51:39,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:39,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:39,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:39,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:39,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:39,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:39,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:39,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:39,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:39,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:39,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:39,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:39,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:39,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:39,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:39,981 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 [2022-01-18 16:51:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:40,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:51:40,376 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:51:40,377 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 [2022-01-18 16:51:40,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:40,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:40,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:40,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:40,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:40,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:40,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:40,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:40,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:40,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:40,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:40,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:40,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:40,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:40,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:40,694 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 [2022-01-18 16:51:40,744 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:40,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139109936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:51:40,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:51:40,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 16:51:40,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841324579] [2022-01-18 16:51:40,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:51:40,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:51:40,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:51:40,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:51:40,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:51:40,745 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) [2022-01-18 16:51:42,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:51:42,733 INFO L93 Difference]: Finished difference Result 8930 states and 22016 transitions. [2022-01-18 16:51:42,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 16:51:42,733 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 [2022-01-18 16:51:42,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:51:42,747 INFO L225 Difference]: With dead ends: 8930 [2022-01-18 16:51:42,747 INFO L226 Difference]: Without dead ends: 8896 [2022-01-18 16:51:42,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=494, Invalid=3666, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 16:51:42,747 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 [2022-01-18 16:51:42,748 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] [2022-01-18 16:51:42,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8896 states. [2022-01-18 16:51:42,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8896 to 8392. [2022-01-18 16:51:42,890 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) [2022-01-18 16:51:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8392 states to 8392 states and 21026 transitions. [2022-01-18 16:51:42,902 INFO L78 Accepts]: Start accepts. Automaton has 8392 states and 21026 transitions. Word has length 30 [2022-01-18 16:51:42,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:51:42,902 INFO L470 AbstractCegarLoop]: Abstraction has 8392 states and 21026 transitions. [2022-01-18 16:51:42,902 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) [2022-01-18 16:51:42,902 INFO L276 IsEmpty]: Start isEmpty. Operand 8392 states and 21026 transitions. [2022-01-18 16:51:42,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:51:42,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:51:42,910 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:51:42,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-01-18 16:51:43,110 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 [2022-01-18 16:51:43,110 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:51:43,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:51:43,111 INFO L85 PathProgramCache]: Analyzing trace with hash 335043182, now seen corresponding path program 107 times [2022-01-18 16:51:43,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:51:43,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979131908] [2022-01-18 16:51:43,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:51:43,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:51:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:51:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:43,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:51:43,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979131908] [2022-01-18 16:51:43,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979131908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:51:43,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509003731] [2022-01-18 16:51:43,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:51:43,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:51:43,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:51:43,384 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) [2022-01-18 16:51:43,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 16:51:43,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 16:51:43,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:51:43,405 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:51:43,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:51:43,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:43,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:43,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:43,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:43,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:43,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:43,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:43,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:43,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:43,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:43,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:43,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:43,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:43,775 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 [2022-01-18 16:51:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:43,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:51:44,213 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:51:44,214 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 [2022-01-18 16:51:44,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:44,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:44,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:44,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:44,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:44,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:44,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:44,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:44,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:44,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:44,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:44,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:44,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:44,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:44,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:44,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 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 [2022-01-18 16:51:44,790 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:44,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509003731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:51:44,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:51:44,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-01-18 16:51:44,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791310860] [2022-01-18 16:51:44,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:51:44,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:51:44,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:51:44,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:51:44,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:51:44,791 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) [2022-01-18 16:51:48,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:51:48,011 INFO L93 Difference]: Finished difference Result 9626 states and 23879 transitions. [2022-01-18 16:51:48,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 16:51:48,011 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 [2022-01-18 16:51:48,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:51:48,027 INFO L225 Difference]: With dead ends: 9626 [2022-01-18 16:51:48,028 INFO L226 Difference]: Without dead ends: 9520 [2022-01-18 16:51:48,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2068 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=912, Invalid=6228, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 16:51:48,029 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, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:51:48,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 419 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1591 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 16:51:48,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9520 states. [2022-01-18 16:51:48,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9520 to 8462. [2022-01-18 16:51:48,139 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) [2022-01-18 16:51:48,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8462 states to 8462 states and 21156 transitions. [2022-01-18 16:51:48,154 INFO L78 Accepts]: Start accepts. Automaton has 8462 states and 21156 transitions. Word has length 30 [2022-01-18 16:51:48,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:51:48,155 INFO L470 AbstractCegarLoop]: Abstraction has 8462 states and 21156 transitions. [2022-01-18 16:51:48,155 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) [2022-01-18 16:51:48,155 INFO L276 IsEmpty]: Start isEmpty. Operand 8462 states and 21156 transitions. [2022-01-18 16:51:48,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:51:48,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:51:48,165 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:51:48,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-01-18 16:51:48,365 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 [2022-01-18 16:51:48,365 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:51:48,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:51:48,365 INFO L85 PathProgramCache]: Analyzing trace with hash 129104750, now seen corresponding path program 108 times [2022-01-18 16:51:48,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:51:48,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193653388] [2022-01-18 16:51:48,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:51:48,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:51:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:51:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:51:48,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:51:48,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193653388] [2022-01-18 16:51:48,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193653388] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:51:48,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380893395] [2022-01-18 16:51:48,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:51:48,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:51:48,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:51:48,644 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) [2022-01-18 16:51:48,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 16:51:48,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:51:48,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:51:48,666 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:51:48,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:51:50,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:50,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:50,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:50,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:50,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:50,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:51:50,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:50,608 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:51:50,608 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 [2022-01-18 16:51:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:51:51,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:51:52,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:52,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:52,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:52,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:52,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:52,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:51:52,214 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:51:52,214 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 Received shutdown request... [2022-01-18 16:53:07,391 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-01-18 16:53:07,392 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 16:53:07,404 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 16:53:07,404 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 [2022-01-18 16:53:07,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-01-18 16:53:07,592 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 [2022-01-18 16:53:07,593 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 13ms.. [2022-01-18 16:53:07,594 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 16:53:07,594 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 16:53:07,596 INFO L732 BasicCegarLoop]: Path program histogram: [108, 2, 2, 1] [2022-01-18 16:53:07,598 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 16:53:07,598 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 16:53:07,600 INFO L202 PluginConnector]: Adding new model counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 04:53:07 BasicIcfg [2022-01-18 16:53:07,600 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 16:53:07,600 INFO L158 Benchmark]: Toolchain (without parser) took 786485.90ms. Allocated memory was 367.0MB in the beginning and 916.5MB in the end (delta: 549.5MB). Free memory was 328.7MB in the beginning and 501.4MB in the end (delta: -172.7MB). Peak memory consumption was 630.7MB. Max. memory is 16.0GB. [2022-01-18 16:53:07,600 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.14ms. Allocated memory is still 367.0MB. Free memory is still 329.8MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 16:53:07,600 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.56ms. Allocated memory is still 367.0MB. Free memory was 328.6MB in the beginning and 327.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 16:53:07,600 INFO L158 Benchmark]: Boogie Preprocessor took 16.59ms. Allocated memory is still 367.0MB. Free memory was 327.1MB in the beginning and 326.2MB in the end (delta: 903.8kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 16:53:07,600 INFO L158 Benchmark]: RCFGBuilder took 184.46ms. Allocated memory is still 367.0MB. Free memory was 326.1MB in the beginning and 317.3MB in the end (delta: 8.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 16:53:07,600 INFO L158 Benchmark]: TraceAbstraction took 786248.76ms. Allocated memory was 367.0MB in the beginning and 916.5MB in the end (delta: 549.5MB). Free memory was 316.9MB in the beginning and 501.4MB in the end (delta: -184.6MB). Peak memory consumption was 618.1MB. Max. memory is 16.0GB. [2022-01-18 16:53:07,601 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 0.14ms. Allocated memory is still 367.0MB. Free memory is still 329.8MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 30.56ms. Allocated memory is still 367.0MB. Free memory was 328.6MB in the beginning and 327.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 16.59ms. Allocated memory is still 367.0MB. Free memory was 327.1MB in the beginning and 326.2MB in the end (delta: 903.8kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 184.46ms. Allocated memory is still 367.0MB. Free memory was 326.1MB in the beginning and 317.3MB in the end (delta: 8.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 786248.76ms. Allocated memory was 367.0MB in the beginning and 916.5MB in the end (delta: 549.5MB). Free memory was 316.9MB in the beginning and 501.4MB in the end (delta: -184.6MB). Peak memory consumption was 618.1MB. Max. memory is 16.0GB. * 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 analyzing trace of length 31 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 13ms.. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 13ms.. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 13ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 31 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 786.2s, OverallIterations: 113, TraceHistogramMax: 4, PathProgramHistogramMax: 108, EmptinessCheckTime: 0.3s, AutomataDifference: 179.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21810 SdHoareTripleChecker+Valid, 38.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21810 mSDsluCounter, 21418 SdHoareTripleChecker+Invalid, 32.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 19816 IncrementalHoareTripleChecker+Unchecked, 36024 mSDsCounter, 6645 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 74343 IncrementalHoareTripleChecker+Invalid, 100804 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6645 mSolverCounterUnsat, 1940 mSDtfsCounter, 74343 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10994 GetRequests, 4007 SyntacticMatches, 530 SemanticMatches, 6457 ConstructedPredicates, 0 IntricatePredicates, 10 DeprecatedPredicates, 138017 ImplicationChecksByTransitivity, 178.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8462occurred in iteration=112, InterpolantAutomatonStates: 4994, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.3s AutomataMinimizationTime, 112 MinimizatonAttempts, 82012 StatesRemovedByMinimization, 112 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 496.6s InterpolantComputationTime, 5778 NumberOfCodeBlocks, 5778 NumberOfCodeBlocksAsserted, 437 NumberOfCheckSat, 8308 ConstructedInterpolants, 566 QuantifiedInterpolants, 168386 SizeOfPredicates, 719 NumberOfNonLiveVariables, 6389 ConjunctsInSsa, 2526 ConjunctsInUnsatCore, 328 InterpolantComputations, 5 PerfectInterpolantSequences, 996/6870 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